Computed tomography apparatus and computed tomography method using multiple light sources

Abstract

According to various embodiments, a computed tomography (CT) scanning apparatus may include: a gantry including a first rotating device, a second rotating device, and a third rotating device in a ring shape that share a common rotation axis and can rotate independently of each other; a plurality of first light sources arranged at regular intervals on the first rotating device and configured to irradiate an object with X-rays; a plurality of second light sources arranged at regular intervals on the second rotating device and configured to irradiate the object with X-rays; a detection device arranged in a region of the third rotating device and configured to detect X-rays that have penetrated the object; and one or more processors.

Description

Technical Field

[0001] The present disclosure relates to a computerized tomography apparatus and a computerized tomography method using multiple light sources. Background Art

[0002] Computed tomography (CT) is a non-invasive bio-imaging scanning method. A CT scanner irradiates an object with X-rays from multiple directions, uses a detector to detect the portion of the X-rays that have penetrated the object, converts the output data from the detector into electrical signals, and reconstructs the image, thereby obtaining a CT image of the object. Generally, in a CT scanner, the object is positioned within a ring-shaped gantry equipped with an X-ray source. As the gantry rotates, X-rays are irradiated onto the object, thereby obtaining cross-sectional images of the object. By reconstructing the cross-sectional images of the object, a three-dimensional image of the object can be obtained. Summary of the Invention

[0003] Technical issues

[0004] To obtain a computed tomography image of an object, a computed tomography (CT) scanner using a single light source (e.g., an X-ray source) irradiates the object with X-rays while rotating 360 degrees around the object. As the rotation angle of the gantry equipped with the single light source increases, wires connected to the gantry (e.g., wires supplying power to the light source) can become tangled.

[0005] Light sources require high power to emit X-rays. Therefore, CT scanners using multiple light sources cannot operate all of them simultaneously. In this case, obtaining a CT image of a subject requires optimally configuring the arrangement of the light sources and the order in which they emit X-rays.

[0006] Technical Solution

[0007] According to various embodiments of the present disclosure, a computed tomography apparatus may include: a gantry, the gantry including a first rotating device, a second rotating device, and a third rotating device in a ring shape that share a rotation axis and can rotate independently of each other; a plurality of first light sources, the plurality of first light sources being arranged at regular intervals on the first rotating device and configured to irradiate an object with X-rays; a plurality of second light sources, the plurality of second light sources being arranged at regular intervals on the second rotating device and configured to irradiate an object with X-rays; a detection device, the detection device being arranged in an area of the third rotating device and configured to detect X-rays that penetrate the object; and one or more processors; wherein the one or more processors may be configured as follows: controlling the first rotating device to repeat a first action and a second action, the first action causing the first rotating device to rotate in a first rotation direction according to a rotation angle determined based on the number of the plurality of first light sources and the plurality of second light sources, and the second action causing the first rotating device to rotate in a first rotation direction as the first rotation angle. The object is rotated in a second rotational direction opposite to the rotational direction by the determined rotation angle, and the second rotation device is controlled to repeat a third action and a fourth action, wherein the third action causes the second rotation device to rotate in the second rotational direction by the determined rotation angle, and the fourth action causes the second rotation device to rotate in the first rotational direction by the determined rotation angle. While the first rotation device repeats the first and second actions and the second rotation device repeats the third and fourth actions, the third rotation device is controlled to rotate in the first rotational direction at the same rotation speed as the first and second rotation devices. While the first rotation device performs the first action, one of the plurality of first light sources is used to irradiate the object with X-rays. While the second rotation device performs the fourth action, one of the plurality of second light sources is used to irradiate the object with X-rays, and the detection device detects the X-rays that have penetrated the object.

[0008] According to various embodiments of the present disclosure, a computed tomography method for a computed tomography apparatus includes: a gantry including a first rotating device, a second rotating device, and a third rotating device in a ring shape that share a common rotation axis and can rotate independently of each other; a plurality of first light sources, the plurality of first light sources being arranged at regular intervals on the first rotating device and configured to irradiate an object with X-rays; a plurality of second light sources, the plurality of second light sources being arranged at regular intervals on the second rotating device and configured to irradiate the object with X-rays; and a detection device, the detection device being arranged in a region of the third rotating device and configured to detect X-rays that penetrate the object; wherein the computed tomography method may include: controlling the first rotating device to repeat a first action and a second action, wherein the first action causes the first rotating device to rotate in a first rotation direction by an angle determined based on the number of the plurality of first light sources and the plurality of second light sources. , the second action causes the first rotating device to rotate in a second rotation direction which is opposite to the first rotation direction by the degree of the determined rotation angle; controlling the second rotating device to repeat a third action and a fourth action, wherein the third action causes the second rotating device to rotate in the second rotation direction by the degree of the determined rotation angle, and the fourth action causes the second rotating device to rotate in the first rotation direction by the degree of the determined rotation angle; controlling the action of the third rotating device so that the third rotating device rotates in the first rotation direction at the same rotation speed as the first rotating device and the second rotating device; irradiating the object with X-rays through one of the multiple first light sources during the period when the first rotating device performs the first action, and irradiating the object with X-rays through one of the multiple second light sources during the period when the second rotating device performs the fourth action; and detecting the X-rays that penetrate the object through the detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a block diagram of a computed tomography apparatus according to various embodiments of the present disclosure.

[0010] Figure 2 2 is a diagram illustrating a computer tomography apparatus according to various embodiments.

[0011] Figure 3a and 3b FIG2 is a diagram illustrating a method of obtaining a circular computed tomography image of an object according to various embodiments of the present disclosure.

[0012] Figure 4FIG2 is a diagram illustrating a method of obtaining a spiral computed tomography image of a subject according to various embodiments of the present disclosure.

[0013] Figure 5 is a diagram illustrating a computer tomography apparatus according to a first embodiment of the present invention, Figure 6 FIG. 1 is a cross-sectional view of the scanning frame according to the first embodiment in the xy plane.

[0014] Figure 7 1 is a diagram illustrating a computed tomography method of the computed tomography apparatus according to the configuration of the first embodiment.

[0015] Figure 8 1 is a diagram illustrating a computed tomography method of the computed tomography apparatus according to the configuration of the first embodiment.

[0016] Figure 9 FIG. 1 is an operation flow chart of the computed tomography apparatus according to the first embodiment.

[0017] Figure 10 FIG. 1 is a cross-sectional view in the xy plane of a gantry of a computed tomography apparatus according to the second embodiment.

[0018] Figure 11 1 is a diagram illustrating a computed tomography method of a computed tomography apparatus according to the configuration of the second embodiment.

[0019] Figure 12 1 is a diagram illustrating a computed tomography method of a computed tomography apparatus according to the configuration of the second embodiment.

[0020] Figure 13 1 is a diagram illustrating a computed tomography method of a computed tomography apparatus according to the configuration of the second embodiment.

[0021] Figure 14 This is an operation flow chart of the computed tomography apparatus having the structure of the second embodiment.

[0022] Figure 15a is an xy-plane cross-sectional view of a scanning frame of a computed tomography apparatus according to a third embodiment. Figure 15b 2 is a sectional view in the yz plane of the scanning frame according to the structure of the third embodiment.

[0023] Figure 16 1 is a diagram illustrating a computed tomography method of a computed tomography apparatus according to the configuration of the third embodiment.

[0024] Figure 17 1 is a diagram illustrating an xy plane view of a gantry of a computed tomography apparatus according to a fourth embodiment.

[0025] Figure 18 1 is a diagram illustrating a computed tomography method of a computed tomography apparatus according to the configuration of the fourth embodiment.

[0026] Figure 19 1 is a diagram illustrating a computed tomography method of a computed tomography apparatus according to the configuration of the fourth embodiment.

[0027] Figure 20 1 is a diagram illustrating a computed tomography method of a computed tomography apparatus according to the configuration of the fourth embodiment.

[0028] Figure 21 FIG. 4 is an operation flow chart of a computed tomography apparatus having the structure of the fourth embodiment.

[0029] Figure 22 FIG. 1 is a cross-sectional view in the xy plane of a gantry of a computed tomography apparatus according to a fifth embodiment.

[0030] Figure 23 1 is a diagram illustrating a computed tomography method of a computed tomography apparatus according to the configuration of the fifth embodiment.

[0031] Figure 24 1 is a diagram illustrating a computed tomography method of a computed tomography apparatus according to the configuration of the fifth embodiment.

[0032] Figure 25 1 is a diagram illustrating a computed tomography method of a computed tomography apparatus according to the configuration of the fifth embodiment.

[0033] Figure 26 This is an operation flow chart of the computed tomography apparatus having the structure of the fifth embodiment.

[0034] Figure 27a FIG. 1 is a cross-sectional view of the scanning frame of the computed tomography apparatus according to the sixth embodiment. Figure 27b FIG. 1 is a yz-plane cross-sectional view of a scanning gantry according to the sixth embodiment.

[0035] Figure 28 1 is a diagram illustrating a computed tomography method of a computed tomography apparatus according to the configuration of the sixth embodiment.

[0036] Figure 29 1 is a diagram illustrating a computed tomography method of a computed tomography apparatus according to the configuration of the sixth embodiment.

[0037] Figure 30 It is an operation flow chart of the computed tomography apparatus having the structure of the sixth embodiment.

[0038] Figure 31a and Figure 31b This is a diagram illustrating a method of adjusting the viewing area of a computed tomography apparatus.

[0039] Figure 32 This diagram illustrates a method of adjusting the visible area using multiple light sources.

[0040] Figure 33 FIG2 is a diagram illustrating a computer tomography apparatus according to various embodiments of the present disclosure.

[0041] Figure 34a is an xy-plane cross-sectional view of a gantry of a computed tomography apparatus according to various embodiments, Figure 34b It is a diagram schematically showing a yz cross-sectional view of the gantry.

[0042] Figure 35a is an xy-plane cross-sectional view of a gantry of a computed tomography apparatus according to various embodiments, Figure 35b It is a diagram schematically showing a yz cross-sectional view of the gantry. DETAILED DESCRIPTION

[0043] The embodiments of the present disclosure are provided for the purpose of illustrating the technical concept of the present disclosure. The scope of the rights of the present disclosure is not limited to the following embodiments or the specific description of these embodiments.

[0044] Unless otherwise defined, all technical and scientific terms used in this disclosure have the meanings commonly understood by those skilled in the art to which this disclosure belongs. All terms used in this disclosure are selected for the purpose of more clearly describing this disclosure and are not selected for the purpose of limiting the scope of rights of this disclosure.

[0045] Expressions such as “including,” “having,” and “having” used in the present disclosure should be understood as open-ended terms having the possibility of including other embodiments, unless otherwise mentioned in a sentence or article containing the expression.

[0046] Singular expressions described in the present disclosure may include plural meanings unless otherwise mentioned, and this also applies to singular expressions described in the claims.

[0047] The expressions “first”, “second”, etc. used in the present disclosure are used to distinguish multiple components from each other, and do not limit the order or importance of the corresponding components.

[0048] The term "unit" as used in this disclosure means software or hardware components such as FPGA (field-programmable gate array) and ASIC (application specific integrated circuit). However, "unit" is not limited to hardware and software. A "unit" can be configured to be located in an addressable storage medium or to enable one or more processors to run. Therefore, as an example, a "unit" includes components such as software components, object-pointing software components, cluster components and task components, as well as processors, functions, attributes, programs, subroutines, fragments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, worksheets, arrays and variables. The functions provided in the components and "units" can be combined with a smaller number of components and "units", or further separated into additional components and "units".

[0049] The expression "based on ~" used in this disclosure is used to describe one or more factors that affect the decision, judgment behavior or action described in the words or sentences containing the expression. This expression does not exclude additional factors that affect the decision, judgment behavior or action.

[0050] In the present disclosure, when it is mentioned that a certain component is "connected to" or "linked to" other components, it should be understood that the certain component may be directly connected or linked to the other components, or may be connected or linked with other new components as the medium.

[0051] The following describes embodiments of the present disclosure with reference to the accompanying drawings. In the accompanying drawings, identical or corresponding components are assigned the same reference numerals. Furthermore, in the following descriptions of the embodiments, repeated descriptions of identical or corresponding components may be omitted. However, even if the description of a component is omitted, it does not mean that such component is not included in a particular embodiment.

[0052] Figure 1 FIG. 1 is a block diagram of a computed tomography apparatus 100 according to various embodiments of the present disclosure.

[0053] Reference Figure 1 According to various embodiments, the computed tomography apparatus 100 may include a processor 110 and a gantry 120 . According to various embodiments, the computed tomography apparatus 100 may further include a transfer unit 150 and a power supply 160 . Figure 1 Even if some of the components shown in the drawings are omitted or replaced, it will not hinder the implementation of the various embodiments disclosed in this document.

[0054] According to various embodiments, the processor 110 may be a component capable of performing operations or data processing related to control and / or communication with the various components of the computed tomography apparatus 100. For example, the processor 110 may be operatively connected to the components of the computed tomography apparatus 100. The processor 110 may load commands or data received from other components of the computed tomography apparatus 100 into a memory (not shown), process the commands or data stored in the memory, and store the resulting data. According to various embodiments, the computed tomography apparatus 100 may include one or more processors 110.

[0055] According to various embodiments, the gantry 120 may be a structure equipped with a plurality of light sources 130 and a detection device 140. The gantry 120 may be a ring-shaped (or tunnel-shaped) structure that enables the plurality of light sources 130 and the detection device 140 to rotate about a predetermined axis.

[0056] According to various embodiments, the light source 130 may be an X-ray source capable of emitting X-rays. Under the control of the processor 110, the light source 130 may irradiate an object with X-rays. The object may, for example, be located within the bore (or internal hole) of the gantry 120. According to various embodiments, the computed tomography apparatus 100 may include multiple light sources 130. For example, the multiple light sources 130 may be X-ray light sources utilizing carbon nanotubes (CNTs).

[0057] According to various embodiments, the detection device 140 may be an X-ray detection device 140 (X-ray detector) that detects the amount of X-rays (or the intensity of X-rays). The detection device 140 may detect the amount of X-rays that penetrate the object among the X-rays irradiated from the light source 130. When the internal density of the object is uneven, the amount absorbed by the object will vary depending on the direction of the X-ray irradiation. The detection device 140 may measure the amount of X-rays irradiated from various angles that are reduced when penetrating the object. The processor 110 may determine the density inside the object based on the data measured by the detection device 140, and use the determined internal density of the object to reconstruct a detailed cross-section of the object and generate a three-dimensional image. According to various embodiments, the computed tomography apparatus 100 may include at least one detection device 140.

[0058] According to one embodiment, a computed tomography apparatus 100 may include a gantry 120, a plurality of light sources 130, and a detection device 140. The gantry 120 may include a first rotating device and a second rotating device in a ring shape that share a common rotation axis and can rotate independently of each other. The plurality of light sources 130 may be arranged at regular intervals on the first rotating device, and the detection device 140 may be arranged on the second rotating device. For example, the plurality of light sources 130 may be arranged at regular intervals on the inner side surface of the first rotating device to irradiate an object located within the gantry 120 with X-rays. For example, the detection device 140 may be configured to surround the entire inner side surface of the second rotating device. In this case, even if X-rays are irradiated from any one of the plurality of light sources 130, the detection device 140 can detect X-rays that have penetrated the object.

[0059] According to one embodiment, a computed tomography apparatus 100 may include a gantry 120, a plurality of light sources 130, and a plurality of detection devices 140. The gantry 120 may include a rotating device in a ring shape that can rotate around a rotation axis. The plurality of light sources 130 may be arranged on the rotating device at regular intervals. The plurality of detection devices 140 may be arranged at positions corresponding to and facing the plurality of light sources 130. The plurality of light sources 130 may irradiate an object carried on a transfer portion 150 with X-rays, and the plurality of detection devices 140 may detect the X-rays that penetrate the object. The positions of the plurality of light sources 130 on the rotation axis of the rotating device may be the same. For example, the positions of the plurality of light sources 130 on the z-axis may be the same.

