X-ray imaging device

Abstract

To provide an X-ray imaging device that enables selection of a desired irradiation angle from among a plurality of irradiation angles of past X-ray imaging in a shorter time than that of a conventional technology.SOLUTION: An X-ray imaging device includes: an irradiation part that irradiates a subject with an X-ray; a detection part that detects the X-ray transmitted through the subject; a support part that supports the irradiation part and the detection part so as to face each other and is rotatable around two axes orthogonal to each other; a setting part that sets an angle by which the subject is irradiated with the X-ray; a control part that controls the support part such that the angle by which the subject is irradiated with the X-ray becomes a set angle and controls the irradiation part such that the X-ray imaging of the subject is performed; a storage part that stores set angles in X-ray imaging when the X-ray imaging is performed a plurality of times; and a display part that sorts and displays the plurality of angles stored in the storage part. When the angled displayed in the display part is designated, the setting part sets the designated angle as the angle.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The technology of the present disclosure relates to an X-ray imaging apparatus. [Background technology]

[0002] The X-ray imaging device disclosed in Patent Document 1 stores an X-ray image obtained by X-ray imaging in a storage device together with the X-ray irradiation angle used during X-ray imaging. At the next imaging time, the X-ray imaging device reads the X-ray image and irradiation angle from the storage device and displays the read X-ray image and irradiation angle on a monitor on an operation console. When a displayed irradiation angle is selected, the X-ray imaging device controls a support device so that X-rays are irradiated at the selected irradiation angle, and then performs X-ray imaging.

[0003] Furthermore, Patent Document 2 discloses that a display that allows the user to select the irradiation angle of X-rays is installed on the side of the patient's bed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-292984 [Patent Document 2] International Publication No. 2024 / 042823 Summary of the Invention [Problem to be solved by the invention]

[0005] As described in Patent Document 1, when an operator desires to perform the next imaging at the same X-ray irradiation angle as in the previous imaging, a pair of the X-ray image and the irradiation angle is displayed on the monitor of the console.

[0006] However, when a plurality of pairs of X-ray images and irradiation angles are displayed, it takes a long time to select a desired irradiation angle from them.

[0007] For example, since a plurality of illumination angles are displayed, it takes a long time to determine which of the illumination angles is the desired illumination angle, and as a result, it takes a long time to select the desired angle.

[0008] Furthermore, as described in Patent Document 2, X-ray imaging devices that have a display that allows selection operations on the side of the patient's bed are becoming more common. However, the display area of ​​such displays is not large. When displaying multiple sets as in Patent Document 1, only a small number of sets are displayed at a time, and in order to find the desired irradiation angle, it is necessary to switch the display until the set corresponding to the desired irradiation angle is displayed. As a result, it takes a long time to select the desired irradiation angle.

[0009] The technology disclosed herein has been developed in consideration of the above facts, and aims to provide an X-ray imaging device that can select a desired irradiation angle from multiple irradiation angles at which X-ray imaging has been performed in the past in a shorter time than conventional technology. [Means for solving the problem]

[0010] In order to achieve the above object, an X-ray imaging apparatus according to a first aspect of the disclosed technique comprises an irradiation unit that irradiates an object with X-rays, a detection unit that is disposed opposite the irradiation unit and that detects X-rays that have passed through the object, a support unit that supports the irradiation unit and the detection unit so that they face each other and is rotatable about each of two orthogonal axes, a setting unit that sets the angle at which the X-rays are irradiated to the object, a control unit that controls the support unit so that the angle at which the X-rays are irradiated to the object becomes the set angle and that controls the irradiation unit so that X-ray imaging of the object is performed, a memory unit that stores the set angle for each X-ray imaging when multiple X-ray imaging sessions are performed, and a display unit that sorts and displays the multiple angles stored in the memory unit, and when an angle displayed on the display unit is specified, the setting unit sets the specified angle as the angle.

[0011] An X-ray imaging device of a second aspect includes a bed on which a subject is placed, an irradiation unit that irradiates the subject with X-rays, a detection unit that is arranged opposite the irradiation unit and detects X-rays that have passed through the subject, a support unit that supports the irradiation unit and the detection unit so that they face each other and is rotatable about each of two orthogonal axes, a setting unit that sets the angle at which the X-rays are irradiated to the subject, a control unit that controls the support unit so that the angle at which the X-rays are irradiated to the subject becomes the set angle and controls the irradiation unit so that X-ray imaging of the subject is performed, a memory unit that stores the set angle for each X-ray imaging when multiple X-ray imaging sessions are performed, and a display unit that is provided on the side of the bed and displays the multiple angles stored in the memory unit without displaying X-ray images obtained by the X-ray imaging sessions, and when an angle displayed on the display unit is specified, the setting unit sets the specified angle as the angle. [Effects of the Invention]

[0012] The technology of the present disclosure can select a desired irradiation angle from among multiple irradiation angles at which X-ray imaging has been performed in the past in a shorter time than conventional technology. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a block diagram showing an example of an X-ray imaging system according to an embodiment. [Figure 2] FIG. 2 is a front view illustrating an example of the overall configuration of the X-ray imaging apparatus according to the embodiment. [Figure 3] FIG. 3 is a right side view illustrating an example of the overall configuration of the X-ray imaging apparatus. [Figure 4A] FIG. 4A is a block diagram showing an example of a control system of an X-ray imaging apparatus. [Figure 4B] FIG. 4B is a functional block diagram showing an example of the processing contents of the determination unit, communication processing unit, readout unit, sorting processing unit, and display processing unit of the processor of the X-ray imaging apparatus. [Figure 4C]FIG. 4C is a functional block diagram showing an example of the processing contents of the determination unit, angle control unit, imaging processing unit, storage processing unit, and communication processing unit of the processor of the X-ray imaging apparatus. [Figure 5] FIG. 5 is a schematic diagram illustrating an example of the rotation direction of the C-arm. [Figure 6] FIG. 6 is a schematic diagram illustrating an example of the rotation directions of the CRA and CAU of the C-arm. [Figure 7] FIG. 7 is a schematic diagram illustrating an example of the rotation directions of the RAO and LAO of the C-arm. [Figure 8] FIG. 8 is a conceptual diagram showing an example of the contents stored in the angle storage unit of the X-ray imaging apparatus. [Figure 9] FIG. 9 is a conceptual diagram showing an example of the contents stored in the storage device of the server. [Figure 10] FIG. 10 is a perspective view showing an example of the outline of the operation console. [Figure 11] FIG. 11 is a diagram showing an example of a display screen of the touch panel. [Figure 12] FIG. 12 is a diagram showing the relationship between the display content of the monitor and the size of the display area of ​​the monitor and the touch panel. [Figure 13] FIG. 13 is a flowchart of an example of the X-ray imaging processing program. [Figure 14] FIG. 14 is a diagram showing an example of the display content of the irradiation angle display section of the touch panel that displays a plurality of set angles in chronological order of the dates and times of X-ray imaging. [Figure 15] FIG. 15 is a conceptual diagram showing an example of the contents stored in the angle storage unit of the X-ray imaging apparatus according to the modified example. [Figure 16] FIG. 16 is a conceptual diagram showing an example of the contents stored in the storage device of the server according to the modified example. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the technology of the present disclosure will be described with reference to the drawings.

[0015] (composition) Fig. 1 is a block diagram showing an example of an X-ray imaging system according to an embodiment. As shown in Fig. 1, the X-ray imaging system includes an X-ray imaging device 1 that performs X-ray imaging of an imaging target (i.e., a lesion (i.e., an affected area)) of a subject M, and a server device (hereinafter referred to as "server") 100. The server 100 includes a storage device 102M. The storage device 102M is an example of a "storage section" and a "second storage section" in the technology of the present disclosure. The X-ray imaging device 1 is an example of an "X-ray imaging device" in the technology of the present disclosure.

[0016] X-ray photography is the process of irradiating a subject with X-rays at a set angle to create contrast images. This contrast imaging allows for the identification, evaluation, and treatment of the subject. "X-ray photography" is a concept that includes fluoroscopy. Furthermore, the imaging target (i.e., the lesion site) may be, for example, a blood vessel in the heart, and angina or myocardial infarction may occur in the blood vessel. Note that the imaging target is not limited to the blood vessel in the heart, but may also be a blood vessel in the groin, arm, wrist, or the like. Furthermore, the imaging target is not limited to a blood vessel, but may also be another body part. The set angle is the X-ray irradiation angle set for X-ray imaging.

[0017] Fig. 2 is a front view illustrating an example of the overall configuration of the X-ray imaging device 1 according to the embodiment, and Fig. 3 is a right side view illustrating an example of the overall configuration of the X-ray imaging device 1.

[0018] 2 and 3, the X-ray imaging apparatus 1 includes a bed 3. A subject M is placed on the bed 3 in a supine position along the longitudinal direction of the bed 3. The bed 3 is an example of the "bed" of the technology of the present disclosure.

[0019] The longitudinal direction of the bed 3 is the x-direction, the lateral direction of the bed 3 is the y-direction, and the direction perpendicular to the x-direction and y-direction is the z-direction (also called the height direction, vertical direction, or up-down direction). The xy plane is the horizontal plane. The axis parallel to the x-direction is the first horizontal axis A1 (see Figures 2 and 7). The axis parallel to the y-direction is the second horizontal axis A2 (see Figures 2 and 6). The first horizontal axis A1 and the second horizontal axis A2 are perpendicular to each other.

[0020] In the X-ray imaging apparatus 1, an X-ray tube 5 and an X-ray detector 7 are arranged facing each other with a bed 3 in between. The X-ray tube 5 irradiates X-rays onto the subject M. The X-ray detector 7 detects the X-rays irradiated from the X-ray tube 5 and transmitted through the subject M, converts them into an electrical signal, and outputs it as an X-ray detection signal. An example of the X-ray detector 7 is an FPD (Flat Panel Detector). A collimator 17 is provided below the X-ray tube 5. The collimator 17 limits the X-rays irradiated from the X-ray tube 5 to a predetermined shape. An example of a shape that limits the X-rays is a pyramidal cone. The X-ray tube 5 and the X-ray detector 7 are examples of the "irradiation unit" and the "detection unit" of the technology of the present disclosure, respectively.

[0021] The X-ray tube 5 and the X-ray detector 7 are each mounted on a C-arm 9. The C-arm 9 has a curved, approximately C-shaped configuration. The X-ray tube 5 is mounted on one end 19T1 of the C-arm 9. The X-ray detector 7 is mounted on the other end 19T2 of the C-arm 9. The C-arm 9 is held by an arm holding member 11. The C-arm 9 and the arm holding member 11 are configured so that the C-arm 9 slides along the arc path of the C-arm 9 indicated by the symbol RA in FIG. 2. By sliding in the direction indicated by the symbol RA, the C-arm 9 rotates about a second horizontal axis A2, as shown in FIGS. 2 and 6.

[0022] The arm holding member 11 is disposed on a side surface 13S of the support column 13. The arm holding member 11 and the support column 13 are configured so that the arm holding member 11 is rotatable about a first horizontal axis A1. The rotation of the arm holding member 11 causes the C-arm 9 to rotate about the first horizontal axis A1.

[0023] As described above, in this embodiment, the C-arm 9 rotates independently about two orthogonal axes (i.e., the first horizontal axis A1 and the second horizontal axis A2), allowing the X-ray tube 5 to irradiate the subject M with X-rays in any direction.

[0024] 2 and 3, the state in which the X-ray tube 5 and X-ray detector 7 are positioned vertically relative to the subject M is defined as the initial state of the C-arm 9. The rotation position of the C-arm 9 in this initial state is defined as the initial position of the C-arm 9. With respect to the initial position of the C-arm 9, the rotation angle of the C-arm 9 is set to 0° for rotation about each of the first horizontal axis A1 and the second horizontal axis A2.

[0025] The support column 13 is supported by a support base 15 disposed on the floor. The support column 13 and the support base 15 are configured so that the support column 13 can move horizontally in the y direction. The arm holding member 11 and the C-arm 9 move in the y direction in accordance with the horizontal movement of the support column 13.

[0026] Next, the rotation mechanism of C-arm 9 will be described. Rotation of C-arm 9 about second horizontal axis A2 is achieved by a drive mechanism inside arm holding member 11. A part of belt 19 is stored inside arm holding member 11. One end 19A of belt 19 is fixed to the X-ray detector 7 side of C-arm 9, and the other end 19B of belt 19 is fixed to the X-ray tube 5 side of C-arm 9. Belt 19 is stretched over drive roller 23 via guide roller 21.

[0027] A drive motor M1 and rotary encoder R1 are provided inside the arm holding member 11. For ease of explanation, in FIG. 2, the drive motor M1 and rotary encoder R1 are shown as being located outside the arm holding member 11. The drive motor M1 rotates the drive roller 23. The rotary encoder R1 detects the direction and amount of rotation of the drive motor M1. The rotation of the drive motor M1 rotates the C-arm 9 around the second horizontal axis A2 via the belt 19.

[0028] Rotation of the C-arm 9 around the first horizontal axis A1 is achieved by rotating the arm holding member 11 around the first horizontal axis A1. A base 11T of the arm holding member 11, i.e., the end opposite to the side holding the C-arm 9, is rotatably supported on a side surface 13S of the support 13. A gear 25 is fixed to the arm holding member 11 near the base 11T.

[0029] Gear 25 meshes with pinion gear 27. Pinion gear 27 is attached to the output shaft of drive motor M2, which is provided inside support column 13. As drive motor M2 rotates, C-arm 9 rotates together with arm holding member 11 about first horizontal axis A1. The direction and amount of rotation of drive motor M2 are detected by rotary encoder R2. The C-arm 9, arm holding member 11, drive motor M1, drive roller 23, gear 25, pinion gear 27, and drive motor M2 are an example of the "support portion" of the technology of the present disclosure.

[0030] The X-ray imaging device 1 includes a monitor 207 that is rotatably attached to a ceiling 205 of an examination room in which the X-ray imaging device 1 is placed via a rotation shaft 206. An example of the monitor 207 is a liquid crystal monitor. The monitor 207 does not necessarily have to be attached to the ceiling 205 of the examination room, but may also be attached to a mobile cart. The monitor 207 is an example of the "other display unit" of the technology of the present disclosure.

[0031] The X-ray imaging device 1 includes an operation console 39 .

[0032] Next, a control system of the X-ray imaging apparatus 1 will be described. Fig. 4A is a block diagram showing an example of the control system of the X-ray imaging apparatus 1. As shown in Fig. 4A, the control system of the X-ray imaging apparatus 1 includes a computer 70. The computer 70 includes a processor 72, a RAM 74, a storage device 37, and an input / output (I / O) port 77. The processor 72, the RAM 74, the storage device 37, and the input / output (I / O) port 77 are connected to each other via a bus 79 so as to be able to communicate with each other. The processor 72 is an example of the "control unit" of the technology of the present disclosure.

[0033] The processor 72 is a processing device including a DSP (Digital Signal Processor), a CPU (Central Processing Unit), and a GPU (Graphics Processing Unit), and the DSP and GPU operate under the control of the CPU and are responsible for executing X-ray imaging processing. Here, a processing device including a DSP, a CPU, and a GPU is given as an example of the processor 72, but this is merely an example, and the processor 72 may be one or more CPUs and DSPs with integrated GPU functionality, one or more CPUs and DSPs without integrated GPU functionality, or may be equipped with a TPU (Tensor Processing Unit).

[0034] The RAM 74 is a memory that temporarily stores information and is used as a work memory by the processor 72. The RAM 74 may be, for example, a dynamic random access memory (DRAM) or a static random access memory (SRAM).

[0035] The storage device 37 is a non-volatile storage device and stores an X-ray imaging processing program 37P and an angle storage unit 61. The angle storage unit 61 is an example of the "storage unit" and the "first storage unit" of the technology of the present disclosure.