[0060] According to one embodiment, a computed tomography apparatus 100 may include a gantry 120, a plurality of light sources 130, and a plurality of detection devices 140. The gantry 120 may include a ring-shaped rotating device capable of rotating about a rotation axis. The plurality of light sources 130 may be arranged at regular intervals on the rotating device. The plurality of detection devices 140 may be arranged at positions corresponding to and facing the plurality of light sources 130. The plurality of light sources 130 may be spaced apart along the rotation axis of the rotating device at regular intervals. For example, the plurality of light sources 130 may have different positions on the z-axis.

[0061] According to one embodiment, a computed tomography apparatus 100 may include a gantry 120, a plurality of light sources 130, and a detection device 140. The gantry 120 may include a ring-shaped rotating device capable of rotating about a rotation axis. The gantry 120 may be separated into a first portion and a second portion. The plurality of light sources 130 may be spaced apart and arranged in the first portion. The detection device 140 may be arranged in the second portion.

[0062] According to one embodiment, a computed tomography apparatus 100 may include a gantry 120, a plurality of light sources 130, and a detection device 140. The gantry 120 may include a first rotating device and a second rotating device in the form of rings that share a common rotation axis and can rotate independently of each other. The plurality of light sources 130 may be arranged at regular intervals on the first rotating device. The detection device 140 may be arranged in a region of the second rotating device.

[0063] According to one embodiment, a computed tomography apparatus 100 may include a gantry 120, a plurality of first light sources 130, a plurality of second light sources 130, and a detection device 140. The gantry 120 may include a first rotating device, a second rotating device, and a third rotating device in a ring-shaped configuration that share a common rotation axis and can rotate independently. The plurality of first light sources 130 may be arranged at regular intervals on the first rotating device. The plurality of second light sources 130 may be arranged at regular intervals on the second rotating device. The detection device 140 may be positioned in a region of the third rotating device.

[0064] According to various embodiments, the transfer unit 150 may be a device that can move within the aperture of the ring-shaped gantry 120 in the direction of the rotation axis of the gantry 120. The transfer unit 150 may carry an object to be scanned by computed tomography.

[0065] The power supply device 160 according to various embodiments can supply power required to operate various components of the computed tomography apparatus 100. The power supply device 160 can also supply power required for the plurality of light sources 130 to emit X-rays.

[0066] Figure 2 1 is a diagram illustrating a computer tomography apparatus 100 according to various embodiments. For example, Figure 2 This diagram schematically illustrates only the configuration necessary for explaining the operation method of the computed tomography apparatus 100 .

[0067] Reference Figure 2 According to various embodiments, the computed tomography apparatus 100 may include a plurality of light sources and at least one detection device, wherein the plurality of light sources are used to irradiate X-rays to the object O, and the at least one detection device is used to detect the X-rays that penetrate the object O.

[0068] According to various embodiments, the object O may be placed on the transfer unit 150 . The transfer unit 150 may pass through an aperture of the gantry 120 and move toward the rotation axis of the gantry 120 .

[0069] According to various embodiments, the computed tomography apparatus 100 may obtain a computed tomography image of an object O located within the aperture of the gantry 120 by irradiating the object O with X-rays while a plurality of light sources disposed on the gantry 120 rotate about the object O. The X-rays that have penetrated the object O may be detected by at least one detection device.

[0070] Figure 3a and 3b FIG2 is a diagram illustrating a method of obtaining a circular computed tomography image of an object according to various embodiments of the present disclosure.

[0071] Reference Figure 3a and 3b According to various embodiments, the CT apparatus 100 can obtain circular CT images of different portions of an object O and combine the obtained circular CT images to generate an image of the entire object O. The processor 110 of the CT apparatus 100 can move the transport unit 150 carrying the object O by a preset distance and repeatedly perform the operation of obtaining CT images of the object O a preset number of times.

[0072] like Figure 3a As shown in the figure, the processor 110 can stop the transfer unit 150 when the transfer unit 150 carrying the object O moves in the direction of the rotation axis of the scanning frame 120 so that the head of the object O is located in the aperture. When the transfer unit 150 is stopped, the processor 110 can use multiple light sources 130 and at least one detection device 140 to obtain a circular computed tomography image of the head of the object O. Then, the processor 110 can move the transfer unit 150 according to a preset distance and then stop. In the above case, if Figure 3b As shown, the chest of the subject O may be located within the aperture. The processor 110 may utilize multiple light sources 130 and at least one detection device 140 to obtain a circular computed tomography image of the chest of the subject O. The processor 110 may repeatedly perform the above steps to obtain circular computed tomography images of different portions of the subject O. The obtained circular computed tomography images may be combined to generate an image of the entire subject O.

[0073] Figure 4 FIG2 is a diagram illustrating a method of obtaining a spiral computed tomography image of a subject according to various embodiments of the present disclosure.

[0074] Reference Figure 4According to various embodiments, the computed tomography apparatus 100 can obtain a spiral computed tomography image of an object O and generate an image of the entire object O using the spiral computed tomography image. For example, the processor 110 of the computed tomography apparatus 100 can cause the transport unit 150 carrying the object O to move at a predetermined speed. While the transport unit 150 moves at the predetermined speed, the processor 110 can obtain a spiral computed tomography image of the object O using the multiple light sources 130 and the at least one detection device 140. The processor 110 can generate an image of the entire object O using the spiral computed tomography image of the object O.

[0075] <Structure of the First Embodiment>

[0076] Figures 5 to 9 1 is a diagram for explaining a computed tomography apparatus 100 having the structure of the first embodiment and a computed tomography method thereof.

[0077] Figure 5 is a diagram illustrating a computer tomography apparatus according to a first embodiment of the present invention, Figure 6 FIG. 1 is a cross-sectional view of the scanning frame according to the first embodiment in the xy plane.

[0078] Reference Figure 5 and Figure 6 According to various embodiments, a computed tomography apparatus 100 may include a gantry, a plurality of light sources 531, 533, 535, and a detection device 540. The gantry may include a first rotating device 521 and a second rotating device 523 in a ring shape that share a common rotation axis and can rotate independently of each other. The plurality of light sources 531, 533, 535 may be arranged at regular intervals on the first rotating device 521. The detection device 540 may be configured to completely surround the inner side surface of the second rotating device 523. The plurality of light sources may irradiate an object O carried by a transport unit 550 with X-rays, and the detection device 540 may detect the X-rays that have penetrated the object O. In this figure, for ease of explanation, the number of the plurality of light sources is assumed to be three, but the number of the plurality of light sources is not limited thereto and may also be two or more than three.

[0079] According to various embodiments, the processor 110 may determine the angular intervals between the light sources 531, 533, 535 within the first rotating device 521 and the rotation angle of the first rotating device 521 based on the number of the light sources 531, 533, 535. The processor 110 may determine the angular intervals between the light sources 531, 533, 535 within the first rotating device 521 as a value obtained by dividing 360 degrees by the number of the light sources 531, 533, 535, and may determine the rotation angle of the first rotating device 521 as a value obtained by dividing 360 degrees by the number of the light sources 531, 533, 535. For example, when the number of the light sources 531, 533, 535 is three, the light sources 531, 533, 535 may be arranged at 120-degree intervals within the first rotating device 521, and the rotation angle of the first rotating device 521 may be determined to be 120 degrees. In the above case, even if the first rotating device 521 rotates only 120 degrees, a three-dimensional image of the object O can be generated because there are three light sources arranged at intervals of 120 degrees.

[0080] When the detection device 540 according to various embodiments is constructed in a form that completely surrounds the inner surface of the second rotating device 523, the detection device 540 can detect the X-rays that penetrate the object O even if the processor only irradiates the object O with X-rays from any one of the multiple light sources 531, 533, and 535.

[0081] Figure 7 1 is a diagram illustrating a computer tomography method of the computer tomography apparatus 100 according to the first embodiment. Specifically, Figure 7 1 is a graph illustrating the operational states of the plurality of light sources 531 , 533 , 535 , the first rotating device 521 , and the transfer unit 550 over time when there are three plurality of light sources 531 , 533 , 535 .

[0082] In the diagram of the first rotating device 521 in graph 700, operation state 1 may refer to a state of rotation in a first rotational direction, operation state 0 may refer to a state of non-rotation, and operation state -1 may refer to a state of rotation in a second rotational direction opposite to the first rotational direction. In the diagram of the first light source 531, the second light source 533, and the third light source 535 in graph 700, operation state 1 may refer to a state of irradiation of X-rays, and operation state 0 may refer to a state of non-irradiation of X-rays. In the diagram of the transfer unit 550 in graph 700, operation state 1 may refer to a state of movement in the positive direction (+ direction) of the rotation axis, and operation state -1 may refer to a state of movement in the negative direction (- direction) of the rotation axis.

[0083] According to various embodiments, the CT apparatus 100 can use the operation method shown in the diagram 700 to obtain circular CT images of different parts of an object, and combine the obtained circular CT images to generate an image of the entire object.

[0084] According to various embodiments, the processor 110 can rotate the first rotating device 521 in the first rotational direction by a rotation angle determined based on the number of the plurality of light sources 531, 533, and 535. For example, when the number of the plurality of light sources 531, 533, and 535 is three, the rotation angle of the first rotating device 521 can be determined to be 120 degrees. Referring to the graph of the first rotating device 521 in chart 700, the processor 110 can rotate the first rotating device 521 by 120 degrees in the first rotational direction from t1 to t2.

[0085] According to various embodiments, the processor 110 can irradiate X-rays toward the object through at least one of the multiple light sources 531, 533, and 535 while the first rotating device 521 rotates in the first rotational direction. The processor 110 can control the multiple light sources so that, during the rotation of the first rotating device 521 in the first rotational direction, the multiple light sources 531, 533, and 535 alternately irradiate X-rays toward the object in a preset order per unit angle. For example, each time the first rotating device 521 rotates 1 degree, the light source to irradiate X-rays can be changed in a preset order.

[0086] Referring to the chart 700 for the first light source 531, the second light source 533, and the third light source 535, the processor 110 may, during the period when the first rotating device 521 rotates from 0 degrees to 1 degree in the first rotation direction, that is, from t1 to t 13 During the rotation, the first light source 531, the second light source 533 and the third light source 535 are controlled to irradiate the object with X-rays in sequence and alternately. For example, the processor 110 may control the first rotating device 521 to rotate from 0 degrees to 1 / 3 degrees in the first rotation direction, that is, from t1 to t 11 During the rotation, the first light source 531 among the plurality of light sources irradiates the object with X-rays. The processor 110 may rotate the first rotating device 521 from 1 / 3 degree to 2 / 3 degree, that is, from t 11 to t 12 During the rotation, the second light source 533 among the plurality of light sources irradiates the object with X-rays. The processor 110 may rotate the first rotating device 521 from 2 / 3 degrees to 1 degree, that is, from t 12 to t 13, the plurality of light sources are controlled so that the third light source 535 among the plurality of light sources irradiates the object with X-rays. The processor 110 can then control the plurality of light sources so that the first light source 531, the second light source 533, and the third light source 535 are alternately irradiated onto the object with X-rays. Assuming that a sequence in which the first light source 531, the second light source 533, and the third light source 535 sequentially irradiate X-rays while the first rotating device 521 rotates 1 degree in the first rotation direction is a sequence, the processor 110 can control the plurality of light sources so that the plurality of light sources alternately irradiate the object with X-rays in a predetermined order by repeatedly executing the sequence 120 times at 1-degree intervals while the first rotating device 521 rotates from 0 to 120 degrees.

[0087] According to various embodiments, the processor 110 can detect X-rays penetrating the object using the detection device 540 while the first rotating device 521 rotates in a first rotational direction. In this case, the processor 110 can generate at least one low-resolution image of the object based on the X-rays detected by the detection device 540. The processor 110 can generate a three-dimensional image of the object based on the at least one low-resolution image of the object. In this case, the three-dimensional image of the object can be a circular computed tomography image. According to various embodiments, the processor 110 can either rotate the second rotating device 523 equipped with the detection device 540 in the same direction or not rotate the second rotating device 523 while the first rotating device 521 rotates.

[0088] According to various embodiments, after the first rotating device 521 rotates in the first rotation direction according to a predetermined rotation angle, the processor 110 can stop the first rotating device 521 and move the transfer unit 550 by a predetermined distance. Referring to the diagram of the transfer unit 550 in FIG700 , the processor 110 can move the transfer unit 550 by a predetermined distance from t2 to t3. Between t2 and t3, the processor 110 can deactivate the multiple light sources 531, 533, and 535 and prevent the first rotating device 521 from rotating.

[0089] According to various embodiments, the processor 110 can rotate the first rotating device 521 in a second rotational direction opposite to the first rotational direction according to the determined rotation angle. Referring to the graph of the first rotating device 521 in chart 700, the processor 110 can rotate the first rotating device 521 in the second rotational direction by 120 degrees from t3 to t4.

[0090] According to various embodiments, the processor 110 may irradiate an object with X-rays via at least one of the multiple light sources 531, 533, and 535 while the first rotating device 521 rotates in the second rotational direction. The processor 110 may control the multiple light sources so that, during the rotation of the first rotating device 521 in the second rotational direction, the multiple light sources 531, 533, and 535 alternately irradiate the object with X-rays in a preset order per unit angle. For example, each time the first rotating device 521 rotates 1 degree, the light source to irradiate X-rays may be changed in a preset order.

[0091] Referring to the chart of the first light source 531, the second light source 533 and the third light source 535 in the chart 700, the processor 110 may rotate the first rotating device 521 from 120 degrees to 119 degrees in the second rotation direction, that is, from t3 to t 33 During the rotation, the third light source 535, the second light source 533 and the first light source 531 are controlled in a manner of irradiating X-rays to the object in sequence. For example, the processor 110 may rotate the first rotating device 521 from 120 degrees to During the period of rotation in the second rotation direction, that is, from t3 to t 31 During the rotation in the second direction, the third light source 535 among the plurality of light sources irradiates the object with X-rays. Degrees rotate to degree period, that is, from t 31 to t 32 During the rotation, the second light source 533 among the plurality of light sources irradiates the object with X-rays. During the rotation from t 32 to t 33, the first light source 531 among the multiple light sources is controlled to irradiate X-rays toward the object. The processor 110 can then control the multiple light sources so that the third light source 535, the second light source 533, and the first light source 531 are alternately irradiated toward the object with X-rays. Assuming that the third light source 535, the second light source 533, and the first light source 531 sequentially irradiate X-rays while the first rotating device 521 rotates 1 degree in the second rotational direction is a sequence, the processor 110 can control the multiple light sources so that the multiple light sources alternately irradiate X-rays toward the object one by one in a pre-set order by repeatedly executing the sequence 120 times at 1-degree intervals while the first rotating device 521 rotates in the second rotational direction from 120 degrees to 0 degrees. In this figure, a situation is illustrated in which X-rays are irradiated to the object alternately in the order of the third light source 535, the second light source 533 and the first light source 531 while the first rotating device 521 rotates in the second rotation direction. However, it is of course also possible to irradiate the object alternately in the order of the first light source 531, the second light source 533 and the third light source 535.

[0092] According to various embodiments, the processor 110 can repeatedly execute a loop a preset number of times, including: rotating the first rotating device 521 in a first rotational direction according to a predetermined rotational angle; moving the transfer unit 550 a preset distance toward the rotation axis after the first rotating device 521 rotates in the first rotational direction according to the predetermined rotational angle; rotating the first rotating device 521 in a second rotational direction according to the predetermined rotational angle; and moving the transfer unit 550 a preset distance toward the rotation axis after the first rotating device 521 rotates in the second rotational direction according to the predetermined rotational angle. By repeatedly executing this loop a preset number of times, circular CT images of different portions of a subject can be obtained. The processor 110 can combine the obtained circular CT images to obtain a three-dimensional image of the entire subject.