[0036] The processor 72 includes a determination unit 72A, a readout unit 72B, a communication processing unit 72C, a sorting processing unit 72D, a display processing unit 72E, an angle control unit 72F, an imaging processing unit 72G, and a storage processing unit 72H.

[0037] The input / output (I / O) port 77 is connected to the drive motors M1 and M2, rotary encoders R1 and R2, the X-ray tube 5, the X-ray detector 7, the image generation device 30, and the monitor 207. The image generation device 30 is connected to the X-ray detector 7 and the monitor 207.

[0038] The processor 72 controls the direction and amount of rotation of the drive motors M1 and M2.

[0039] Processor 72 detects the rotation position of C-arm 9 based on the direction and amount of rotation of drive motor M1 detected by rotary encoder R1 and the direction and amount of rotation of drive motor M2 detected by rotary encoder R2. The rotation position of C-arm 9 is determined by the direction and angle of rotation of C-arm 9.

[0040] The processor 72 controls the amount of X-rays emitted by the X-ray tube 5 and the timing of X-ray emission.

[0041] The image generating device 30 is provided after the X-ray detector 7, and generates an X-ray image based on the X-ray detection signal output from the X-ray detector 7. The monitor 207 is provided after the image generating device 30, and displays the X-ray image generated by the image generating device 30.

[0042] The input / output (I / O) port 77 is connected to the touch panel 43 of the console 39, the rotation instruction switch 45, and the end instruction switch 47 (see also FIG. 10).

[0043] The input / output (I / O) port 77 is connected to a foot switch 204 and a communication unit 55. The communication unit 55 is connected to a communication unit (not shown) of the server 100 via a communication line.

[0044] The processor 72 reads the X-ray imaging processing program 37P from the storage device 37 and executes the read X-ray imaging processing program 37P on the RAM 74, thereby functioning as a judgment unit 72A, a reading unit 72B, a communication processing unit 72C, a sorting processing unit 72D, a display processing unit 72E, an angle control unit 72F, an imaging processing unit 72G, and a memory processing unit 72H.

[0045] Next, a description will be given of the processing contents of each functional unit of the processor 72 of the X-ray imaging apparatus 1. Fig. 4B is a functional block diagram showing an example of the processing contents of the determination unit 72A, communication processing unit 72C, reading unit 72B, sorting processing unit 72D, and display processing unit 72E of the processor 72 of the X-ray imaging apparatus. Fig. 4C is a functional block diagram showing an example of the processing contents of the determination unit 72A, angle control unit 72F, imaging processing unit 72G, storage processing unit 72H, and communication processing unit 72C of the processor 72 of the X-ray imaging apparatus.

[0046] As shown in FIG. 4B, the determination unit 72A determines whether a set angle is stored in the angle storage unit 61 of the device itself (X-ray imaging device 1). The readout unit 72B reads out the set angle from the angle storage unit 61. The communication processing unit 72C receives the set angle from the server 100 via the communication unit 55. The sorting processing unit 72D sorts the set angle read out from the angle storage unit 61 and the set angle received from the server 100. The display processing unit 72E displays the set angles on the touch panel 43 in the sorted order.

[0047] As shown in FIG. 4C , the determination unit 72A determines whether an irradiation angle has been set based on an operation on the touch panel 43. If the determination unit 72A determines that an irradiation angle has been set, the angle control unit 72F controls the direction and amount of rotation of the drive motors M1 and M2 so that the irradiation angle becomes the set angle. The determination unit 72A determines whether an imaging instruction has been issued by determining whether the foot switch 204 has been operated. If it determines that an imaging instruction has been issued, the imaging processing unit 72G controls the X-ray tube 5 to irradiate X-rays. The X-rays irradiated from the X-ray tube 5 are irradiated onto the subject M, and the X-ray detector 7 outputs an X-ray detection signal to the image generation device 30. The image generation device 30 generates an X-ray image in accordance with an instruction from the imaging processing unit 72G. The monitor 207 displays the X-ray image generated by the image generation device 30 in accordance with an instruction from the imaging processing unit 72G. The storage processing unit 72H stores the set angle in the angle storage unit 61 of the imaging device itself. The communication processing unit 72C controls the communication unit 55 so as to transmit the set angle to the server 100. The server 100 that receives the set angle stores the set angle.

[0048] Next, the rotation direction of the C-arm 9 will be described. As shown in FIGS. 5 and 6, among the rotation directions of the C-arm 9, the direction toward the head side around the second horizontal axis A2 will be referred to as "CRA" (Cranial), and the direction toward the feet side will be referred to as "CAU" (Caudal). As shown in FIGS. 5 and 7, among the rotation directions of the C-arm 9, the rotation direction toward the left side as viewed from the head side to the feet side around the first horizontal axis A1 will be referred to as "LAO" (Left Anterior Oblique), and the rotation direction toward the right side will be referred to as "RAO" (Right Anterior Oblique). As described above, the rotation direction of the C-arm 9 is represented by a combination of CRA or CAU and LAO or RAO. The irradiation angle of X-rays from the X-ray tube 5 is determined by the CRA or CAU and the LAO or RAO.

[0049] Next, the contents stored in the angle storage unit 61 in the storage device 37 will be described. FIG. 8 is a conceptual diagram showing an example of the contents stored in the angle storage unit 61. As shown in FIG. 8, the angle storage unit 61 includes an area 61D for storing information on the date and time when X-ray imaging was performed, and areas 61A1 to 61A4 for storing information on the angles CRA, CAU, LAO, and RAO. FIG. 8 also shows how information on the date and time when X-ray imaging was performed on patient A and information on the angle of X-ray irradiation by the X-ray tube 5 during the X-ray imaging are stored. As described above, the X-ray irradiation angle is defined by CRA or CAU and LAO or RAO. The angle storage unit 61 stores information on the date and time when X-ray imaging was performed and the irradiation angle during one examination of the subject M (e.g., patient A). Therefore, when the examination is completed (i.e., when the execution of the X-ray imaging processing program is completed), the data stored in the angle storage unit 61 is erased. In one examination, a plurality of sets of the date and time of X-ray imaging and the irradiation angle are stored in the angle storage unit 61. The number of sets is not fixed to, for example, three sets.

[0050] Here, an examination refers to taking an X-ray of the imaging target (i.e., the lesion site) of the subject M and examining the condition of the imaging target from the X-ray image. Usually, the imaging target is X-rayed multiple times in one examination. After one examination is completed, the next examination is performed after a certain period of time (e.g., several months) has passed.

[0051] Next, the contents stored in the storage device 102M of the server 100 will be described. FIG. 9 is a conceptual diagram showing an example of the contents stored in the storage device 102M of the server 100. As shown in FIG. 9, the storage device 102M includes an area 102D for storing information on the date and time when X-ray imaging was performed for each subject M (i.e., corresponding to the identification information of the subject M), and areas 102A1 to 102A4 for storing information on the angles of CRA, CAU, LAO, and RAO. FIG. 9 shows how information on the date and time when X-ray imaging was performed for patient A and information on the irradiation angle of X-rays from the X-ray tube 5 during the X-ray imaging (i.e., CRA or CAU, and LAO or RAO) are stored. The storage device 102M stores history information on the date and time when X-ray imaging was performed and the irradiation angle in multiple previous examinations of the subject M (e.g., patient A).

[0052] Next, we will explain the operation console 39. The operation console 39 is used to input instructions from the operator regarding the operation of the X-ray imaging apparatus 1. In accordance with the instructions input by the operator using the operation console 39, the processor 72 controls each part of the control system of the X-ray imaging apparatus 1. Examples of the operation console 39 include a keyboard input panel, a touch input panel, a mouse, a dial, a changeover switch, and a push button switch.

[0053] In this embodiment, the console 39 is placed on the side of the bed 3 as shown in Fig. 2. The operator operates the console 39 while standing near the bed 3. By placing the console 39 on the bed 3, the operator can perform various operations on the X-ray imaging device 1 while performing a procedure such as a catheter procedure or an examination on the subject M.

[0054] The operation console 39 is not limited to being placed on the side of the bed 3, but may be placed on the top surface of a movable cart. The operation console 39 is not limited to being placed on the side of the long side of the bed 3, but may be placed on the side of the short side of the bed 3.

[0055] Next, we will explain the main operation devices provided on the operation console 39. Fig. 10 is a perspective view showing an example of the outline of the operation console 39. As shown in Fig. 10, the operation console 39 is equipped with an arm operation lever 41, a touch panel 43, a rotation instruction switch 45, and an end instruction switch 47.

[0056] The arm operating lever 41 is configured to be tiltable forward, backward, left, and right, and is a lever for adjusting the rotation position of the C-arm 9. As an example, the operator grips the arm operating lever 41 and tilts it forward (i.e., toward the back), thereby instructing the C-arm 9 to rotate in the LAO direction (see FIG. 7). The operator grips the arm operating lever 41 and tilts it toward the operator, thereby instructing the C-arm 9 to rotate in the RAO direction (see FIG. 7). The rotation angle of the C-arm 9 changes depending on the angle at which the arm operating lever 41 is tilted or the time for which it is tilted. Note that FIG. 7 shows the C-arm 9 rotated in the LAO direction by an angle θLAO=30°.

[0057] Furthermore, the operator grips arm operating lever 41 and tilts it to the left, which commands the C-arm 9 to rotate in the CRA direction (see Figure 6). The operator grips arm operating lever 41 and tilts it to the right, which commands the C-arm 9 to rotate in the CAU direction (see Figure 6). Figure 6 shows the C-arm 9 rotated in the CRA direction by an angle θCRA = 30°.

[0058] By using arm operating lever 41, the operator can manually fine-tune the rotation position of C-arm 9.

[0059] The touch panel 43 is used to perform an operation to store the rotation position of the C-arm 9, and displays a plurality of icon-type switches.

[0060] The rotation instruction switch 45 is a push button switch that moves the C-arm 9 to a predetermined rotation position. That is, by pressing the rotation instruction switch 45 while a specific rotation position stored using the touch panel 43 is selected, the C-arm 9 rotates toward the specific rotation position.

[0061] The end instruction switch 47 is a push button switch that is operated when a predetermined procedure for the subject M is completed. When the operator presses the end instruction switch 47, the X-ray imaging device 1 becomes capable of performing an operation related to the next procedure or an operation related to the end of the operation.

[0062] Although the description has been limited to the four operation devices related to adjusting the rotation position of the C-arm 9, the operation devices arranged on the operation console 39 are not limited to these four devices. Specifically, operation devices related to the operation of the X-ray imaging apparatus 1, such as a switch for switching the main power on / off, an examination start switch, a switch for setting X-ray imaging conditions, a switch for adjusting the position of the bed 3, and an emergency stop switch, are provided.

[0063] Next, a detailed description will be given of the configuration of touch panel 43. Fig. 11 is a diagram showing an example of the display screen of touch panel 43 in the initial state.

[0064] The touch panel 43 includes a set angle display section 70R, a memory switch group MS, a display section 56, and adjustment switches 57a and 57b. The set angle display unit 70R is an example of the "display unit" of the technology of the present disclosure.

[0065] The memory switch group MS includes a center switch 53 and a plurality of memory switches 55a to 55h.

[0066] The center switch 53 is disposed in the center of the memory switch group MS, and displays a human-shaped symbol representing the subject M in a supine position. The center switch 53 is used to return the C-arm 9 to its initial position.

[0067] Each of the memory switches 55a to 55h is disposed around the center switch 53. In this embodiment, the memory switch group MS includes eight memory switches 55a to 55h, as shown in Fig. 11. The number of memory switches 55a to 55h is not limited to eight and may be changed as appropriate.

[0068] In the memory switch group MS, each switch is associated with information about a rotation position. For example, the information about memory switch 55a corresponds to an angle of 30° from the initial position in the LAO direction and the CRA direction from the initial position shown in FIG. 2, and these are stored in the storage device 37. The information about memory switch 55b corresponds to an angle of 30° from the initial position in the LAO direction and an angle of 0° from the CAU direction from the initial position shown in FIG. 2, and these are stored in the storage device 37. Similarly, the information about memory switches 55c to 55h corresponds to the angles in each direction and are stored in the storage device 37.

[0069] The angles stored in the storage device 37 in association with the information of the memory switches 55a to 55h are representative examples of irradiation angles for imaging the region of the subject M that is the subject of examination.

[0070] 5, the CRA direction is the leftward direction and the LAO direction is the upward direction with respect to the position of the subject M. Therefore, the memory switch 55a, which stores the rotational position information for the CRA direction and the LAO direction, is arranged on the upper left side with respect to the center switch 53. Similarly, the arrangement positions of the memory switches 55b to 55h are determined according to the direction of the rotational position.

[0071] The display unit 56 and the adjustment switches 57a and 57b are used to adjust the angle defined by the memory switch group MS. For example, the operator can adjust the irradiation angle of the X-rays from the X-ray tube 5 by There may be cases where it is desired to adjust the angle corresponding to each of the memory switches 55a to 55h. As described above, the angles stored in correspondence with the information of the memory switches 55a to 55h are representative examples of irradiation angles for imaging the region of the subject M to be examined. However, the lesion site of the subject M varies from person to person. For example, if the lesion site is a blood vessel in the heart, angina pectoris or myocardial infarction may develop in that blood vessel. In such cases, the course shape of the coronary artery or the shape of the stenosis varies from person to person, so evaluation and treatment may be difficult using the representative irradiation angle stored in advance. Therefore, in order to make the lesion site more easily visible, it is necessary to manually change the representative irradiation angle to find the optimal angle.

[0072] For example, the operator may wish to change the angle of 30° in the CRA direction and the angle of 30° in the LAO direction corresponding to memory switch 55a to, for example, 20° and 35°, respectively. In this case, the operator designates (i.e., touches) memory switch 55a once. In this case, 30° is displayed on display unit 56 as the angles in the LAO and CRA directions. If you want to change the angle in the LAO direction from 30° to 20°, touch or hold down the minus (i.e., -) side of the adjustment switch 57a ten times. This changes the angle in the LAO direction from 30° to 20°. If you want to change the angle in the CRA direction from 30° to 35°, touch or hold down the plus (i.e., +) side of the adjustment switch 57b five times. This changes the angle in the CRA direction from 30° to 35°. Therefore, as shown in FIG. 11, the display unit 56 displays "LAO 20°" and "CRA 35°."

[0073] The method of adjusting the angle defined by the memory switch group MS is not limited to using the display unit 56 and the adjustment switches 57a and 57b. For example, a numeric keypad or the like may be provided and the optimum angle may be input using the numeric keypad or the like.

[0074] The set angle display unit 70R is a display unit that sorts and displays a plurality of set angles (LAO or RAO, CRA or CAU angles) for each of the current examination and previous examinations of the subject M under examination. Specifically, the set angle display unit 70R is a display unit that sorts and displays a plurality of set angles in order of the number of times X-ray imaging was performed or in chronological order of the date and time of X-ray imaging.

[0075] The set angle display unit 70R is provided with an instruction button 72BT for instructing that the multiple set angles be sorted and displayed in order of the number of times X-ray imaging was performed. The set angle display unit 70R is provided with an instruction button 74BT for instructing that the multiple set angles be sorted and displayed in chronological order of the date and time of X-ray imaging.

[0076] FIG. 11 shows an example in which a plurality of set angles are sorted and displayed in order of the number of times X-ray imaging has been performed.

[0077] The set angle display unit 70R includes a display area 76 that sorts and displays a plurality of set angles during the current examination of the subject M being examined. The display area 76 includes a display section 76A that displays the number of times, and display sections 76B and 76C that display the set angles.

[0078] The set angle display unit 70R includes a display area 78 that sorts and displays multiple set angles from previous examinations of the currently examined subject M. The display area 78 includes a display section 78A that displays the number of times, and display sections 78B and 78C that display the set angles.