[0093] Figure 8 1 is a diagram illustrating a computer tomography method of the computer tomography apparatus 100 according to the first embodiment. Specifically, Figure 8 1 is a graph illustrating the operational states of the plurality of light sources 531 , 533 , 535 , the first rotating device 521 , and the transfer unit 550 over time when there are three light sources.

[0094] In the diagram of the first rotating device 521 in graph 800, operation state 1 may refer to a state of rotation in a first rotational direction, operation state 0 may refer to a state of non-rotation, and operation state -1 may refer to a state of rotation in a second rotational direction opposite to the first rotational direction. In the diagram of the first light source 531, the second light source 533, and the third light source 535 in graph 800, operation state 1 may refer to a state of irradiation of X-rays, and operation state 0 may refer to a state of non-irradiation of X-rays. In the diagram of the transfer unit 550 in graph 800, operation state 1 may refer to a state of movement in the positive direction (+ direction) of the rotation axis, and operation state -1 may refer to a state of movement in the negative direction (- direction) of the rotation axis.

[0095] According to various embodiments, the CT apparatus 100 can use the operation method shown in the diagram 800 to obtain a spiral CT image of an object, and generate a three-dimensional image of the entire object using the obtained spiral CT image.

[0096] According to various embodiments, the processor 110 can rotate the first rotating device 521 in the first rotation direction by a rotation angle determined based on the number of the plurality of light sources 531, 533, and 535. For example, when the number of the plurality of light sources is three, the rotation angle of the first rotating device 521 can be determined to be 120 degrees. Referring to the graph of the first rotating device 521 in chart 800, the processor 110 can rotate the first rotating device 521 by 120 degrees in the first rotation direction from time t1 to time t2.

[0097] According to various embodiments, the processor 110 can control the transport unit 550 to move toward the rotation axis at a preset speed in response to the first rotating device 521 starting to rotate in the first rotation direction. Referring to the graph of the transport unit 550 in chart 800 , the processor 110 can control the transport unit 550 to move at a predetermined speed from t1 toward the positive direction of the rotation axis.

[0098] According to various embodiments, the processor 110 can irradiate an object with X-rays via at least one of the multiple light sources 531, 533, and 535 while the first rotating device 521 rotates in the first direction. The processor 110 can control the multiple light sources so that the multiple light sources 531, 533, and 535 alternately irradiate the object with X-rays in a preset order per unit angle during the rotation of the first rotating device 521 in the first direction. For example, each time the first rotating device 521 rotates 1 degree, the light source to irradiate the X-rays can be changed in a preset order.

[0099] Referring to the chart 800 for the first light source 531, the second light source 533, and the third light source 535, the processor 110 may, during the period when the first rotating device 521 rotates from 0 degrees to 1 degree in the first rotation direction, that is, from t1 to t 13 During the rotation, the first light source 531, the second light source 533 and the third light source 535 are controlled to irradiate the object with X-rays in sequence and alternately. For example, the processor 110 may control the first rotating device 521 to rotate from 0 degrees to 1 / 3 degrees in the first rotation direction, that is, from t1 to t 11 During the rotation, the first light source 531 among the plurality of light sources irradiates the object with X-rays. The processor 110 may be configured to rotate the first rotating device 521 from 1 / 3 degree to 2 / 3 degree, that is, from t 11 to t 12 During the rotation, the second light source 533 among the plurality of light sources irradiates the object with X-rays. The processor 110 may rotate the first rotating device 521 from 2 / 3 degrees to 1 degree, that is, from t 12 to t 13 , the plurality of light sources are controlled so that the third light source 535 among the plurality of light sources irradiates the object with X-rays. The processor 110 can then control the plurality of light sources so that the first light source 531, the second light source 533, and the third light source 535 alternately irradiate the object with X-rays again in the order of the first light source 531, the second light source 533, and the third light source 535. Assuming that the sequential irradiation of X-rays by the first light source 531, the second light source 533, and the third light source 535 while the first rotating device 521 rotates 1 degree in the first rotation direction is a sequence, the processor 110 can control the plurality of light sources so that the plurality of light sources alternately irradiate the object with X-rays one by one in a preset order by repeatedly executing the sequence 120 times at 1-degree intervals while the first rotating device 521 rotates from 0 to 120 degrees.

[0100] According to various embodiments, the processor 110 can detect X-rays that have penetrated the object using the detection device 540 while the first rotating device 521 rotates in the first rotational direction. In this case, the processor 110 can generate at least one low-resolution image of the object based on the X-rays detected by the detection device 540. The processor 110 can also generate a three-dimensional image of the object based on the at least one low-resolution image of the object. In this case, the three-dimensional image of the object can be a spiral computed tomography image of the object.

[0101] According to various embodiments, the processor 110 can rotate the first rotating device 521 in the first rotational direction by the determined rotational angle and then rotate the first rotating device 521 in a second rotational direction opposite to the first rotational direction by the determined rotational angle. Referring to the graph of the first rotating device 521 in chart 800 , the processor 110 can rotate the first rotating device 521 in the second rotational direction by 120 degrees from t2 to t3. In this case, the processor 110 can continue to move the conveying unit 550 at a constant speed toward the rotation axis.

[0102] According to various embodiments, the processor 110 may irradiate an object with X-rays using at least one of the multiple light sources while the first rotating device 521 rotates in the second rotational direction. The processor 110 may control the multiple light sources so that, for each unit angle of rotation of the first rotating device 521, the multiple light sources alternately irradiate the object with X-rays in a preset sequence. For example, each time the first rotating device 521 rotates 1 degree, the light source irradiating the X-rays may be changed in a preset sequence.

[0103] Referring to the chart 800 for the first light source 531, the second light source 533, and the third light source 535, the processor 110 may determine that the first rotating device 521 rotates from 120 degrees to 119 degrees in the second rotation direction, that is, from t2 to t 23 During the rotation in the second direction, the third light source 535, the second light source 533 and the first light source 531 are controlled in a manner of irradiating X-rays to the object in sequence. For example, the processor 110 may rotate the first rotating device 521 from 120 degrees to During the period of rotation in the second rotation direction, that is, from t2 to t 21 During the rotation in the second direction, the third light source 535 among the plurality of light sources irradiates the object with X-rays. Degrees rotate to degree period, that is, from t 21 to t 22 During the rotation, the second light source 533 among the plurality of light sources irradiates the object with X-rays. The processor 110 may control the plurality of light sources so that when the first rotating device 521 rotates from During the rotation from t 22 to t 23, the first light source 531 among the multiple light sources irradiates the object with X-rays. The processor 110 can then control the multiple light sources so that the third light source 535, the second light source 533, and the first light source 531 are alternately irradiated with X-rays toward the object again in the order of the third light source 535, the second light source 533, and the first light source 531. Assuming that the sequential irradiation of X-rays by the third light source 535, the second light source 533, and the first light source 531 while the first rotating device 521 rotates 1 degree in the second rotational direction is a sequence, the processor 110 can control the multiple light sources so that the multiple light sources alternately irradiate X-rays toward the object one by one in a pre-set order by repeatedly executing the sequence 120 times at 1-degree intervals while the first rotating device 521 rotates in the second rotational direction from 120 degrees to 0 degrees. In this figure, a situation is illustrated in which X-rays are irradiated to the object alternately in the order of the third light source 535, the second light source 533 and the first light source 531 while the first rotating device 521 rotates in the second rotation direction. However, it is of course also possible to irradiate the object alternately in the order of the first light source 531, the second light source 533 and the third light source 535.

[0104] According to various embodiments, the processor 110 can repeatedly execute a loop a preset number of times, including: rotating the first rotating device 521 in a first rotational direction according to a predetermined rotational angle while the transport unit 550 moves along the rotational axis at a preset speed; and rotating the first rotating device 521 in a second rotational direction according to a predetermined rotational angle while the transport unit 550 moves along the rotational axis at a preset speed. By repeatedly executing this loop a preset number of times, a spiral CT image of the subject can be obtained. The processor 110 can use the obtained spiral CT image to obtain a three-dimensional image of the entire subject.

[0105] Figure 9 FIG. 1 is a flowchart of the operation of the computed tomography apparatus 100 according to the first embodiment.

[0106] Referring to flowchart 900 , the processor 110 of the computed tomography apparatus 100 according to various embodiments may, in act 910, rotate the first rotating device 521 in a first rotational direction according to a rotational angle determined based on the number of the plurality of light sources 531 , 533 , 535 . In the first rotating device 521 , the plurality of light sources 531 , 533 , 535 may be arranged at regular intervals. The determined rotational angle may be a value obtained by dividing 360 degrees by the number of the plurality of light sources 531 , 533 , 535 . For example, when the number of the plurality of light sources 531 , 533 , 535 is three, the processor 110 may rotate the first rotating device 521 120 degrees in the first rotational direction.

[0107] According to various embodiments, in act 920, the processor 110 may cause at least one of the plurality of light sources 531, 533, and 535 to irradiate an object with X-rays while the first rotating device 521 rotates in the first rotational direction, and detect the X-rays that have penetrated the object with the detection device 540. The processor 110 may control the plurality of light sources 531, 533, and 535 so that the plurality of light sources 531, 533, and 535 alternately irradiate the object with X-rays in a predetermined order per unit angle during the rotation of the first rotating device 521 in the first rotational direction. The detection device 540 may be configured to surround the second rotating device 523. While the first rotating device 521 rotates in the first rotational direction by a predetermined rotational angle, the processor 110 may cause the second rotating device 523 to rotate in the first rotational direction by the predetermined rotational angle, or may not cause the second rotating device 523 to rotate. According to various embodiments, the processor 110 may move the transfer unit 550 carrying the object toward the rotation axis of the first rotating device 521 by a preset degree after the first rotating device 521 rotates in the first rotation direction by a determined rotation angle.

[0108] According to various embodiments, the processor 110 may, in action 930 , cause the first rotating device 521 to rotate in a second rotation direction opposite to the first rotation direction according to the determined rotation angle.

[0109] According to various embodiments, the processor 110 can, in act 940, cause at least one of the plurality of light sources 531, 533, and 535 to irradiate the object with X-rays while the first rotating device 521 rotates in the second rotational direction, and detect the X-rays that have penetrated the object with the detection device 540. The processor 110 can control the plurality of light sources 531, 533, and 535 to alternately irradiate the object with X-rays in a predetermined order per unit angle while the first rotating device 521 rotates in the second rotational direction. The processor 110 can also rotate the second rotating device 523 in the second rotational direction according to the predetermined rotational angle while the first rotating device 521 rotates in the second rotational direction according to the predetermined rotational angle, or it can prevent the second rotating device 523 from rotating. According to various embodiments, the processor 110 may move the object-carrying transfer unit 550 toward the rotation axis of the first rotating device 521 by a preset degree after the first rotating device 521 rotates in the second rotation direction by a determined rotation angle.

[0110] <Structure of the Second Embodiment>

[0111] Figures 10 to 141 and 2 are diagrams for explaining a computed tomography apparatus 100 and a computed tomography method according to a second embodiment. Details that overlap with those described in the first embodiment are omitted.

[0112] Figure 10 FIG. 1 is a cross-sectional view of the gantry of the computed tomography apparatus 100 according to the second embodiment, taken along the xy plane.

[0113] Reference Figure 10 According to various embodiments, a computed tomography apparatus 100 may include a gantry, a plurality of light sources 1031, 1033, 1035, and a plurality of detection devices 1041, 1043, 1045. The gantry may include a ring-shaped rotating device 1020 capable of rotating about a rotation axis. The plurality of light sources 1031, 1033, 1035 may be arranged on the rotating device 1020 at regular intervals. The plurality of detection devices 1041, 1043, 1045 may be arranged at positions corresponding to and facing the plurality of light sources 1031, 1033, 1035 on the rotating device 1020. The plurality of light sources 1031, 1033, 1035 may irradiate an object carried on a transfer unit 1050 with X-rays, and the plurality of detection devices 1041, 1043, 1045 may detect the X-rays that have penetrated the object. In this figure, for the convenience of explanation, the number of the plurality of light sources is assumed to be three, but the number of the plurality of light sources is not limited thereto and may be two or more than three.

[0114] According to various embodiments, the processor 110 may determine the angular intervals between the plurality of light sources 1031, 1033, and 1035 arranged within the rotating device 1020 and the angle of rotation of the rotating device 1020 based on the number of the plurality of light sources 1031, 1033, and 1035. The processor 110 may determine the angular intervals between the plurality of light sources arranged within the rotating device 1020 as a value obtained by dividing 360 degrees by the number of the plurality of light sources, and may determine the angle of rotation of the rotating device 1020 as a value obtained by dividing 360 degrees by the number of the plurality of light sources.

[0115] When the plurality of detection devices 1041, 1043, and 1045 according to various embodiments are respectively arranged at positions corresponding to and facing the plurality of light sources 1031, 1033, and 1035, even if any one of the plurality of light sources 1031, 1033, and 1035 irradiates X-rays toward an object, the processor 110 can detect the X-rays that have penetrated the object by the detection device at the corresponding position. For example, among the X-rays irradiated toward the object by the first light source 1031, the X-rays that have penetrated the object can be detected by the first detection device 1041 arranged at the corresponding position, among the X-rays irradiated toward the object by the second light source 1033, the X-rays that have penetrated the object can be detected by the second detection device 1043 arranged at the corresponding position, and among the X-rays irradiated toward the object by the third light source 1035, the X-rays that have penetrated the object can be detected by the third detection device 1045 arranged at the corresponding position.

[0116] Figure 11 : is a diagram illustrating a computed tomography method of the computed tomography apparatus 100 according to the second embodiment. Specifically, Figure 11 10 is a graph showing the operation states of the multiple light sources 1031 , 1033 , and 1035 , the rotating device 1020 , and the transfer unit 1050 over time when there are three multiple light sources.

[0117] In the diagram of the rotating device 1020 in graph 1100, operation state 1 may refer to a state of rotation in a first rotational direction, operation state 0 may refer to a state of non-rotation, and operation state -1 may refer to a state of rotation in a second rotational direction opposite to the first rotational direction. In the diagram of the first light source 1031, the second light source 1033, and the third light source 1035 in graph 1100, operation state 1 may refer to a state of irradiation of X-rays, and operation state 0 may refer to a state of non-irradiation of X-rays. In the diagram of the transport unit 1050 in graph 1100, operation state 1 may refer to a state of movement in the positive direction (+ direction) of the rotation axis, and operation state -1 may refer to a state of movement in the negative direction (- direction) of the rotation axis.

[0118] According to various embodiments, the CT apparatus 100 may use the operation method shown in the diagram 1100 to obtain a circular CT image of an object.

[0119] According to various embodiments, the processor 110 may rotate the rotating device 1020 in a first rotational direction by a rotation angle determined based on the number of the plurality of light sources. For example, when the number of the plurality of light sources is three, the rotation angle of the rotating device 1020 may be determined to be 120 degrees. Referring to the graph of the rotating device 1020 in chart 1100, the processor 110 may rotate the rotating device 1020 in the first rotational direction by 120 degrees from time t1 to time t2.

[0120] Referring to the diagram of the transport unit 1050 in FIG1100 , the processor 110 according to various embodiments may not move the transport unit 1050 in order to obtain a circular CT image of the object.