[0079] The set angle display unit 70R includes a display area 80 that aggregates and sorts a plurality of set angles during the current examination and a plurality of set angles from previous examinations of the subject M being examined. The display area 80 includes a display section 80A that displays the number of times, and display sections 80B and 80C that display the set angles. The display sections 76B, 76C, 78B, 78C, 80B, and 80C and the rotation instruction switch 45 are an example of the "setting section" of the technology of the present disclosure.

[0080] Next, a description will be given of the display screen of the monitor 207. Fig. 12 is a diagram showing the display content of the monitor 207 and the relationship between the sizes of the display areas of the monitor 207 and the touch panel 43.

[0081] As described above, the monitor 207 displays the X-ray image generated by the image generating device 30 when X-ray photography is performed.

[0082] The display screen of the monitor 207 comprises an information table area 207A and an image display area 207B. The information table area 207A comprises a display section 207A1 that displays the date and time of X-ray imaging. For example, 9:15 a.m. on January 10, 2024 (2024.01.10.09.15) is displayed. The information table area 207A comprises a display section 207A2 that displays the X-ray setting angle during X-ray imaging. For example, the angle in the RAO direction is displayed as 35° and the angle in the CAU direction is displayed as 28°. The information table area 207A comprises a display section 207A3 that displays identification information of the subject M currently being examined. For example, patient A (i.e., identification number) is displayed.

[0083] In the image display area 207B, an X-ray image generated by the image generating device 30 is displayed.

[0084] 12, the size (i.e., area) of the display area of ​​touch panel 43 is smaller than the size of the display area of ​​monitor 207. The size of the display area of ​​touch panel 43 is, for example, 1 / 20 of the size of the display area of ​​monitor 207. Therefore, if an X-ray image is displayed on touch panel 43 and multiple set angles are displayed in a portion that does not overlap with the X-ray image, there is an inconvenient problem that the operator cannot or has difficulty viewing the X-ray image and the multiple set angles. Therefore, in this embodiment, an X-ray image is not displayed on touch panel 43, as shown in FIG.

[0085] (action) Next, the operation of the X-ray imaging system of this embodiment will be described. Fig. 13 is a flowchart of an example of an X-ray imaging processing program. The X-ray imaging processing program starts when a command to start the X-ray imaging processing is input, for example, by operating an examination start button (not shown). By executing the X-ray imaging processing program, the X-ray imaging processing and the X-ray imaging processing method are executed. When the examination start button is operated, identification information of the subject M is also input. This makes it possible to read information about the subject M identified by the identification information (such as the date and time of X-ray imaging and the set angle).

[0086] The X-ray imaging processing program is executed for each examination. During an examination, the lesion area of ​​the subject M may be X-rayed at the representative irradiation angle (i.e., the irradiation angle stored in the storage device 37), or the representative irradiation angle may be changed during the procedure to an optimum irradiation angle suited to the subject M. The representative irradiation angle is set using memory switches 55a to 55h. The representative irradiation angle is changed by manually operating adjustment switches 57a and 57b to change the irradiation angle designated by memory switches 55a to 55h.

[0087] In step 102, the judgment unit 72A judges whether or not a set angle is stored in the angle memory unit 61 of the own device (X-ray imaging device 1). If it is not judged that a set angle is stored in the angle memory unit 61 of the own device (X-ray imaging device 1), the X-ray imaging process proceeds to step 112. Note that the case where a set angle is not stored in the angle memory unit 61 occurs when the subject M is X-rayed for the first time in the examination.

[0088] If it is determined that the set angle is stored in the angle storage unit 61 of the own device (X-ray imaging device 1), the X-ray imaging process proceeds to step 104.

[0089] In step 104 , the reading unit 72 B reads the set angle from the angle storage unit 61 .

[0090] In step 106, the communication processing unit 72C controls the communication unit 55 to transmit to the server 100 a command to read the set angle stored in the storage device 102M of the server 100 in association with the identification information of the subject M and to transmit the read set angle to the X-ray imaging apparatus 1. As a result, the communication unit 55 transmits the command to the server 100. The server 100, having received the command, reads the set angle stored in the storage device 102M and transmits the read set angle to the X-ray imaging apparatus 1. The communication processing unit 72C receives the set angle from the server 100 via the communication unit 55. The order of the processing in step 104 and the processing in step 106 is not limited to this, and the processing may be performed in the reverse order.

[0091] In step 108, the sorting processing unit 72D sorts the set angles read out from the angle memory unit 61 and the set angles received from the server 100, and in step 110, the display processing unit 72E displays the set angles on the touch panel 43 in the sorted order.

[0092] 11 , the sorting processing unit 72D sorts the multiple set angles during the current examination, and the display processing unit 72E displays the multiple set angles during the current examination in sorted order in the display area 76 of the touch panel 43. The sorting processing unit 72D also sorts the multiple set angles of the previous examination, and the display processing unit 72E displays the multiple set angles of the previous examination in sorted order in the display area 78 of the touch panel 43. The sorting processing unit 72D also combines and sorts the multiple set angles during the current examination and the multiple set angles of the previous examination, and the display processing unit 72E displays the combined set angles (the multiple set angles during the current examination and the multiple set angles of the previous examination) in sorted order in the display area 80 of the touch panel 43.

[0093] As described above, the sorting order includes, first, the order of the number of times X-ray photography has been performed, and second, the chronological order of the date and time of X-ray photography. The X-ray photography processing program is set up so that the multiple set angles are first sorted in order of the number of times X-ray photography has been performed (in descending order).

[0094] The more times X-ray imaging has been performed, the more likely it is that the angle will be set compared to other setting angles, that is, it can be said that the setting angle is important for the subject M. Therefore, the operator can select the desired irradiation angle in a short time.

[0095] 11, the sorting processor 72D sorts the multiple set angles during the current examination, the multiple set angles from previous examinations, and the set angles combining the multiple set angles during the current examination and the multiple set angles from previous examinations in order of the number of times X-ray imaging has been performed. Specifically, the sorting processor 72D counts the number of times X-ray imaging has been performed for each set angle from the contents stored in the angle memory unit 61. The set angles are sorted in descending order of the number of times. The display processor 72E displays the number of times in the display section 76A and the multiple set angles during the current examination in the display sections 76B and 76C in sorted order. The display processing unit 72E displays the number of times in the display section 78A and the multiple set angles of the previous examinations in the display sections 78B and 78C in sorted order. As described above, the number of times X-ray imaging was performed for each set angle is also counted for the multiple set angles of the previous examinations. The set angles are sorted in descending order of the number of times. The display processing unit 72E displays the number of times in the display section 80A, and displays the set angles, which are a combination of the set angles for the current examination and the set angles for previous examinations, in display sections 80B and 80C in sorted order. Note that for the combined set angles, the number of times X-ray imaging has been performed for each set angle is also counted as described above. The set angles are sorted in descending order of the number of times.

[0096] In step 112, the judgment unit 72A judges whether the irradiation angle has been set by judging whether the set angle displayed in any of the display sections 76B, 76C, 78B, 78C, and 80B, 80C has been touched and the rotation instruction switch 45 has been operated.

[0097] If it is determined that the irradiation angle has been set, the X-ray imaging process proceeds to step 116. If it is not determined that the irradiation angle has been set, the X-ray imaging process proceeds to step 114.

[0098] In step 114, the determination unit 72A determines whether a change to another sort has been instructed. If it is determined that a change to another sort has not been instructed, the X-ray imaging process returns to step 112. If it is determined that a change to another sort has been instructed, the X-ray imaging process returns to step 108.

[0099] As described above, the sorting order is first determined to be the order of the number of times X-ray imaging has been performed (most frequently). The operator may wish to sort the multiple set angles in a different sorting order, i.e., in chronological order of the dates and times of X-ray imaging. In this case, the operator operates the instruction button 74BT (see FIG. 11). This results in a positive judgment in step 114 (step 114Y). In this case, in step 108, the sorting processing unit 72D sorts the multiple set angles during the current examination and the multiple set angles from the previous examination in chronological order of the dates and times of X-ray imaging. In step 110, the display processing unit 72E displays the multiple set angles during the current examination and the multiple set angles from the previous examination in chronological order of the dates and times of X-ray imaging. The chronological order of the dates and times of X-ray imaging refers to the order of the dates and times of X-ray imaging that are closest to the current time.

[0100] 14 is a diagram showing an example of the display content of the set angle display unit 70R of the touch panel 43, which displays multiple set angles in chronological order of the dates and times of X-ray imaging. As shown in FIG. 14, the set angle display unit 70R has a display area 77R that displays multiple set angles during the current examination in association with the imaging dates and times of X-ray imaging, in chronological order of the dates and times of X-ray imaging. The set angle display unit 70R also has a display area 79R that displays multiple set angles from a previous examination in association with the imaging dates and times of X-ray imaging, in chronological order of the dates and times of X-ray imaging.

[0101] Therefore, in step 110, the display processing unit 72E displays the multiple set angles and imaging dates and times during the current examination and the multiple set angles and imaging dates and times of the previous examination in the display areas 77R and 79R, respectively, in chronological order of the X-ray imaging dates and times. In this case, as will be described later, if the determination in step 128 is negative and the determination processing in step 114 is executed, when the instruction button 72BT is operated, the determination in step 114 becomes positive and the order of the number of imaging times becomes the sort order.

[0102] In step 116, angle control unit 72F controls the C-arm so that the irradiation angle becomes the set angle. As described above, the rotation position of C-arm 9 is detected based on the rotation direction and amount of rotation of drive motor M1 detected by rotary encoder R1 and the rotation direction and amount of rotation of drive motor M2 detected by rotary encoder R2. Therefore, angle control unit 72F controls the rotation direction and amount of rotation of drive motors M1 and M2 so that the irradiation angle becomes the set angle.

[0103] In step 118, the determination unit 72A determines whether an imaging instruction has been issued by determining whether the foot switch 204 has been operated. If it is determined that an imaging instruction has been issued, the X-ray imaging process proceeds to step 122. If it is not determined that an imaging instruction has been issued, the X-ray imaging process proceeds to step 120. In step 120, the determination unit 72A determines whether the angle has been changed. Note that the process of step 120 is similar to that of step 112, and therefore its description will be omitted. If it is not determined that the angle has been changed, the X-ray imaging process returns to step 118. If it is determined that the angle has been changed, the X-ray imaging process returns to step 116.

[0104] In step 122, the imaging processor 72G performs X-ray imaging. Specifically, the imaging processor 72G controls the X-ray tube 5 to irradiate X-rays. The X-rays irradiated from the X-ray tube 5 are limited to a predetermined shape by the collimator 17 and irradiated onto the subject M. The X-ray detector 7 detects the X-rays that have passed through the subject M, converts them into electrical signals, and outputs them as X-ray detection signals to the image generation device 30. The image generation device 30 generates an X-ray image based on the X-ray detection signals output from the X-ray detector 7 in accordance with instructions from the imaging processor 72G. The monitor 207 displays the X-ray image generated by the image generation device 30 in the image display area 207B in accordance with instructions from the imaging processor 72G. The monitor 207 displays the date and time of X-ray imaging in a display section 207A1, the X-ray irradiation angle during X-ray imaging in a display section 207A2, and identification information of the subject M currently being examined in a display section 207A3.

[0105] In step 124, the storage processing unit 72H stores the set angle set in step 116 in the angle storage unit 61 of its own device. In step 126, the communication processing unit 72C controls the communication unit 55 to transmit the set angle set in step 116 to the server 100. The server 100, which has received the set angle, stores information on the date and time (current time) when X-ray imaging was performed for each subject M in area 102D of the storage device 102M, and stores the LAO or RAO angle and the CAU or CRA angle in areas 102A1 to 102A4. The order of the processing in step 124 and the processing in step 126 is not limited to this, and the processing may be performed in the reverse order.

[0106] In step 128, the determination unit 72A determines whether an instruction to end the X-ray imaging process has been issued by determining whether the end instruction switch 47 has been operated. If it is determined that an instruction to end the X-ray imaging process has not been issued, the X-ray imaging process returns to step 102, and the above processes (steps 102 to 128) are executed. If it is determined that an instruction to end the X-ray imaging process has been issued, the X-ray imaging process ends.

[0107] (effect) In the embodiment described above, the desired irradiation angle can be selected from the multiple set angles for the current examination and the multiple set angles for previous examinations, i.e., from the multiple irradiation angles at which X-ray imaging was performed in the past, in a shorter time than with conventional technology.

[0108] Specifically, in the prior art, multiple pairs of X-ray images and irradiation angles are displayed, so it takes a long time to determine which of the irradiation angles is the desired irradiation angle, and as a result, it takes a long time to select the desired angle. Furthermore, when a display that allows selection is provided on the side of the patient's bed, the display area of ​​such a display is not large, so when multiple pairs are displayed, only a small number of pairs are displayed at a time. In this case, to find the desired irradiation angle, it is necessary to switch displays until the pair corresponding to the desired irradiation angle is displayed. As a result, it takes a long time to select the desired irradiation angle.

[0109] However, in this embodiment, multiple irradiation angles at which X-ray imaging was performed in the past are sorted and displayed. Therefore, a desired irradiation angle can be selected from multiple irradiation angles in a shorter time than with conventional techniques. Therefore, rotation of the C-arm 9 for irradiating X-rays at the desired irradiation angle can be completed more quickly than with conventional techniques, and X-ray imaging can be completed in a shorter time than with conventional techniques.

[0110] Furthermore, in this embodiment, when X-ray imaging is performed, the set angle is uniformly stored in the angle storage unit 61 and the storage device 102M, so the operator does not need to decide whether or not to store the angle during the procedure.

[0111] Specifically, conventional technology has a function to temporarily store multiple (e.g., three) set angles during a procedure. With this function, the stored irradiation angles are erased after the examination is completed. Since only three set angles can be temporarily stored, a decision must be made each time whether to set the set angle set for X-ray imaging again during the same procedure, which is difficult. In addition, the process of temporarily storing the set angle each time it is set is time-consuming. Furthermore, if the angle is forgotten to be temporarily stored, the C-arm must be moved to the new angle while making adjustments, which is time-consuming.

[0112] However, in this embodiment, when X-ray imaging is performed, the set angle is uniformly stored in the angle storage unit 61 and the storage device 102M, which eliminates the need for the above judgment and the above-mentioned troublesome work, allowing the operator to concentrate on the procedure.

[0113] As described above, even if the set angle during the procedure is temporarily stored, the stored irradiation angle is erased after the examination is completed. Therefore, if the set angle set in the previous examination is to be used in the current examination, it is necessary to adjust and move the C-arm from the beginning. However, in this embodiment, when X-ray imaging is performed, the set angle is uniformly stored in the angle storage unit 61 and the storage device 102M, and in the next examination, the stored multiple set angles are sorted and displayed. Therefore, the desired angle can be selected from the multiple set angles sorted and displayed, eliminating the need to adjust and move the C-arm from the beginning.

[0114] (Variation) <First Modification> In the above-described embodiment, the angle storage unit 61 in the storage device 37 of the X-ray imaging device 1 stores information on the date and time when X-ray imaging was performed and information on each angle in association with each other, as shown in Fig. 8. Also, the storage device 102M of the server 100 stores information on the date and time when X-ray imaging was performed and information on each angle in association with each other, as shown in Fig. 9. The technology of the present disclosure is not limited to this. The angle storage unit 61 and the storage device 102M may also store each angle in association with the number of times imaging was performed.

[0115] Fig. 15 is a conceptual diagram showing an example of the contents stored in the angle storage unit 61 of the X-ray imaging apparatus 1 of this modified example. Fig. 16 is a conceptual diagram showing an example of the contents stored in the storage device 102M of the server 100 of this modified example.

[0116] 15, the angle storage unit 61 includes an area 61K for storing the number of times X-ray imaging has been performed, and areas 61A1 to 61A4 for storing information on each of the angles CRA, CAU, LAO, and RAO. As shown in Fig. 16, the storage device 102M includes, for each subject M, an area 102K for storing the number of times X-ray imaging has been performed, and areas 102A1 to 102A4 for storing information on each of the angles CRA, CAU, LAO, and RAO.