[0121] According to various embodiments, the processor 110 can irradiate X-rays toward the object through at least one of the plurality of light sources 1031, 1033, and 1035 while the rotating device 1020 rotates in the first rotational direction. For example, the processor 110 can control the plurality of light sources so that, while the rotating device 1020 rotates in the first rotational direction, the plurality of light sources 1031, 1033, and 1035 all irradiate X-rays toward the object. For example, the processor 110 can control the plurality of light sources so that, while the rotating device 1020 rotates in the first rotational direction, the plurality of light sources 1031, 1033, and 1035 alternately irradiate X-rays toward the object one by one in a preset order per unit angle.

[0122] For example, referring to the chart of the first light source 1031, the second light source 1033 and the third light source 1035 in Figure 1100, the processor 110 can use all the first light sources 1031, the second light source 1033 and the third light source 1035 to irradiate X-rays to the object during the period when the rotating device 1020 rotates from 0 degrees to 120 degrees in the first rotation direction, that is, during the rotation from t1 to t2.

[0123] For example, Figure 7As shown, the processor 110 may also control the multiple light sources so that the first light source 1031, the second light source 1033, and the third light source 1035 sequentially and alternately irradiate X-rays toward the object. Assuming that the sequential and alternating irradiation of X-rays by the first light source 1031, the second light source 1033, and the third light source 1035 during a 1-degree rotation of the first rotating device 1020 in the first rotational direction is a sequence, the processor 110 may control the multiple light sources 1031, 1033, and 1035 so that the multiple light sources 1031, 1033, and 1035 alternately irradiate X-rays toward the object in a predetermined sequence, repeating the sequence 120 times at 1-degree intervals while the first rotating device 1020 rotates from 0 to 120 degrees. According to various embodiments, the processor 110 may detect X-rays that have penetrated the object using the multiple detection devices 1041, 1043, and 1045 while the rotating device 1020 rotates in the first rotational direction. In the above case, the processor 110 can generate at least one low-resolution image of the object based on the X-rays detected by the multiple detection devices 1041, 1043, and 1045. The processor 110 can also generate a three-dimensional image of the object based on the at least one low-resolution image of the object. In the above case, the three-dimensional image of the object can be a circular computed tomography image.

[0124] Figure 12 : is a diagram illustrating a computed tomography method of the computed tomography apparatus 100 according to the second embodiment. Specifically, Figure 12 10 is a graph illustrating the operational states of the plurality of light sources 1031 , 1033 , 1035 , the first rotating device 1020 , and the transfer unit 1050 over time when there are three light sources.

[0125] According to various embodiments, the CT apparatus 100 may use the operation method shown in the diagram 1200 to obtain a spiral CT image of a subject.

[0126] According to various embodiments, the processor 110 may rotate the rotating device 1020 in a first rotational direction according to a rotation angle determined based on the number of light sources. For example, when the number of light sources is three, the processor 110 may determine the rotation angle of the rotating device 1020 to be 120 degrees. Referring to the graph of the rotating device 1020 in chart 1200, the processor 110 may rotate the first rotating device 1020 in the first rotational direction by 120 degrees from t1 to t2.

[0127] According to various embodiments, the processor 110 can control the transfer unit 1050 to move in the direction of the rotation axis by a preset distance within a preset time in response to the rotation device 1020 starting to rotate in the first rotation direction. Referring to the graph for the transfer unit 1050 in chart 1200, the processor 110 can control the transfer unit 1050 to move in the positive direction of the rotation axis by a preset distance from t1 to t2.

[0128] According to various embodiments, the processor 110 can irradiate X-rays toward the object using one of the multiple light sources 1031, 1033, and 1035 while the rotating device 1020 rotates in the first rotational direction. The processor 110 can also irradiate X-rays toward the object using the first light source 1031 while the rotating device 1020 rotates in the first rotational direction from t1 to t2. In this case, the second light source 1033 and the third light source 1035 may not irradiate X-rays. While the first light source 1031 is irradiating X-rays, the first detection device 1041, positioned opposite to the first light source 1031, can detect the X-rays that have penetrated the object. The processor 110 can generate at least one low-resolution image of the object based on the X-rays detected by the first detection device 1041.

[0129] According to various embodiments, the processor 110 can rotate the rotating device 1020 in a second rotational direction opposite to the first rotational direction. After the rotating device 1020 rotates in the first rotational direction by a determined rotational angle, the processor 110 can control the rotating device 1020 to rotate in the second rotational direction by the determined rotational angle. Referring to the graph 1200 for the rotating device 1020, the processor 110 can rotate the first rotating device 1020 by 120 degrees in the second rotational direction from t2 to t3. In other words, the processor 110 can return the position of the first rotating device 1020 to the state before the rotation in the first rotational direction.

[0130] According to various embodiments, the processor 110 may control the transfer unit 1050 to stop without moving in response to the rotation device 1020 starting to rotate in the second rotation direction. Referring to the graph of the transfer unit 1050 in the graph 1200 , the processor 110 may control the transfer unit 1050 to not move from t2 to t3.

[0131] According to various embodiments, the processor 110 can control the plurality of light sources 1031, 1033, and 1035 so that none of them emits X-rays while the rotating device 1020 rotates in the second rotational direction. Referring to the chart 1200 for the first light source 1031, the second light source 1033, and the third light source 1035, the processor 110 can control the plurality of light sources 1031, 1033, and 1035 so that none of them emits X-rays from t2 to t3.

[0132] According to various embodiments, the processor 110 may repeatedly execute the operation of rotating the rotating device 1020 in a first rotation direction according to a determined rotation angle and then in a second rotation direction according to a determined rotation angle, at a degree equal to the number of the plurality of light sources.

[0133] According to various embodiments, the processor 110 may rotate the rotating device 1020 again toward the first rotation direction according to the determined rotation angle. Referring to the diagram of the rotating device 1020 in chart 1200, the processor 110 may rotate the first rotating device 1020 again toward the first rotation direction by 120 degrees from t3 to t4.

[0134] According to various embodiments, the processor 110 can control the transfer unit 1050 to move in the direction of the rotation axis by a preset distance within a preset time in response to the rotation device 1020 resuming rotation in the first rotation direction. Referring to the graph of the transfer unit 1050 in chart 1200, the processor 110 can control the transfer unit 1050 to move in the positive direction of the rotation axis by a preset distance from t3 to t4.

[0135] According to various embodiments, the processor 110 can irradiate X-rays toward the object using one of the multiple light sources 1031, 1033, and 1035 while the rotating device 1020 rotates in the first rotational direction. The processor 110 can also irradiate X-rays toward the object using the second light source 1033 while the first rotating device 1020 rotates in the first rotational direction from t3 to t4. For example, the second light source 1033 can be the light source located closest to the first light source 1031 in the first rotational direction. In this case, the first light source 1031 and the third light source 1035 may not irradiate X-rays. While the second light source 1033 is irradiating X-rays, the second detection device 1043, positioned opposite to the second light source 1033, can detect the X-rays that have penetrated the object. The processor 110 can generate at least one low-resolution image of the object based on the X-rays detected by the second detection device 1043.

[0136] According to various embodiments, the processor 110 can rotate the rotating device 1020 again in a second rotation direction opposite to the first rotation direction. Referring to the diagram of the rotating device 1020 in chart 1200, the processor 110 can rotate the first rotating device 1020 again in the second rotation direction by 120 degrees from t4 to t5.

[0137] According to various embodiments, the processor 110 may control the transfer unit 1050 to stop without moving in response to the rotation device 1020 resuming rotation in the second rotation direction. Referring to the graph of the transfer unit 1050 in the graph 1200, the processor 110 may control the transfer unit 1050 to not move from t4 to t5.

[0138] According to various embodiments, the processor 110 may control the plurality of light sources 1031, 1033, and 1035 so that none of them emit X-rays while the rotating device 1020 rotates again in the second rotational direction. Referring to the chart 1200 for the first light source 1031, the second light source 1033, and the third light source 1035, the processor 110 may control the plurality of light sources 1031, 1033, and 1035 so that none of them emit X-rays from t4 to t5.

[0139] According to various embodiments, the processor 110 may repeatedly rotate the rotating device 1020 in the first rotational direction and then in the second rotational direction from t5 to t7. The processor 110 may utilize the third light source 1035 of the plurality of light sources to irradiate the object with X-rays while the first rotating device 1020 rotates in the first rotational direction from t5 to t6.

[0140] Through the above actions, the processor can generate at least one low-resolution image of the object, and can generate a spiral computed tomography image of the object based on the at least one low-resolution image.

[0141] Figure 13 : is a diagram illustrating a computed tomography method of the computed tomography apparatus 100 according to the second embodiment. Specifically, Figure 13 10 is a graph illustrating the operational states of the plurality of light sources 1031 , 1033 , 1035 , the first rotating device 1020 , and the transfer unit 1050 over time when there are three light sources.

[0142] According to various embodiments, the CT apparatus 100 can use the operation method shown in the diagram 1300 to obtain a spiral CT image of an object, and can use the obtained spiral CT image to generate a three-dimensional image of the entire object. Figure 12 The content described in the content is repeated.

[0143] According to various embodiments, from t1 to t7, the operating states of the rotating device 1020, the first light source 1031, the second light source 1033 and the third light source 1035 are the same as those of Figure 12 The same. Referring to the diagram 1300 showing the rotation device 1020, the first light source 1031, the second light source 1033, and the third light source 1035, the processor 110 can control the rotation device 1020 to repeatedly rotate in a first rotational direction and then in a second rotational direction according to a determined rotation angle. The processor 110 can irradiate the object with X-rays using one of the plurality of light sources 1031, 1033, and 1035 while the rotation device 1020 rotates in the first rotational direction. For example, as shown in FIG1300 , the processor 110 can control the plurality of light sources to irradiate the object with X-rays in the order of the first light source 1031, the second light source 1033, and the third light source 1035.

[0144] Referring to the diagram of the transfer unit 1050 in Table 1300, the processor 110 according to various embodiments can control the transfer unit 1050 to move in a certain manner in the positive direction of the rotation axis at a preset speed from t1 to t7. During the period when the rotating device 1020 rotates in the second rotation direction, that is, during the period when the rotating device 1020 returns to the original position, if the transfer unit 1050 is not stopped, a portion of data may be missed in the spiral CT image of the object. In order to supplement the missed data, the processor 110 can move the transfer unit 1050 again in the negative direction of the rotation axis at a preset speed. For example, the processor 110 can control the transfer unit 1050 to move in a certain manner in the positive direction of the rotation axis at a preset speed from t7 to t7. 13 The conveying unit 1050 is controlled to move in the negative direction of the rotation axis at a constant speed set in advance.

[0145] Referring to the chart 1300 of the rotating device 1020, the first light source 1031, the second light source 1033, and the third light source 1035, the processor 110 may cause the rotating device 1020 to rotate from t7 to t 13 The rotating device 1020 is controlled so as to repeatedly rotate in the first rotation direction and then in the second rotation direction according to the determined rotation angle. The processor 110 may irradiate the object with X-rays using one of the plurality of light sources 1031, 1033, and 1035 while the rotating device 1020 rotates in the first rotation direction. For example, as shown in FIG1300, the processor 110 may control the third light source 1035, the second light source 1033, and the first light source 1031 from t7 to t 13 Multiple light sources are controlled to sequentially irradiate an object with X-rays.

[0146] Through the above actions, the processor can generate at least one low-resolution image of the object, and can generate a spiral computed tomography image of the object based on the at least one low-resolution image.

[0147] Figure 14 FIG. 1 is an operation flow chart of the computed tomography apparatus 100 having the structure of the second embodiment.

[0148] Referring to the action flow chart 1400 , the processor 110 of the computed tomography apparatus 100 according to various embodiments may, in action 1410 , rotate the rotating device 1020 in a first direction according to a rotation angle determined based on the number of the plurality of light sources 1031 , 1033 , and 1035 .

[0149] According to various embodiments, in act 1420, the processor 110 may irradiate an object with X-rays using at least one of the plurality of light sources 1031, 1033, and 1035 while the rotating device 1020 rotates in a first rotational direction, and detect the X-rays that have penetrated the object using one of the plurality of detection devices 1041, 1043, and 1045. The processor 110 may generate at least one low-resolution image of the object based on the X-rays detected by one of the plurality of detection devices 1041, 1043, and 1045. The processor 110 may generate a three-dimensional image of the object using the at least one low-resolution image of the object.

[0150] According to various embodiments, the processor 110 may rotate the rotating device 1020 in a second rotational direction according to the determined rotation angle in Act 1430. The processor 110 may control the plurality of light sources 1031, 1033, and 1035 so that none of them emits X-rays while the rotating device 1020 rotates in the second rotational direction according to the determined rotation angle.

[0151] <Structure of the Third Embodiment>

[0152] Figures 15a to 16 1 and 2 are diagrams for explaining a computed tomography apparatus 100 and a computed tomography method thereof according to a third embodiment. Details overlapping with those described in the second embodiment are omitted.

[0153] Figure 15a is a cross-sectional view of the scanning frame of the computed tomography apparatus 100 according to the third embodiment, taken along an xy plane. Figure 15b 2 is a yz-plane cross-sectional view of a gantry according to the third embodiment. The computed tomography apparatus 100 according to the third embodiment is obtained by modifying the z-axis arrangement positions of the plurality of light sources in the computed tomography apparatus 100 according to the second embodiment.

[0154] Reference Figure 15a According to various embodiments, a computed tomography apparatus 100 may include a gantry, multiple light sources 1531, 1533, 1535, and multiple detection devices 1541, 1543, 1545. The gantry may include a ring-shaped rotating device 1520 that is rotatable about a rotation axis. The multiple light sources 1531, 1533, 1535 may be arranged at regular intervals on the rotating device 1520. The multiple detection devices 1541, 1543, 1545 may be arranged at positions corresponding to and facing the multiple light sources 1531, 1533, 1535. The multiple light sources 1531, 1533, 1535 may irradiate an object carried on a transport unit 1550 with X-rays, and the multiple detection devices 1541, 1543, 1545 may detect the X-rays that have penetrated the object. For ease of explanation, this figure assumes that the number of the multiple light sources is three, but the number is not limited to this and may also be two or more than three.

[0155] According to various embodiments, the processor 110 may determine the angular intervals between the plurality of light sources 1531, 1533, 1535 arranged within the rotating device 1520 and the angle of rotation of the rotating device 1520 based on the number of the plurality of light sources 1531, 1533, 1535. The processor 110 may determine the angular intervals between the plurality of light sources 1531, 1533, 1535 arranged within the rotating device 1520 as a value obtained by dividing 360 degrees by the number of the plurality of light sources, and may determine the angle of rotation of the rotating device 1520 as a value obtained by dividing 360 degrees by the number of the plurality of light sources.

[0156] When the plurality of detection devices 1541, 1543, and 1545 according to various embodiments are respectively arranged at positions corresponding to and facing the plurality of light sources 1531, 1533, and 1535, even if any one of the plurality of light sources 1531, 1533, and 1535 irradiates X-rays toward an object, the processor 110 can detect the X-rays that have penetrated the object by the detection device at the corresponding position. For example, among the X-rays irradiated toward the object by the first light source 1531, the X-rays that have penetrated the object can be detected by the first detection device 1541 arranged at the corresponding position, among the X-rays irradiated toward the object by the second light source 1533, the X-rays that have penetrated the object can be detected by the second detection device 1543 arranged at the corresponding position, and among the X-rays irradiated toward the object by the third light source 1535, the X-rays that have penetrated the object can be detected by the third detection device 1545 arranged at the corresponding position.

[0157] Reference Figure 15bAccording to various embodiments, the positions of the plurality of light sources 1531, 1533, and 1535 on the rotation axis of the rotating device 1520 can be spaced apart on the rotating device 1520. For example, the positions of the plurality of light sources 1531, 1533, and 1535 on the z-axis can be different from one another. For example, the z-axis position of the first light source 1531, the z-axis position of the second light source 1533, and the z-axis position of the third light source 1535 can be different from one another. For example, the difference between the z-axis position of the first light source 1531 and the z-axis position of the second light source 1533 can be the same as the difference between the z-axis position of the second light source 1533 and the z-axis position of the third light source 1535.