[0117] <Second Modification> As described above, when X-ray imaging is performed, the set angles are uniformly stored in the angle storage unit 61 and the storage device 102M. Therefore, there are cases where the set angles stored in the angle storage unit 61 and the storage device 102M are not the set angles expected by the operator. Therefore, the set angles that are not the set angles expected by the operator may be deleted.

[0118] <Third Modification> In the embodiment described above, in step 102, the determination unit 72A determines whether a set angle is stored in the angle storage unit 61 of its own device (X-ray imaging device 1). That is, the determination unit 72A determines whether a set angle within the same examination is stored. The technology of the present disclosure is not limited to this. For example, the communication processing unit 72C controls the communication unit 55 so that the communication unit 55 transmits to the server 100 a command to transmit the determination result as to whether a set angle is stored in the storage device 102M of the server 100. As a result, the communication unit 55 transmits the command to the server 100. The server 100, having received the command, transmits the determination result as to whether a set angle is stored in the storage device 102M to the X-ray imaging device 1. The communication processing unit 72C receives the determination result via the communication unit 55. The determination unit 72A determines from the determination result whether a set angle is stored in the storage device 102M of the server 100. That is, the determination unit 72A determines whether or not the set angles for the current examination and the previous examination are stored.

[0119] <Fourth Modification> In the embodiment described above, information on the date and time of X-ray photography and irradiation angle for each of the current and previous examinations is stored in the storage device 102M of the server 100. The technology of the present disclosure is not limited to this. For example, the information stored in the storage device 102M may be stored in the storage device 37. This allows the server 100 to be omitted.

[0120] <Fifth Modification> In steps 112 and 120, the determination unit 72A determines whether the set angle displayed in any of the display sections 76B, 76C, 78B, 78C, and 80B, 80C has been touched and the rotation instruction switch 45 has been operated, thereby determining whether the irradiation angle has been set or changed. The technology of the present disclosure is not limited to this. For example, the set angle specified by touching the set angle displayed in any of the display sections 76B, 76C, 78B, 78C, and 80B, 80C may be set or changed by changing the adjustment switches 57a and 57b.

[0121] <Sixth Modification> In the embodiment described above, the storage device 37 of the X-ray imaging device 1 does not store X-ray images. However, the technology of the present disclosure is not limited to this. For example, the storage device 37 may store X-ray images. When storing X-ray images, the X-ray images are stored in association with information about the angle set at the time of X-ray imaging and the imaging date and time. For example, when a set angle displayed in any of the display sections 76B, 76C, 78B, 78C, 80B, and 80C is touched and the rotation instruction switch 45 is operated to set the irradiation angle and X-ray imaging is performed, the X-ray image obtained by this X-ray imaging and the previous X-ray image stored corresponding to the touched set angle may be displayed side by side on the monitor 207.

[0122] <Seventh Modification> In the above-described embodiment, the set angle displayed in any one of display sections 76B, 76C, 78B, 78C, 80B, and 80C of touch panel 43 is displayed in text. However, the technology of the present disclosure is not limited to this. For example, when a set angle displayed in any one of display sections 76B, 76C, 78B, 78C, 80B, and 80C is touched, the set angle may also be displayed on monitor 207 in a schematic diagram that simulates the irradiation angle of X-rays from X-ray tube 5, as shown in FIGS. 6 and 7 .

[0123] <Eighth Modification> In the above-described embodiment, the sorting order includes, first, the order of the number of times X-ray imaging has been performed, and, second, the chronological order of the dates and times of X-ray imaging. The technology of the present disclosure is not limited to this. For example, priority may be used. Specifically, priority setting buttons are further provided. The priority setting buttons include, for example, a priority setting button 1, a priority setting button 2, and a priority setting button 3. The operator specifies a set angle to be reused in the next examination and operates one of the priority setting buttons. This causes a wired order to be associated with the set angle and stored in the storage device 102M. Then, in step 108, the sorting processing unit 72D sorts the set angles in descending order of priority. The sorting processing unit 72D sorts set angles for which no associated priority is stored, for example, in order of the number of times X-ray imaging has been performed.

[0124] <Ninth Variation> In the above-described embodiment, in each examination, the subject M is placed in a supine position along the longitudinal direction of the bed 3. At this time, the position, posture, and orientation of the subject M are assumed to be the same as those of the previous examination. The technology of the present disclosure is not limited to this. An imaging unit (e.g., a camera) for imaging the subject M is provided, and the processor 72 controls the camera to image the subject M each time X-ray imaging is performed, and stores the image of the subject M corresponding to the set angle in the storage device 102M. When performing new X-ray imaging, the processor 72 compares the image of the subject M at this time with the image of the subject M corresponding to the specified set angle. The processor 72 calculates the amount of deviation in the position, posture, and orientation of the subject M from the comparison result, and corrects the set angle based on the calculated amount of deviation.

[0125] <Other variations> In the above embodiment, an example in which the X-ray imaging processing program 37P is stored in the storage device 37 has been described, but the technology of the present disclosure is not limited to this. For example, the X-ray imaging processing program 37P may be stored in a portable, computer-readable, non-transitory storage medium such as an SSD, a USB memory, or a magnetic tape. The X-ray imaging processing program 37P stored in the non-transitory storage medium is installed in the computer 70. The processor 54 executes the X-ray imaging processing in accordance with the X-ray imaging processing program 37P.

[0126] In addition, the X-ray imaging processing program 37P may be stored in a storage device such as another computer or server device connected to the X-ray imaging apparatus 1 via a network, and the X-ray imaging processing program 37P may be downloaded and installed in the X-ray imaging apparatus 1 in response to a request from the X-ray imaging apparatus 1.

[0127] It is not necessary to store the entire X-ray imaging processing program 37P in the storage device of another computer or server device connected to the X-ray imaging device 1, or in the storage device 37; only a portion of the X-ray imaging processing program 37P may be stored therein.

[0128] In the above embodiment, an example in which the technology of the present disclosure is realized by a software configuration has been described, but the technology of the present disclosure is not limited to this, and devices including an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a PLD (Programmable Logic Device) may also be applied. Also, a combination of a hardware configuration and a software configuration may be used.

[0129] The hardware resources for executing the X-ray imaging process described in the above embodiments can be various processors, as listed below. Examples of processors include a CPU, which is a general-purpose processor that functions as a hardware resource for executing X-ray imaging process by executing software, i.e., a program. Examples of processors include dedicated electronic circuits, such as FPGAs, PLDs, or ASICs, which are processors with a circuit configuration designed specifically for executing specific processes. Each processor has a built-in or connected memory, and each processor uses the memory to execute the X-ray imaging process.

[0130] The hardware resource for executing the X-ray imaging process may be configured with one of these various processors, or may be configured with a combination of two or more processors of the same or different types (for example, a combination of multiple FPGAs, or a combination of a CPU and an FPGA). Also, the hardware resource for executing the X-ray imaging process may be a single processor.

[0131] As an example of a system configured with one processor, first, one processor is configured by combining one or more CPUs and software, and this processor functions as a hardware resource that executes X-ray imaging processing. Second, there is a system that uses a processor that realizes the functions of the entire system, including multiple hardware resources that execute X-ray imaging processing, on a single IC (Integrated Circuit) chip, as typified by SoC (System-on-a-chip). In this way, X-ray imaging processing is realized using one or more of the above-mentioned various processors as hardware resources.

[0132] Furthermore, the hardware structure of these various processors can be, more specifically, an electronic circuit that combines circuit elements such as semiconductor elements. The above X-ray imaging process is merely an example. Therefore, it goes without saying that unnecessary steps may be deleted, new steps may be added, or the processing order may be changed, without departing from the spirit of the invention.