[0158] Figure 16 : is a diagram illustrating a computer tomography method of the computer tomography apparatus 100 according to the third embodiment. Specifically, Figure 16 15 is a graph showing the operation states of the multiple light sources 1531 , 1533 , and 1535 , the rotating device 1520 , and the transfer unit 1550 over time when there are three multiple light sources.

[0159] In the diagram of the rotating device 1520 in graph 1600, operation state 1 may refer to a state of rotation in a first rotational direction, operation state 0 may refer to a state of non-rotation, and operation state -1 may refer to a state of rotation in a second rotational direction opposite to the first rotational direction. In the diagram of the first light source 1531, the second light source 1533, and the third light source 1535 in graph 1100, operation state 1 may refer to a state of irradiation of X-rays, and operation state 0 may refer to a state of non-irradiation of X-rays. In the diagram of the transfer unit 1550 in graph 1100, operation state 1 may refer to a state of movement in the positive direction (+ direction) of the rotation axis, and operation state -1 may refer to a state of movement in the negative direction (- direction) of the rotation axis.

[0160] According to various embodiments, the CT apparatus 100 may use the operation method shown in the diagram 1600 to obtain a spiral CT image of a subject.

[0161] According to various embodiments, the processor 110 may rotate the rotating device 1520 in the first rotational direction according to a rotation angle determined based on the number of the plurality of light sources. For example, when the number of the plurality of light sources is three, the rotation angle of the rotating device 1520 may be determined to be 120 degrees. Referring to the graph of the rotating device 1520 in chart 1600, the processor 110 may rotate the rotating device 1520 in the first rotational direction by 120 degrees from t1 to t2.

[0162] Referring to the diagram of the transport unit 1550 in FIG1600 , the processor 110 according to various embodiments can move the transport unit 1550 in the direction of the rotation axis at a preset speed from time t1 to time t2 to obtain a spiral CT image of the object. The CT apparatus 100 according to the third embodiment has multiple light sources positioned at different positions on the z-axis. Therefore, even while the rotating device 1520 is rotating in the first rotational direction, the transport unit 1550 can be moved to obtain a spiral CT image of the object.

[0163] According to various embodiments, the processor 110 can irradiate X-rays toward the object through at least one of the plurality of light sources 1531, 1533, and 1535 while the rotating device 1520 rotates in the first rotational direction. For example, the processor 110 can control the plurality of light sources so that, while the rotating device 1520 rotates in the first rotational direction, the plurality of light sources 1531, 1533, and 1535 all irradiate X-rays toward the object. For example, the processor 110 can control the plurality of light sources so that, while the rotating device 1520 rotates in the first rotational direction, the plurality of light sources 1531, 1533, and 1535 alternately irradiate X-rays toward the object one by one in a preset order per unit angle.

[0164] For example, referring to the chart of the first light source 1531, the second light source 1533 and the third light source 1535 in Figure 1600, the processor 110 can use the first light source 1531, the second light source 1533 and the third light source 1535 to irradiate X-rays to the object during the period when the rotating device 1520 rotates from 0 degrees to 120 degrees in the first rotation direction, that is, during the rotation from t1 to t2.

[0165] For example, Figure 7 As shown, the processor 110 may also control the multiple light sources so that the first light source 1531, the second light source 1533, and the third light source 1535 sequentially and alternately irradiate the object with X-rays. Assuming that the sequential irradiation of X-rays by the first light source 1531, the second light source 1533, and the third light source 1535 during a 1-degree rotation of the first rotating device 1020 in the first rotation direction is a sequence, the processor 110 may control the multiple light sources so that the multiple light sources alternately irradiate the object with X-rays in a predetermined sequence by repeating the sequence 120 times at 1-degree intervals while the first rotating device 1520 rotates from 0 to 120 degrees.

[0166] According to various embodiments, the processor 110 can detect X-rays penetrating the object using the multiple detection devices 1541, 1543, and 1545 while the rotation device 1520 rotates in the first rotation direction. In this case, the processor 110 can generate at least one low-resolution image of the object based on the X-rays detected by the multiple detection devices 1541, 1543, and 1545. The processor 110 can also generate a three-dimensional image of the object based on the at least one low-resolution image of the object. In this case, the three-dimensional image of the object can be a spiral computed tomography image.

[0167] According to various embodiments, processor 110 can rotate rotating device 1520 in the second rotational direction according to the determined rotation angle. In other words, processor 110 can return the position of rotating device 1520 to the state before rotating in the first rotational direction. Referring to the graph of rotating device 1520 in chart 1600 , processor 110 can rotate rotating device 1520 by 120 degrees in the second rotational direction from time t2 to time t3.

[0168] <Structure of the Fourth Embodiment>

[0169] Figures 17 to 21 1 is a diagram for explaining a computed tomography apparatus 100 having a structure according to a fourth embodiment and a computed tomography method thereof.

[0170] Figure 17 1 is a diagram illustrating an xy plane view of a gantry of a computed tomography apparatus 100 according to a configuration of a fourth embodiment.

[0171] Reference Figure 17 According to various embodiments, a computed tomography apparatus 100 may include a gantry, a plurality of light sources 1731, 1733, 1735, and 1737, and a detection device 1740. The gantry may include a ring-shaped rotating device 1720 capable of rotating about a rotation axis. The gantry may be separated into a first portion 1721 and a second portion 1723 along a separation line X. In this case, after an object is positioned within the first portion 1721 of the gantry's rotating device 1720, the object may be joined to the second portion 1723, thereby facilitating its placement within the gantry. For ease of illustration, the rotating device 1720 is described as being split in half along the separation line X. However, the first portion 1721 and the second portion 1723 do not necessarily need to be separated 180 degrees from the center of the rotating device 1720, and may be separated into various sizes. When the first device 1721 is combined with the second device 1723 , the first device 1721 and the second device 1723 can rotate together with the rotation of the rotating device 1720 .

[0172] According to various embodiments, multiple light sources 1731, 1733, 1735, and 1737 can be spaced apart and arranged in the first device 1721. These multiple light sources can irradiate an object carried on the transport unit 1750 with X-rays. In this figure, for ease of explanation, the multiple light sources are assumed to be four, but the number is not limited to this and can also be two, three, or even more than four.

[0173] According to various embodiments, the detection device 1740 can be disposed within the second device portion 1723. For example, assuming the light source is a point light source, the light source's illumination angle (cone beam angle) is approximately 30 degrees. Therefore, the second device portion 1723 can occupy 210 degrees (180 degrees + 30 degrees) relative to the center of the rotating device 1720. The detection device 1740 can be configured to completely surround the inner side surface of the second device portion 1723.

[0174] According to various embodiments, processor 110 may determine, based on the number of light sources, the angular intervals between the light sources 1731, 1733, 1735, and 1737 within first device 1721 and the rotation angle of rotation device 1720. Processor 110 may determine the angular intervals between the light sources 1733, 1735, and 1737 within first device 1721 as a value obtained by dividing 180 degrees by the number of light sources, and may determine the rotation angle of rotation device 1720 as a value obtained by dividing 180 degrees by the number of light sources. For example, when there are four light sources, the light sources may be arranged at 45-degree intervals within first device 1721, and the rotation angle of rotation device 1720 may be determined to be 45 degrees.

[0175] When the detection device 1740 according to various embodiments is constructed in a form that entirely surrounds the second portion device 1723 , even if any one of the multiple light sources configured in the first portion device 1721 irradiates X-rays toward the object, the processor 110 can also detect the X-rays that penetrate the object through the detection device 1740 .

[0176] Figure 18 : is a diagram illustrating a computed tomography method of the computed tomography apparatus 100 according to the fourth embodiment. Specifically, Figure 18 17 is a graph showing the operation states of the plurality of light sources 1731 , 1733 , 1735 , 1737 , the rotating device 1720 , and the transfer unit 1750 over time when the number of the plurality of light sources is four.

[0177] In the diagram for the rotating device 1720 in graph 1800, operation state 1 may refer to a state of rotation in a first rotational direction, operation state 0 may refer to a state of non-rotation, and operation state -1 may refer to a state of rotation in a second rotational direction opposite to the first rotational direction. In the diagram for the first light source 1731, the second light source 1733, the third light source 1737, and the fourth light source 1737 in graph 1800, operation state 1 may refer to a state of irradiation of X-rays, and operation state 0 may refer to a state of non-irradiation of X-rays. In the diagram for the transport unit 1750 in graph 1800, operation state 1 may refer to a state of movement in the positive direction (+ direction) of the rotation axis, and operation state -1 may refer to a state of movement in the negative direction (- direction) of the rotation axis.

[0178] According to various embodiments, the CT apparatus 100 may use the operation method shown in the diagram 1800 to obtain a circular CT image of an object.

[0179] According to various embodiments, the CT apparatus 100 may use the operation method shown in the diagram 1800 to obtain a circular CT image of an object.

[0180] According to various embodiments, the processor 110 may rotate the rotating device 1720 in the first rotational direction according to a rotation angle determined based on the number of the plurality of light sources. For example, when the number of the plurality of light sources is four, the rotation angle of the rotating device 1720 may be determined to be 45 degrees. Referring to the diagram of the rotating device 1720 in chart 1800, the processor 110 may rotate the rotating device 1720 in the first rotational direction by 45 degrees from t1 to t2.

[0181] Referring to the diagram of the transport unit 1750 in FIG1800 , the processor 110 according to various embodiments may not move the transport unit 1750 in order to obtain a circular CT image of the object.

[0182] According to various embodiments, the processor 110 may irradiate an object with X-rays through at least one of the plurality of light sources 1731, 1733, 1735, and 1737 while the rotating device 1720 rotates in the first rotational direction. For example, the processor 110 may control the plurality of light sources 1731, 1733, 1735, and 1737 so that each of the plurality of light sources 1731, 1733, 1735, and 1737 irradiates the object with X-rays while the rotating device 1720 rotates in the first rotational direction. For example, the processor 110 may control the plurality of light sources so that each of the plurality of light sources 1731, 1733, 1735, and 1737 repeatedly irradiates the object with X-rays in a sequence alternately set in a preset order per unit angle while the rotating device 1720 rotates in the first rotational direction.

[0183] For example, referring to the chart of the first light source 1731, the second light source 1733, the third light source 1735 and the fourth light source 1737 in Figure 1800, the processor 110 can use the first light source 1731, the second light source 1733, the third light source 1735 and the fourth light source 1737 to irradiate X-rays to the object during the period when the rotating device 1720 rotates from 0 degrees to 45 degrees in the first rotation direction, that is, during the rotation from t1 to t2.

[0184] For example, Figure 7 As shown in the figure, the processor 110 can also control multiple light sources 1731, 1733, 1735, and 1737 in a manner of repeatedly executing a sequence of irradiating X-rays to the object one by one in the order of the first light source 1731, the second light source 1733, the third light source 1735, and the fourth light source 1737 per unit angle.

[0185] According to various embodiments, the processor 110 may detect X-rays penetrating the object using the detection device 1740 while the rotation device 1720 rotates in the first rotation direction. In this case, the processor 110 may generate at least one low-resolution image of the object based on the X-rays detected by the detection device 1740. The processor 110 may also generate a three-dimensional image of the object based on the at least one low-resolution image of the object. In this case, the three-dimensional image of the object may be a circular computed tomography image.

[0186] According to various embodiments, processor 110 can rotate rotating device 1720 in the second rotational direction according to the determined rotation angle. In other words, processor 110 can return rotating device 1720 to its original position prior to rotation in the first rotational direction. Referring to the diagram of rotating device 1720 in graph 1800 , processor 110 can rotate rotating device 1720 by 45 degrees in the second rotational direction from t2 to t3.

[0187] Figure 19 : is a diagram illustrating a computed tomography method of the computed tomography apparatus 100 according to the fourth embodiment. Specifically, Figure 19 17 is a graph showing the operation states of the plurality of light sources 1731 , 1733 , 1735 , 1737 , the rotating device 1720 , and the transfer unit 1750 over time when the number of the plurality of light sources is four.

[0188] According to various embodiments, the CT apparatus 100 may use the operation method shown in the diagram 1900 to obtain a spiral CT image of a subject.

[0189] According to various embodiments, the processor 110 may rotate the rotating device 1720 in the first rotational direction according to a rotation angle determined based on the number of the plurality of light sources. For example, when the number of the plurality of light sources is four, the rotation angle of the rotating device 1720 may be determined to be 45 degrees. Referring to the diagram of the rotating device 1720 in chart 1900, the processor 110 may rotate the first rotating device 1720 in the first rotational direction by 45 degrees from t1 to t2.

[0190] According to various embodiments, the processor 110 can control the transfer unit 1750 to move in the direction of the rotation axis by a preset distance within a preset time in response to the rotation device 1720 starting to rotate in the first rotation direction. Referring to the graph of the transfer unit 1750 in FIG1900 , the processor 110 can control the transfer unit 1750 to move in the positive direction of the rotation axis by a preset distance from t1 to t2.

[0191] According to various embodiments, the processor 110 may irradiate the object with X-rays using one of the plurality of light sources 1731, 1733, 1735, and 1737 while the rotating device 1720 rotates in the first rotational direction. The processor 110 may irradiate the object with X-rays using the first light source 1731 while the rotating device 1720 rotates in the first rotational direction from t1 to t2. In this case, the second light source 1733, the third light source 1735, and the fourth light source 1737 may not irradiate X-rays. While the first light source 1731 irradiates X-rays, the detection device 1740 may detect the X-rays that have penetrated the object. The processor 110 may generate at least one low-resolution image of the object based on the X-rays detected by the detection device 1740.

[0192] According to various embodiments, the processor 110 can rotate the rotating device 1720 in a second rotational direction opposite to the first rotational direction. The processor 110 can control the rotating device 1720 so that after rotating the rotating device 1720 in the first rotational direction by a predetermined rotational angle, it is then rotated in the second rotational direction by a predetermined rotational angle. Referring to the graph of the rotating device 1720 in chart 1900 , the processor 110 can rotate the first rotating device 1720 by 45 degrees in the second rotational direction from t2 to t3. In other words, the processor 110 can return the position of the first rotating device 1720 to its original position before the rotation in the first rotational direction.

[0193] According to various embodiments, the processor 110 may control the conveyor 1750 to stop without moving in response to the rotation of the rotating device 1720 in the second rotation direction. Referring to the graph of the conveyor 1750 in the graph 1900 , the processor 110 may control the conveyor 1750 to not move from t2 to t3.

[0194] According to various embodiments, the processor 110 may control the plurality of light sources 1731, 1733, 1735, and 1737 so that none of them emits X-rays while the rotating device 1720 rotates in the second rotational direction. Referring to the chart 1900 for the first light source 1731, the second light source 1733, the third light source 1735, and the fourth light source 1737, the processor 110 may control the plurality of light sources 1731, 1733, and 1735 so that none of them emits X-rays from t2 to t3.

[0195] According to various embodiments, the processor 110 may repeatedly execute the operation of rotating the rotating device 1720 in a first rotation direction according to a determined rotation angle and then in a second rotation direction according to a determined rotation angle according to the number of the plurality of light sources.

[0196] According to various embodiments, the processor 110 may rotate the rotating device 1720 again toward the first rotation direction according to the determined rotation angle. Referring to the diagram of the rotating device 1720 in chart 1900, the processor 110 may rotate the first rotating device 1720 again toward the first rotation direction by 45 degrees from t3 to t4.

[0197] According to various embodiments, the processor 110 can control the transfer unit 1750 to move in the direction of the rotation axis by a preset distance within a preset time in response to the rotation device 1720 resuming rotation in the first rotation direction. Referring to the graph of the transfer unit 1750 in chart 1900, the processor 110 can control the transfer unit 1750 to move in the positive direction of the rotation axis by a preset distance from t3 to t4.

[0198] According to various embodiments, the processor 110 may irradiate the object with X-rays using one of the plurality of light sources 1731, 1733, 1735, and 1737 while the rotating device 1720 rotates in the first rotational direction. The processor 110 may also irradiate the object with X-rays using the second light source 1733 while the rotating device 1720 rotates in the first rotational direction from t3 to t4. For example, the second light source 1733 may be the light source closest to the first light source 1731 in the first rotational direction. In this case, the first light source 1731, the third light source 1735, and the fourth light source 1737 may not irradiate X-rays. While the second light source 1733 irradiates X-rays, the detection device 1740 may detect the X-rays that have penetrated the object. The processor 110 may generate at least one low-resolution image of the object based on the X-rays detected by the detection device 1740.

[0199] According to various embodiments, the processor 110 may rotate the rotating device 1720 again in a second rotation direction opposite to the first rotation direction. Referring to the diagram of the rotating device 1720 in chart 1900 , the processor 110 may rotate the first rotating device 1720 again in the second rotation direction by 45 degrees from t4 to t5.

[0200] According to various embodiments, the processor 110 may control the conveyor 1750 to stop without moving in response to the rotation device 1720 resuming rotation in the second rotation direction. Referring to the graph of the conveyor 1750 in the graph 1900, the processor 110 may control the conveyor 1750 to not move from t4 to t5.

[0201] According to various embodiments, the processor 110 may control the plurality of light sources 1731, 1733, 1735, and 1737 so that none of them emits X-rays while the rotating device 1720 rotates again in the second rotational direction. Referring to the chart 1900 for the first light source 1731, the second light source 1733, the third light source 1735, and the fourth light source 1737, the processor 110 may control the plurality of light sources 1731, 1733, 1735, and 1737 so that none of them emits X-rays from t4 to t5.

[0202] According to various embodiments, the processor 110 may repeat the operation of rotating the rotating device 1720 twice, rotating in the first rotational direction and then in the second rotational direction from t5 to t9. The processor 110 may utilize a third light source 1735 among the multiple light sources to irradiate the object with X-rays while the rotating device 1720 rotates in the first rotational direction from t5 to t6. The processor 110 may utilize a fourth light source 1737 among the multiple light sources to irradiate the object with X-rays while the rotating device 1720 rotates in the first rotational direction from t7 to t8.

[0203] Through the above actions, the processor can generate at least one low-resolution image of the object, and can generate a spiral computed tomography image of the object based on the at least one low-resolution image.

[0204] Figure 20 : is a diagram illustrating a computed tomography method of the computed tomography apparatus 100 according to the fourth embodiment. Specifically, Figure 20 17 is a graph showing the operation states of the plurality of light sources 1731 , 1733 , 1735 , 1737 , the rotating device 1720 , and the transfer unit 1750 over time when the number of the plurality of light sources is four.

[0205] According to various embodiments, the CT apparatus 100 can use the operation method shown in the diagram 1300 to obtain a spiral CT image of an object, and can use the obtained spiral CT image to generate a three-dimensional image of the entire object. Figure 19 The content described in the content is repeated.

[0206] According to various embodiments, from t1 to t9, the operating states of the rotating device 1720, the first light source 1731, the second light source 1733, the third light source 1735, and the fourth light source 1737 are the same as those of the first light source 1731, the second light source 1733, the third light source 1735, and the fourth light source 1737. Figure 19 Referring to the diagram of the rotating device 1720, the first light source 1731, the second light source 1733, the third light source 1735, and the fourth light source 1737 in FIG2000, the processor 110 can control the rotating device 1720 so that the rotating device 1720 repeatedly rotates in a first rotational direction and then in a second rotational direction according to a determined rotation angle. The processor 110 can irradiate the object with X-rays using one of the plurality of light sources 1731, 1733, 1735, and 1737 while the rotating device 1720 rotates in the first rotational direction. For example, as shown in FIG2000, the processor 110 can control the plurality of light sources 1731, 1733, 1735, and 1737 so that the first light source 1731, the second light source 1733, the third light source 1735, and the fourth light source 1737 sequentially irradiate the object with X-rays.

[0207] Referring to the diagram of the transfer unit 1750 in FIG2000, the processor 110 according to various embodiments can control the transfer unit 1750 to move in a certain manner in the positive direction of the rotation axis at a preset speed from t1 to t9. During the period when the rotating device 1720 rotates in the second rotation direction, that is, during the period when the rotating device 1720 returns to the original position, if the transfer unit 1750 is not stopped, a portion of data may be missed in the spiral CT image of the object. In order to supplement the missed data, the processor 110 can move the transfer unit 1750 again in the negative direction of the rotation axis at a preset speed. For example, the processor 110 can control the transfer unit 1750 to move in a certain manner in the positive direction of the rotation axis at a preset speed from t9 to t9. 17 The conveying unit 1750 is controlled to move in the negative direction of the rotation axis at a constant speed set in advance.

[0208] Referring to the chart of the rotating device 1720, the first light source 1731, the second light source 1733, the third light source 1735, and the fourth light source 1737 in the chart 2000, the processor 110 may 17 The rotating device 1720 is controlled so that it repeatedly rotates in a first rotational direction and then in a second rotational direction according to the determined rotation angle. While the rotating device 1720 rotates in the first rotational direction, the processor 110 may irradiate the object with X-rays using one of the plurality of light sources 1731, 1733, 1735, and 1737. For example, as shown in FIG. 2000 , the processor 110 may control the plurality of light sources 1731, 1735, 1733, and 1737 so that the fourth light source 1737, the third light source 1735, the second light source 1733, and the first light source 1731 sequentially irradiate the object with X-rays.

[0209] Through the above actions, the processor can generate at least one low-resolution image of the object, and can generate a spiral computed tomography image of the object based on the at least one low-resolution image.

[0210] Figure 21 FIG. 1 is an operation flow chart of the computed tomography apparatus 100 having the structure of the fourth embodiment.

[0211] Referring to the action flow chart 2100 , the processor 110 of the computed tomography apparatus 100 according to various embodiments may, in action 2110 , rotate the rotating device 1720 in a first rotation direction according to a rotation angle determined based on the number of the plurality of light sources.

[0212] According to various embodiments, the processor 110 may, in action 2120 , irradiate X-rays to the object through at least one of the plurality of light sources 1731 , 1733 , 1735 , and 1737 while the rotating device 1720 rotates in the first rotation direction.

[0213] According to various embodiments, the processor 110 may, in action 2130, detect X-rays that have penetrated the object using the detection device 1740 while the rotation device 1720 rotates in the first rotation direction. The processor 110 may generate at least one low-resolution image of the object based on the X-rays detected by the detection device 1740. The processor 110 may generate a three-dimensional image of the object using the at least one low-resolution image of the object.

[0214] According to various embodiments, the processor 110 may rotate the rotating device 1720 in a second rotational direction according to the determined rotation angle in Act 2140. The processor 110 may control the plurality of light sources 1731, 1733, 1735, and 1737 so that none of them emits X-rays while the rotating device 1720 rotates in the second rotational direction according to the determined rotation angle.

[0215] <Structure of the Fifth Embodiment>

[0216] Figures 22 to 26 1 and 2 are diagrams for explaining a computed tomography apparatus 100 and a computed tomography method thereof according to a fifth embodiment. Details overlapping with those described in other embodiments are omitted.

[0217] Figure 22 FIG. 1 is a cross-sectional view of the gantry of the computed tomography apparatus 100 according to the fifth embodiment, taken along the xy plane.

[0218] Reference Figure 22 According to various embodiments, a computed tomography apparatus 100 may include a gantry, a plurality of light sources 2231, 2233, 2235, and a detection device 2240. The gantry may include a first rotating device 2221 and a second rotating device 2223 in a ring shape that share a common rotation axis and can rotate independently of each other. The plurality of light sources 2231, 2233, 2235 may be arranged at regular intervals on the first rotating device 2221. The plurality of light sources 2231, 2233, 2235 may irradiate an object carried on a transport portion 2250 with X-rays. In this figure, for ease of explanation, the number of the plurality of light sources is assumed to be three, but the number of the plurality of light sources is not limited thereto and may also be two or more than three.

[0219] According to various embodiments, a detection device 2240 can be disposed in an area of the second rotating device 2223. The detection device 2240 can detect X-rays that penetrate a subject. The initial position of the second rotating device 2223 can be set to a position where the detection device 2240 can correspond to and face a specific light source among the multiple light sources 2231, 2233, and 2235 that is configured to initially irradiate X-rays. For example, when the initial setting is that the first light source 2231 among the multiple light sources 2231, 2233, and 2235 is configured to initially irradiate X-rays, the processor 110 can set the position where the detection device 2240 can correspond to and face the first light source 2231 as the initial position of the second rotating device 2223.

[0220] Figure 23 : is a diagram illustrating a computer tomography method of the computer tomography apparatus 100 according to the structure of the fifth embodiment. Specifically, Figure 23 1 is a graph illustrating the operational states of the plurality of light sources 2231 , 2233 , 2235 , the first rotating device 2221 , the second rotating device 2223 , and the transfer unit 2250 over time when there are three light sources.

[0221] In the diagrams for the first rotating device 2221 and the second rotating device 2223 in graph 2300, operation state 1 may refer to a state of rotation in a first rotational direction, operation state 0 may refer to a state of non-rotation, and operation state -1 may refer to a state of rotation in a second rotational direction opposite to the first rotational direction. In the diagrams for the first light source 2231, the second light source 2233, and the third light source 2235 in graph 2300, operation state 1 may refer to a state of irradiation of X-rays, and operation state 0 may refer to a state of non-irradiation of X-rays. In the diagrams for the transfer unit 2250 in graph 2300, operation state 1 may refer to a state of movement in the positive direction (+ direction) of the rotation axis, and operation state -1 may refer to a state of movement in the negative direction (- direction) of the rotation axis.

[0222] According to various embodiments, the CT apparatus 100 may obtain a circular CT image of an object using the operation method shown in the diagram 2300 .

[0223] According to various embodiments, the processor 110 may control the first rotating device 2221 so that it repeatedly performs a first action of rotating in a first rotational direction according to a rotation angle determined based on the number of the plurality of light sources, and a second action of rotating in a second rotational direction according to the determined rotation angle. For example, when the number of the plurality of light sources is three, the processor 110 may determine the rotation angle of the first rotating device 2221 to be 120 degrees. The processor 110 may determine the number of times the first rotating device 2221 repeatedly performs the first action and the second action based on the number of the plurality of light sources. For example, when the number of the plurality of light sources is three, the processor 110 may determine the number of times the first rotating device 2221 repeatedly performs the first action and the second action to be three.

[0224] Referring to the diagram of the transport unit 2250 in FIG2300 , the processor 110 according to various embodiments may not move the transport unit 2250 in order to obtain a circular CT image of the object.

[0225] According to various embodiments, the processor 110 can control the second rotating device 2223 to rotate in the first rotation direction at the same rotation speed as the first rotating device 2221 while the first rotating device 2221 repeatedly performs the first motion and the second motion. Referring to the graph of the second rotating device 2223 in the chart 2300, the second rotating device 2223 can be rotated in the first rotation direction from t1 to t7. For example, the processor 110 can rotate the second rotating device 2223 in the first rotation direction at the same rotation speed as the first rotating device 2221.

[0226] According to various embodiments, the processor 110 may irradiate the object with X-rays using one of the multiple light sources while the first rotating device 2221 rotates in the first rotational direction. The processor 110 may irradiate the object with X-rays using the first light source 2231 while the first rotating device 2221 rotates in the first rotational direction from t1 to t2. In this case, the second light source 2233 and the third light source 2235 may not irradiate X-rays. While the first light source 2231 is irradiating X-rays, the processor 110 may detect the X-rays that have penetrated the object using a detection device 2240 positioned opposite to the first light source 2231. The processor 110 may generate at least one low-resolution image of the object based on the X-rays detected by the detection device 2240. As described above, the processor 110 may irradiate the object with X-rays using the second light source 2233 from t3 to t4 and with the third light source 2235 from t5 to t6.

[0227] According to various embodiments, the processor 110 can rotate the first rotating device 2221 in a second rotational direction. The processor 110 can control the first rotating device 2221 so that after the first rotating device 2221 rotates in the first rotational direction by a predetermined rotational angle, it rotates in the second rotational direction by a predetermined rotational angle. Referring to the chart of the first rotating device 2221 in chart 2300 , the processor 110 can rotate the first rotating device 2221 by 120 degrees in the second rotational direction from t2 to t3. In other words, the processor 110 can return the position of the first rotating device 2221 to its original position before the rotation in the first rotational direction. As described above, the processor 110 can rotate the first rotating device 2221 by 120 degrees in the second rotational direction from t4 to t5, and also rotate the first rotating device 2221 by 120 degrees in the second rotational direction from t6 to t7.

[0228] Through the above actions, the processor can generate at least one low-resolution image of the object, and can generate a circular computed tomography image of the object based on the at least one low-resolution image.

[0229] Figure 24 : is a diagram illustrating a computer tomography method of the computer tomography apparatus 100 according to the structure of the fifth embodiment. Specifically, Figure 24 1 is a graph illustrating the operational states of the plurality of light sources 2231 , 2233 , 2235 , the first rotating device 2221 , the second rotating device 2223 , and the transfer unit 2250 over time when there are three light sources.

[0230] According to various embodiments, the CT apparatus 100 can use the operation method shown in the diagram 2400 to obtain a spiral CT image of an object, and can use the obtained spiral CT image to generate a three-dimensional image of the entire object. Figure 23 The content described in the content is repeated.

[0231] According to various embodiments, from t1 to t7, the operating states of the first rotating device 2221, the second rotating device 2223, the first light source 2231, the second light source 2233 and the third light source 2235 are the same as those of Figure 23The same. Referring to the chart of the first rotating device 2221, the second rotating device 2223, the first light source 2231, the second light source 2233, and the third light source 2235 in FIG2400, the processor 110 may control the rotating device to cause the first rotating device 2221 to repeatedly rotate in a first rotational direction and then in a second rotational direction according to a predetermined rotation angle. The processor 110 may control the second rotating device 2223 to rotate in the first rotational direction at the same rotational speed as the first rotating device 2221 while the first rotating device 2221 repeatedly performs the aforementioned operation. The processor 110 may use one of the multiple light sources to irradiate the object with X-rays while the first rotating device 2221 rotates in the first rotational direction. For example, as shown in FIG2400, the processor 110 may control the multiple light sources to irradiate the object with X-rays in the order of the first light source 2231, the second light source 2233, and the third light source 2235.

[0232] According to various embodiments, the processor 110 can control the transfer unit 2250 to move a preset distance in the positive direction of the rotation axis while the first rotating device 2221 rotates in the first direction. Referring to the graph 2400 of the transfer unit 2250, the processor 110 can move the transfer unit 2250 by the preset distance from t1 to t2, from t3 to t4, and from t5 to t6.

[0233] Through the above-described operations, the processor can generate at least one low-resolution image of the object, and based on the at least one low-resolution image, can generate a spiral computed tomography image of the object. When using the method illustrated in diagram 2400, the transport unit 2250 is moved only while one of the plurality of light sources 2231, 2233, and 2235 is irradiating the object with X-rays, thereby obtaining a spiral computed tomography image of the object.

[0234] Figure 25 : is a diagram illustrating a computer tomography method of the computer tomography apparatus 100 according to the structure of the fifth embodiment. Specifically, Figure 25 1 is a graph illustrating the operational states of the plurality of light sources 2231 , 2233 , 2235 , the first rotating device 2221 , the second rotating device 2223 , and the transfer unit 2250 over time when there are three light sources.

[0235] According to various embodiments, the CT apparatus 100 can use the operation method shown in the diagram 2500 to obtain a spiral CT image of an object, and can use the obtained spiral CT image to generate a three-dimensional image of the entire object. Figure 24The content described in the content is repeated.

[0236] According to various embodiments, from t1 to t7, the operating states of the first rotating device 2221, the second rotating device 2223, the first light source 2231, the second light source 2233 and the third light source 2235 are the same as those of Figure 24 Referring to the chart 2500 showing the first rotating device 2221, the second rotating device 2223, the first light source 2231, the second light source 2233, and the third light source 2235, the processor 110 can control the first rotating device 2221 so that the first rotating device 2221 repeatedly rotates in a first rotational direction and then in a second rotational direction according to a predetermined rotation angle. The processor 110 can irradiate an object with X-rays using one of the plurality of light sources 2231, 2233, and 2235 while the first rotating device 2221 rotates in the first rotational direction. For example, as shown in FIG. 2500 , the processor 110 can control the plurality of light sources 2231, 2233, and 2235 so that the first light source 2231, the second light source 2233, and the third light source 2235 sequentially irradiate the object with X-rays.

[0237] According to various embodiments, the processor 110 may control the second rotating device 2223 so that the second rotating device 2223 rotates in the first rotating direction at the same rotation speed as the first rotating device 2221 during the period when the first rotating device 2221 repeatedly rotates in the first rotating direction according to a determined angle and then rotates in the second direction. Referring to the graph of the second rotating device 2223 in the graph 2500, the processor 110 may control the second rotating device 2223 from t1 to t2. 13 The second rotating device 2223 is rotated in the first rotating direction.

[0238] Referring to the diagram of the transfer unit 2250 in FIG2500, the processor 110 according to various embodiments can control the transfer unit 2250 to move in a constant manner at a preset speed in the positive direction of the rotation axis from t1 to t7. During the period when the first rotating device 2221 rotates in the second rotation direction, that is, during the period when the first rotating device 2221 returns to its original position, if the transfer unit 2250 is not stopped, a portion of data may be missed in the spiral computed tomography image of the object. In order to supplement the missed data, the processor 110 can move the transfer unit 2250 again in the negative direction of the rotation axis at a preset speed. For example, the processor 110 can control the transfer unit 2250 from t7 to t7. 13 Control is performed so that the rotation axis moves in the negative direction at a constant speed set in advance.

[0239] Referring to the chart 2500 for the first rotating device 2221, the second rotating device 2223, the first light source 2231, the second light source 2233, and the third light source 2235, the processor 110 may 13 The first rotating device 2221 is controlled so as to repeatedly rotate in the first rotation direction and then in the second rotation direction according to the determined rotation angle. The processor 110 may irradiate the object with X-rays using one of the plurality of light sources 2231, 2233, and 2235 while the first rotating device 2221 rotates in the first rotation direction. For example, the processor 110 may control the rotation device 2221 to rotate in the first rotation direction from t7 to t 13 , the third light source 2235 , the second light source 2233 and the first light source 2231 control the multiple light sources in a manner of sequentially irradiating X-rays toward the object.

[0240] Through the above actions, the processor can generate at least one low-resolution image of the object, and can generate a spiral computed tomography image of the object based on the at least one low-resolution image.

[0241] Figure 26 FIG. 1 is an operation flow chart of the computed tomography apparatus 100 having the structure of the fifth embodiment.

[0242] Referring to flowchart 2600, the processor 110 of the computed tomography apparatus 100 according to various embodiments may control the first rotating device 2221 in act 2610 to cause the first rotating device 2221 to repeatedly perform a first action of rotating in a first rotational direction at a rotation angle determined based on the number of light sources, and a second action of rotating in a second rotational direction at the same determined rotation angle. For example, the processor 110 may determine the number of times the first rotating device 2221 repeatedly performs the first action and the second action based on the number of light sources.

[0243] According to various embodiments, the processor 110 may control the second rotating device 2223 in action 2620 so that the second rotating device 2223 rotates in the first rotation direction at the same rotation speed as the first rotating device 2221 while the first rotating device 2221 repeatedly performs the first action and the second action.

[0244] According to various embodiments, in action 2630, the processor 110 may irradiate the object with X-rays via one of the plurality of light sources 2231, 2233, and 2235 while the first rotating device 2221 performs the first action, and detect the X-rays that have penetrated the object via the detection device 2240. The processor 110 may generate at least one low-resolution image of the object based on the X-rays detected by the detection device 2240. The processor 110 may generate a three-dimensional image of the object using the at least one low-resolution image of the object.

[0245] <Structure of the Sixth Embodiment>

[0246] Figures 27a to 30 1 and 2 are diagrams for explaining a computed tomography apparatus 100 and a computed tomography method thereof according to a sixth embodiment. Details overlapping with those described in other embodiments are omitted.

[0247] Figure 27a is a cross-sectional view of the scanning frame of the computed tomography apparatus 100 according to the sixth embodiment, taken along an xy plane. Figure 27b FIG. 1 is a yz-plane cross-sectional view of a scanning gantry according to the sixth embodiment.

[0248] Reference Figure 27a According to various embodiments, a computed tomography apparatus 100 may include a gantry, a plurality of first light sources 2731, 2732, and 2733, a plurality of second light sources 2734, 2735, and 2736, and a detection device 2740. The gantry may include a first rotating device 2721, a second rotating device 2723, and a third rotating device 2725 in a ring shape that share a common rotation axis and can rotate independently of each other. The plurality of first light sources 2731, 2732, and 2733 may be arranged at regular intervals on the first rotating device 2721. The plurality of second light sources 2734, 2735, and 2736 may be arranged at regular intervals on the second rotating device 2723. The plurality of first light sources 2731, 2732, and 2733 and the plurality of second light sources 2734, 2735, and 2736 may irradiate an object carried on a transport portion 2750 with X-rays. In this figure, for convenience of description, it is assumed that the number of the plurality of first light sources is 3 and the number of the plurality of second light sources is 3, but the number of the plurality of first light sources and the number of the plurality of second light sources are not limited thereto.

[0249] According to various embodiments, a detection device 2740 can be positioned within a region of the third rotating device 2725. The detection device 2740 can detect X-rays that have penetrated a subject. The initial position of the third rotating device 2725 can be set so that the detection device 2740 can correspond to and face a specific light source, one of the plurality of first light sources 2731, 2732, 2733 and the plurality of second light sources 2734, 2735, 2736, that is configured to initially emit X-rays. For example, if the initial setting is such that light source 1 2731 is configured to initially emit X-rays, the processor 110 can set the position of the detection device 2740 corresponding to and facing light source 1 2731 as the initial position of the third rotating device 2725.

[0250] Reference Figure 27b The arrangement plane of the first rotating device 2721, the arrangement plane of the second rotating device 2723, and the arrangement plane of the third rotating device 2725 according to various embodiments can be arranged parallel to each other. For example, the positions of the plurality of first light sources 2731, 2732, and 2733 on the z-axis can be different from the positions of the plurality of second light sources 2734, 2735, and 2736 on the z-axis. For example, the positions of light source 1 2731, light source 2 2732, and light source 3 2733 on the z-axis can be different from the positions of light source 2 2734, light source b 2735, and light source c 2736 on the z-axis.

[0251] Figure 28 : is a diagram illustrating a computed tomography method of the computed tomography apparatus 100 according to the sixth embodiment. Specifically, Figure 28 3 is a graph showing the operation states of the first light sources 2731, 2732, 2733, the second light sources 2734, 2735, 2736, the first rotating device 2721, the second rotating device 2723, the third rotating device 2725 and the transfer unit 2750 over time when there are three first light sources and three second light sources.

[0252] In the diagrams of the first rotating device 2721, the second rotating device 2723, and the third rotating device 2725 in graph 2800, operation state 1 may refer to a state of rotation in a first rotational direction, operation state 0 may refer to a state of non-rotation, and operation state -1 may refer to a state of rotation in a second rotational direction opposite to the first rotational direction. In the diagrams of light source 1 2731, light source 2 2732, light source 3 2733, light source 2 2734, light source b 2735, and light source c 2736 in graph 2800, operation state 1 may refer to a state of emitting X-rays, and operation state 0 may refer to a state of non-emitting X-rays. In the diagrams of the transfer unit 2750 in graph 2800, operation state 1 may refer to a state of movement in the positive direction (+ direction) of the rotation axis, and operation state -1 may refer to a state of movement in the negative direction (- direction) of the rotation axis.

[0253] According to various embodiments, the CT apparatus 100 may use the operation method shown in the diagram 2800 to obtain a circular CT image of an object.

[0254] According to various embodiments, the processor 110 may control the first rotating device 2721 to repeatedly perform a first action of rotating in a first rotational direction according to a rotational angle determined based on the number of the plurality of first light sources 2731, 2732, 2733 and the plurality of second light sources 2734, 2735, 2736, and a second action of rotating in a second rotational direction according to the determined rotational angle. The processor 110 may determine the rotation angle of the first rotating device as a value obtained by dividing 360 degrees by the number of the plurality of first light sources 2731, 2732, 2733 and the plurality of second light sources 2734, 2735, 2736. For example, when the number of the plurality of first light sources 2731, 2732, 2733 is three and the number of the plurality of second light sources 2734, 2735, 2736 is three, the processor 110 may determine the rotation angle of the first rotating device 2721 to be 60 degrees.

[0255] According to various embodiments, the processor 110 may determine the number of times the first rotating device 2721 repeatedly performs the first action and the second action based on the number of the plurality of first light sources 2731, 2732, 2733 and the number of the plurality of second light sources 2734, 2735, 2736. For example, when the number of the plurality of first light sources 2731, 2732, 2733 and the number of the plurality of second light sources 2734, 2735, 2736 are three, the processor 110 may determine the number of times the first rotating device 2721 repeatedly performs the first action and the second action to be three.

[0256] According to various embodiments, the processor 110 may control the second rotating device 2723 so that the second rotating device 2723 repeatedly performs a third action of rotating in the second rotation direction according to the determined rotation angle and a fourth action of rotating in the first rotation direction. The processor 110 may control the second rotating device 2723 so that the second rotating device 2723 rotates at the same rotation speed as the first rotating device 2721.

[0257] According to various embodiments, the first movement of the first rotating device 2721 and the third movement of the second rotating device 2723 can be performed simultaneously, and the second movement of the first rotating device 2721 and the fourth movement of the second rotating device 2723 can be performed simultaneously. In other words, the first rotating device 2721 and the second rotating device 2723 can rotate in different directions. For example, the processor 110 can rotate the second rotating device 2723 in the second direction while rotating the first rotating device 2721 in the first direction, and can rotate the second rotating device 2723 in the first direction while rotating the first rotating device 2721 in the second direction.

[0258] According to various embodiments, the processor 110 can control the third rotating device 2725 to rotate in the first direction at the same rotational speed as the first and second rotating devices 2721, 2723, while the first rotating device 2721 repeatedly performs the first and second operations and the second rotating device 2723 repeatedly performs the third and fourth operations. For example, at time t1, the detection device 2740 disposed on the third rotating device 2725 can be disposed at a position corresponding to and facing the light source 1 2731. From t1 to t7, the third rotating device 2725 can rotate in the first direction at the same rotational speed as the first and second rotating devices 2721, 2723. In this case, even if X-rays are irradiated in the order of light source 1 2731, light source 2 2734, light source 2 2732, light source b 2735, light source 3 2733, and light source c 2736, the detection device 2740 can be located facing the specific light source that always irradiates X-rays. Therefore, the detection device 2740 can detect X-rays that penetrate the object from t1 to t7.

[0259] Referring to the diagram of the transport unit 2750 in FIG. 2800 , the processor 110 according to various embodiments may not move the transport unit 2750 in order to obtain a circular CT image of the object.

[0260] According to various embodiments, the processor 110 may irradiate the object with X-rays using one of the plurality of first light sources 2731, 2732, and 2733 while the first rotating device 2721 rotates in the first rotational direction (i.e., while the first rotating device 2721 performs a first motion). The processor 110 may irradiate the object with X-rays using light source 1 2731 while the first rotating device 2721 rotates in the first rotational direction from t1 to t2. In this case, light source 2 2732 and light source 3 2733 may not irradiate X-rays, and the plurality of second light sources 2734, 2735, and 2736 may also not irradiate X-rays. While light source 1 2731 irradiates X-rays, the processor 110 may detect X-rays that have penetrated the object using the detection device 2740. The processor 110 may generate at least one low-resolution image of the object based on the X-rays detected by the detection device 2740. As described above, the processor 110 may irradiate the object with X-rays using only the light source 2 2732 from t3 to t4 and irradiate the object with X-rays using only the light source 3 2733 from t5 to t6.

[0261] According to various embodiments, the processor 110 may irradiate the object with X-rays using one of the plurality of second light sources 2734, 2735, and 2736 while the second rotating device 2723 rotates in the first rotational direction (i.e., while the second rotating device 2723 performs the fifth motion). The processor 110 may irradiate the object with X-rays using light source 2 2734 while the first rotating device 2723 rotates in the first rotational direction from t2 to t3. In this case, light source b 2735 and light source c 2736 may not irradiate X-rays, and the plurality of first light sources 2731, 2732, and 2733 may also not irradiate X-rays. While light source 2 2734 irradiates X-rays, the processor 110 may detect X-rays that have penetrated the object using the detection device 2740. The processor 110 may generate at least one low-resolution image of the object based on the X-rays detected by the detection device 2740. As described above, the processor 110 may irradiate the object with X-rays using only the light source b 2735 from t4 to t5 , and may irradiate the object with X-rays using only the light source c 2736 from t6 to t7 .

[0262] Through the above-described operations, the processor can generate at least one low-resolution image of the object, and based on the at least one low-resolution image, can generate a circular computed tomography image of the object. When using the method illustrated in diagram 2800, while the first rotating device 2721 rotates in the second rotational direction (i.e., while the first rotating device 2721 returns to its original state before rotating in the first rotational direction), the second rotating device 2723 can also rotate in the first rotational direction, thereby irradiating X-rays using the plurality of second light sources 2734, 2735, and 2736.

[0263] Figure 29 : is a diagram illustrating a computed tomography method of the computed tomography apparatus 100 according to the sixth embodiment. Specifically, Figure 29 1 is a graph showing the operation states of the plurality of first light sources 2731 , 2732 , and 2733 , the plurality of second light sources 2734 , 2735 , and 2736 , the first rotating device 2721 , the second rotating device 2723 , the third rotating device 2725 , and the transfer unit 2750 over time.

[0264] According to various embodiments, the CT apparatus 100 can use the operation method shown in the diagram 2900 to obtain a spiral CT image of an object, and can use the obtained spiral CT image to generate a three-dimensional image of the entire object. Figure 29 The content described in the content is repeated.

[0265] According to various embodiments, from t1 to t7, the operating states of the first rotating device 2721, the second rotating device 2723, the third rotating device 2725, the light source 1 2731, the light source 2 2732, the light source 3 2733, the light source 2 2734, the light source b 2735 and the light source c 2736 are the same as those of the first rotating device 2721, the second rotating device 2723, the third rotating device 2725, the light source 1 2731, the light source 2 2732, the light source 3 2733, the light source 2 2734, the light source b 2735 and the light source c 2736. Figure 28 Referring to the chart 2900 showing the first rotating device 2721, the second rotating device 2723, the third rotating device 2725, the light source 1 2731, the light source 2 2732, the light source 3 2733, the light source 2 2734, the light source b 2735, and the light source c 2736, the processor 110 may control the first rotating device 2721 so that the first rotating device 2721 repeatedly rotates in the first rotational direction by a predetermined rotation angle and then rotates in the second rotational direction. The processor 110 may control the second rotating device 2723 so that while the first rotating device 2721 repeatedly performs the aforementioned operation, the second rotating device 2723 repeatedly rotates in the second rotational direction by a predetermined rotation angle at the same rotational speed as the first rotating device 2721 and then rotates in the first rotational direction.

[0266] According to various embodiments, the processor 110 can irradiate X-rays onto the subject using one of the plurality of first light sources 2731, 2732, and 2733 while the first rotating device 2721 rotates in the first direction, and can irradiate X-rays onto the subject using one of the plurality of second light sources 2734, 2735, and 2736 while the second rotating device 2723 rotates in the first direction. For example, as shown in diagram 2900, the processor 110 can control the plurality of first light sources 2731, 2732, and 2733 and the plurality of second light sources 2734, 2735, and 2736 to irradiate X-rays onto the subject in the order of light source 1 2731, light source 2 2734, light source 2 2732, light source b 2735, light source 3 2733, and light source c 2736.

[0267] According to various embodiments, the processor 110 can control the transfer unit 2750 to move at a preset speed in the positive direction of the rotation axis during the rotation of the first rotating device 2721 and the second rotating device 2723. Referring to the graph of the transfer unit 2750 in FIG2900, the processor 110 can control the transfer unit 2750 to move at the preset speed from t1 to t7.

[0268] Through the above actions, the processor can generate at least one low-resolution image of the object, and can generate a spiral computed tomography image of the object based on the at least one low-resolution image.

[0269] Figure 30 FIG. 1 is an operation flow chart of the computed tomography apparatus 100 having the structure of the sixth embodiment.

[0270] Referring to the action flow chart 300, the processor 110 of the computed tomography apparatus 100 according to various embodiments may control the first rotating device 2721 in action 3010 so that the first rotating device 2721 repeatedly performs a first action of rotating in a first rotation direction according to a degree of rotation angle determined based on the number of the plurality of first light sources 2731, 2732, 2733 and the plurality of second light sources 2734, 2735, 2736 and a second action of rotating in a second rotation direction according to the determined degree of rotation angle.

[0271] According to various embodiments, the processor 110 may control the second rotating device 2723 in action 3020 so that the second rotating device 2723 repeatedly performs a third action of rotating in the second rotation direction according to the determined rotation angle and a fourth action of rotating in the first rotation direction according to the determined rotation angle. The first action of the first rotating device 2721 and the third action of the second rotating device 2723 may be performed simultaneously, and the second action of the first rotating device 2721 and the fourth action of the second rotating device 2723 may be performed simultaneously.

[0272] According to various embodiments, the processor 110 may control the third rotating device 2725 in action 3030 so that the third rotating device 2725 rotates in the first rotating direction at the same rotation speed as the first rotating device 2721 and the second rotating device 2723 .

[0273] According to various embodiments, the processor 110 may, in action 3040, irradiate the object with X-rays through one of the plurality of first light sources 2731, 2732, 2733 during the first action performed by the first rotating device 2721, and irradiate the object with X-rays through one of the plurality of second light sources 2734, 2735, 2736 during the fourth action performed by the second rotating device 2723.

[0274] According to various embodiments, the processor 110 may detect X-rays that have penetrated the object through the detection device 2740 in Act 3050. The processor 110 may generate at least one low-resolution image of the object based on the X-rays detected by the detection device 2740. The processor 110 may generate a three-dimensional image of the object using the at least one low-resolution image of the object.

[0275] <Other embodiment structures>

[0276] Figure 31a and Figure 31b 1 is a diagram illustrating a method of adjusting the visible area of the computed tomography apparatus 100 . Figure 32 2 is a diagram illustrating a method of adjusting a visible area using a plurality of light sources. The visible area may represent an area where X-rays penetrating the object O can be detected.

[0277] Reference Figure 31aAccording to various embodiments, the computed tomography apparatus 100 generally determines a visible area based on the illumination angle of the currently operating light source 3133 among the multiple light sources 3131, 3132, 3133, and 3134. When the illumination angle of the light source includes the object O, the visible area can be determined based on the illumination angle of the light source. In this case, the detection device 3140 can be located in the visible area and detect X-rays that have penetrated the object O. For example, when the computed tomography apparatus 100 is to obtain a computed tomography image of the object O in a narrow area, the visible area can be narrowed.

[0278] Reference Figure 31b When obtaining a computed tomography image of a wide area of the object O, the visible area can be set to be wider than the irradiation angle of the light source. In this case, the detection device 3140 can be moved from the first position 3140a to the second position 3140b to detect X-rays that have penetrated the object O. In this case, repeated X-ray irradiation is not required to obtain a computed tomography image of the object O, thereby reducing the amount of X-rays exposed to the object O.

[0279] Reference Figure 32 According to various embodiments, the computed tomography apparatus 100 can drive all of the multiple light sources 3131, 3132, 3133, and 3134 and adjust the visible area even when some of the light sources are not located facing each other with respect to the detection device 3140. In such cases, a computed tomography image of the object O can be obtained without moving the detection device 3140.

[0280] Figure 33 FIG. 1 is a diagram illustrating a computed tomography apparatus 100 according to various embodiments of the present disclosure.

[0281] According to various embodiments, the power supply device 160 of the computed tomography apparatus 100 can be disposed outside the gantry 120. When the power supply device 160 is disposed outside the gantry 120, even if the gantry 120 rotates, the power supply device 160 does not rotate with it, thereby improving stability. The power supply device 160 can be connected to the plurality of light sources 130 using a cable. The cable can be made of a non-bending material. The plurality of light sources 130 can receive power from the power supply device 160 via the metal portion 135. To improve stability, an insulating material can be molded around the metal portion 135. The insulating material can be, for example, insulating oil or silicone.

[0282] Figures 34a to 35b FIG. 1 is a diagram illustrating a structure of a computed tomography apparatus 100 according to various embodiments of the present disclosure.

[0283] Figure 34a is an xy-plane cross-sectional view of the scanning frame 3420 of the computed tomography apparatus 100 according to various embodiments. Figure 34b 1 and 2 are diagrams schematically illustrating a yz cross-sectional view of the gantry 3420 .

[0284] According to various embodiments, a computed tomography apparatus 100 may include a gantry 3420 comprising a first rotating device 3421 and a second rotating device. Multiple light sources 3430 may be arranged at regular intervals within the first rotating device 3421. A detection device 3440 may be disposed within the second rotating device, and the detection device 3440 may be configured to surround the second rotating device. While this figure illustrates eight light sources 3430, the number of light sources is not limited thereto. When there are eight light sources, the light sources may be arranged at 45-degree intervals within the first rotating device.

[0285] According to various embodiments, the positions of the plurality of light sources 3430 on the z-axis may be different from each other. For example, the plurality of light sources 3430 may be arranged as follows: Figure 34b As shown in the figure. Figure 35a and 35b As shown in the figure, the structure of the first rotating device 3421 can be changed by applying force in the z-axis direction to the first rotating device 3421 equipped with multiple light sources 3430. Figure 35a and 35b When the first rotating device 3421 of the illustrated structure is used, the CT apparatus 100 can obtain a spiral CT image of the object.

[0286] In the action flow chart, process steps, method steps, algorithms, etc. are described in sequence, but these processes, methods, and algorithms can be configured to act in any suitable order. In other words, the steps of the processes, methods, and algorithms described in the various embodiments of the present disclosure do not need to be executed in the order described in the present disclosure. In addition, although the description describes a situation where some steps are executed asynchronously, in other embodiments, these steps can be executed simultaneously. In addition, the examples of processes described in the accompanying drawings are not intended to exclude different variations or revisions of the exemplified processes, nor are they intended to indicate that the exemplified processes or any one of their steps are necessary for more than one of the various embodiments of the present disclosure, nor are they intended to indicate that the exemplified processes are preferred.

[0287] Although the method is described through a specific embodiment, the method can also be embodied in a computer-readable recording medium as a computer-readable code. Computer-readable recording media include all types of recording devices that store data that can be read by a computer system. Computer-readable recording media may include, for example, ROM (read-only memory), RAM (random access memory), CD-ROM (read-only optical disk drive), magnetic tape, floppy disk, optical data storage device, etc. In addition, the computer-readable recording medium can be distributed among computer systems connected by a network, thereby storing and running the computer-readable code in a distributed manner. Moreover, the functional programs, codes, and code fragments required to embody the embodiments can be easily derived by programmers in the technical field to which the present disclosure belongs.

[0288] While the technical concepts of the present disclosure have been illustrated through some of the embodiments and accompanying drawings, it should be understood that various substitutions, modifications, and variations are possible without departing from the technical concepts and scope of the present disclosure as would be understood by a person of ordinary skill in the art. Furthermore, such substitutions, modifications, and variations should be considered as encompassed by the accompanying claims.

Claims

1. A computerized tomography apparatus, comprising: A scanning frame, the scanning frame including a first rotating device, a second rotating device, and a third rotating device in a ring shape that share a rotation axis and can rotate independently of each other; a plurality of first light sources, the plurality of first light sources being arranged at regular intervals on the first rotating device and configured to irradiate an object with X-rays; a plurality of second light sources, the plurality of second light sources being arranged at regular intervals on the second rotating device and configured to irradiate X-rays toward the object; a detection device, the detection device being disposed in a region of the third rotating device and configured to detect X-rays penetrating the object; and More than one processor; The one or more processors are configured as follows: controlling the first rotating device to repeatedly perform a first action and a second action, wherein the first action causes the first rotating device to rotate in a first rotation direction according to a rotation angle determined based on the number of the plurality of first light sources and the plurality of second light sources, and the second action causes the first rotating device to rotate in a second rotation direction opposite to the first rotation direction by the determined rotation angle. controlling the second rotating device to repeatedly perform a third action and a fourth action, wherein the third action causes the second rotating device to rotate in the second rotation direction by the determined rotation angle, and the fourth action causes the second rotating device to rotate in the first rotation direction by the determined rotation angle; During a period in which the first rotating device repeats the first and second actions and the second rotating device repeats the third and fourth actions, the third rotating device is controlled so as to rotate in the first rotation direction at the same rotation speed as the first and second rotating devices. During the first rotation device performs the first action, one of the plurality of first light sources is used to irradiate the object with X-rays, and during the second rotation device performs the fourth action, one of the plurality of second light sources is used to irradiate the object with X-rays. The X-rays penetrating the object are detected by the detection device.

2. The computer tomography apparatus according to claim 1, wherein: The first action and the third action are performed simultaneously. The second action and the fourth action are performed simultaneously.

3. The computer tomography apparatus according to claim 1, wherein: the one or more processors, Changing one of the plurality of first light sources and the plurality of second light sources to irradiate X-rays based on a preset order, The number of times the first rotating device repeats the first and second actions and the number of times the second rotating device repeats the third and fourth actions are determined based on the number of the plurality of first light sources and the plurality of second light sources.

4. The computer tomography apparatus according to claim 3, wherein: the one or more processors, When it is initially set to irradiate X-rays from a specific light source among the multiple first light sources and the multiple second light sources based on the preset order, the initial position of the third rotating device is controlled so that the detection device is located at a position corresponding to and facing the specific light source.

5. The computer tomography apparatus according to claim 1, wherein: The one or more processors are configured as follows: generating at least one low-resolution image of the object in response to detecting X-rays penetrating the object by the detection device, A three-dimensional image of the object volume is generated based on the at least one low-resolution image of the object volume.

6. The computer tomography apparatus according to claim 1, wherein: It also includes a transfer unit that carries the object. The one or more processors are configured as follows: The conveying portion is moved toward the rotation axis at a preset speed.

7. The computer tomography apparatus according to claim 1, wherein: The determined rotation angle is a value obtained by dividing 360 degrees by the number of the first light sources and the number of the second light sources.

8. The computer tomography apparatus according to claim 1, wherein: The plurality of first light sources and the plurality of second light sources are X-ray light sources using carbon nanotubes.

9. The computer tomography apparatus according to claim 1, wherein: The arrangement plane of the first rotating device, the arrangement plane of the second rotating device, and the arrangement plane of the third rotating device, which are perpendicular to the rotation axis, are parallel to each other.

10. The computer tomography apparatus according to claim 1, wherein: A power supply device is further included, the power supply device being configured to supply power required to output X-rays to the plurality of first light sources and the plurality of second light sources. The power supply device is configured outside the scanning frame.

11. A computerized tomography method using a computerized tomography apparatus, the computerized tomography apparatus comprising: A scanning frame, the scanning frame including a first rotating device, a second rotating device, and a third rotating device in a ring shape that share a rotation axis and can rotate independently of each other; a plurality of first light sources, the plurality of first light sources being arranged at regular intervals on the first rotating device and configured to irradiate X-rays toward the object; a plurality of second light sources, the plurality of second light sources being arranged at regular intervals on the second rotating device and configured to irradiate X-rays toward the object; and a detection device, the detection device being arranged in an area of the third rotating device and configured to detect X-rays that penetrate the object; wherein, The computer tomography method comprises: controlling the first rotating device to repeat a first action and a second action, wherein the first action causes the first rotating device to rotate in a first rotation direction at a rotation angle determined based on the number of the plurality of first light sources and the plurality of second light sources, and the second action causes the first rotating device to rotate in a second rotation direction opposite to the first rotation direction by the determined rotation angle; controlling the second rotating device to repeatedly perform a third action and a fourth action, wherein the third action causes the second rotating device to rotate in the second rotation direction by the determined rotation angle, and the fourth action causes the second rotating device to rotate in the first rotation direction by the determined rotation angle; controlling the movement of the third rotating device so that the third rotating device rotates in the first rotation direction at the same rotation speed as the first rotating device and the second rotating device; An action of irradiating the object with X-rays through one of the plurality of first light sources while the first rotating device performs the first action, and irradiating the object with X-rays through one of the plurality of second light sources while the second rotating device performs the fourth action; and The detection device detects the movement of X-rays penetrating the object.

12. The computer tomography method according to claim 11, wherein: The first action and the third action are performed simultaneously. The second action and the fourth action are performed simultaneously.

13. The computer tomography method according to claim 11, wherein: Also includes: The operation of one of the plurality of first light sources and the plurality of second light sources to irradiate X-rays is changed based on a preset order, The number of times the first rotating device repeats the first and second actions and the number of times the second rotating device repeats the third and fourth actions are determined based on the number of the plurality of first light sources and the plurality of second light sources.

14. The computer tomography method according to claim 13, wherein: Also includes: When it is initially set to irradiate X-rays from a specific light source among the multiple first light sources and the multiple second light sources based on the preset order, the initial position of the third rotating device is controlled to make the detection device located at a position corresponding to and facing the specific light source.

15. The computer tomography method according to claim 11, wherein: Also includes: generating at least one low-resolution image of the object in response to detecting X-rays penetrating the object by the detection device, The act of generating a three-dimensional image of the object volume based on at least one low-resolution image of the object volume.

16. The computer tomography method according to claim 11, wherein: Also includes: The action of moving the transport portion carrying the object in the direction of the rotation axis at a preset speed.

17. The computer tomography method according to claim 11, wherein: The determined rotation angle is a value obtained by dividing 360 degrees by the number of the first light sources and the number of the second light sources.

18. The computer tomography method according to claim 11, wherein: The plurality of first light sources and the plurality of second light sources are X-ray light sources using carbon nanotubes.

19. The computer tomography method according to claim 11, wherein: The arrangement plane of the first rotating device, the arrangement plane of the second rotating device, and the arrangement plane of the third rotating device, which are perpendicular to the rotation axis, are parallel to each other.

20. The computer tomography method according to claim 11, wherein: The power supply device is configured to supply power required for outputting X-rays to the plurality of first light sources and the plurality of second light sources, and is disposed outside the gantry.

Images