[0133] The above-described description and illustrations are a detailed explanation of the parts related to the technology of the present disclosure and are merely an example of the technology of the present disclosure. For example, the above description of the configuration, functions, actions, and effects is an explanation of an example of the configuration, functions, actions, and effects of the parts related to the technology of the present disclosure. Therefore, it goes without saying that unnecessary parts may be deleted, new elements may be added, or replacements may be made to the above-described description and illustrations within the scope of the gist of the technology of the present disclosure. Furthermore, to avoid confusion and facilitate understanding of the parts related to the technology of the present disclosure, the above-described description and illustrations omit explanations of common technical knowledge that do not require particular explanation to enable the implementation of the technology of the present disclosure.

[0134] All publications, patent applications, and technical standards mentioned in this specification are herein incorporated by reference to the same extent as if each individual publication, patent application, or technical standard was specifically and individually indicated to be incorporated by reference.

[0135] [Aspect] It will be understood by those skilled in the art that the above-described embodiments are specific examples of the following aspects.

[0136] (Section 1) an irradiation unit that irradiates the subject with X-rays; a detection unit disposed opposite the irradiation unit and configured to detect X-rays transmitted through the subject; a support unit that supports the irradiation unit and the detection unit so as to face each other and is rotatable around two orthogonal axes; a setting unit that sets an angle at which the X-rays are irradiated onto the subject; a control unit that controls the support unit so that the angle at which the X-rays are irradiated onto the subject becomes the set angle, and controls the irradiation unit so that X-ray imaging of the subject is performed; a storage unit that stores the set angle for each X-ray imaging when the X-ray imaging is performed multiple times; a display unit that sorts and displays the plurality of angles stored in the storage unit, When an angle displayed on the display unit is designated, the setting unit sets the designated angle as the angle. According to the X-ray imaging device of paragraph 1, a desired irradiation angle can be selected from a plurality of irradiation angles at which X-ray imaging has been performed in the past in a shorter time than with conventional techniques.

[0137] (Section 2) 2. The X-ray imaging apparatus according to claim 1, wherein the display unit sorts the plurality of angles in order of the number of times the X-ray imaging was performed or in chronological order of the dates and times of the X-ray imaging.

[0138] (Section 3) 3. The X-ray imaging apparatus according to claim 2, wherein the storage unit stores the set angle and the date and time when the X-ray imaging was performed at that angle, in association with each other, for each X-ray imaging.

[0139] (Section 4) 4. The X-ray imaging device according to claim 3, wherein when sorting the plurality of angles in order of the number of times the X-ray imaging was performed, the display unit counts the number of times the X-ray imaging was performed for each angle based on the contents stored in the memory unit.

[0140] (Section 5) the display unit sorts the plurality of angles in order of the number of times the X-ray imaging was performed; 3. The X-ray imaging apparatus according to claim 2, wherein the storage unit stores the set angle and the number of times the X-ray imaging has been performed at that angle in association with each other.

[0141] (Section 6) The storage unit a first storage unit that stores the set angle each time the X-ray imaging is performed in one examination of the subject; a second storage unit that stores the set angle when the X-ray imaging is performed in all examinations of the subject; 6. The X-ray imaging apparatus according to claim 1, comprising:

[0142] (Section 7) 7. The X-ray imaging apparatus according to claim 6, wherein the second storage unit is provided in an external device of the X-ray imaging apparatus.

[0143] (Section 8) 8. The X-ray imaging apparatus according to claim 6, wherein the display unit displays a plurality of angles stored in at least one of the first storage unit and the second storage unit.

[0144] (Section 9) 9. The X-ray imaging apparatus according to claim 1, wherein the storage unit stores the set angle for each of the same subjects.

[0145] (Section 10) 10. The X-ray imaging apparatus according to claim 1, further comprising a deletion unit that selectively deletes a plurality of angles stored in said storage unit.

[0146] (Section 11) 11. The X-ray imaging device according to claim 1, wherein the storage unit does not store the X-ray images.

[0147] (Section 12) a bed on which a subject is placed; an irradiation unit that irradiates the subject with X-rays; a detection unit disposed opposite the irradiation unit and configured to detect X-rays transmitted through the subject; a support unit that supports the irradiation unit and the detection unit so as to face each other and is rotatable around two orthogonal axes; a setting unit that sets an angle at which the X-rays are irradiated onto the subject; a control unit that controls the support unit so that the angle at which the X-rays are irradiated onto the subject becomes the set angle, and controls the irradiation unit so that X-ray imaging of the subject is performed; a storage unit that stores the set angle for each X-ray imaging when the X-ray imaging is performed multiple times; a display unit that is provided on a side of the bed and displays the plurality of angles stored in the storage unit without displaying the X-ray image obtained by performing the X-ray photography; Equipped with When an angle displayed on the display unit is designated, the setting unit sets the designated angle as the angle. According to the X-ray imaging device of the twelfth aspect, it is possible to prevent a situation in which multiple angles are not visible or are difficult to view in an X-ray image.

[0148] (Section 13) Another display unit that displays the X-ray image obtained by performing the X-ray photography, 13. The X-ray imaging apparatus according to claim 12, wherein the size of the display unit is smaller than the size of the other display unit.

[0149] (Section 14) the storage unit stores information relating to at least one of the number of times the X-ray imaging has been performed and information indicating the time of the X-ray imaging, in association with the set angle; 14. The X-ray imaging apparatus according to claim 12, wherein the display unit displays the set angle and information related to the X-ray imaging.

[0150] (Section 15) the storage unit stores information relating to at least one of the number of times the X-ray imaging has been performed and information indicating the time of the X-ray imaging, in association with the set angle; 14. The X-ray imaging apparatus according to claim 13, wherein the other display unit displays the set angle and information related to the X-ray imaging. [Explanation of symbols]

[0151] 1 X-ray equipment 3 berths 5 X-ray tube 7 X-ray detector 9C Arm 11 Arm holding member 23 Drive roller 25 gears 27 Pinion gear 72 processors 45 Rotation indicator switch 61 Angle memory section 70R Setting angle display section 76B, 76C, 78B, 78C, 80B, 80C display areas 102M storage device 207 Monitor M1 drive motor M2 drive motor

Claims

1. an irradiation unit that irradiates an object with X-rays; a detection unit disposed opposite the irradiation unit and configured to detect X-rays transmitted through the subject; a support unit that supports the irradiation unit and the detection unit so as to face each other and is rotatable about two orthogonal axes; a setting unit that sets an angle at which the X-rays are irradiated onto the subject; a control unit that controls the support unit so that the angle at which the X-rays are irradiated onto the subject becomes the set angle, and controls the irradiation unit so that X-ray imaging of the subject is performed; a storage unit that stores the set angle for each X-ray imaging when the X-ray imaging is performed multiple times; a display unit that sorts and displays the plurality of angles stored in the storage unit, When an angle displayed on the display unit is designated, the setting unit sets the designated angle as the angle.

2. The X-ray imaging apparatus according to claim 1 , wherein the display unit sorts the plurality of angles in order of the number of times the X-ray imaging has been performed or in chronological order of the dates and times of the X-ray imaging.

3. 3. The X-ray imaging apparatus according to claim 2, wherein the storage unit stores the set angle and the date and time when the X-ray imaging was performed at that angle, in association with each other, for each X-ray imaging.

4. 4. The X-ray imaging device according to claim 3, wherein when sorting the plurality of angles in order of the number of times the X-ray imaging was performed, the display unit counts the number of times the X-ray imaging was performed for each angle based on the contents stored in the storage unit.

5. the display unit sorts the plurality of angles in order of the number of times the X-ray imaging was performed; The X-ray imaging apparatus according to claim 2 , wherein the storage unit stores the set angle and the number of times the X-ray imaging has been performed at that angle in association with each other.

6. The storage unit a first storage unit that stores the set angle each time the X-ray imaging is performed in one examination of the subject; a second storage unit that stores the set angle when the X-ray imaging is performed in all examinations of the subject; 6. The X-ray imaging apparatus according to claim 1, further comprising:

7. The X-ray imaging apparatus according to claim 6 , wherein the second storage unit is provided in an external device of the X-ray imaging apparatus.

8. The X-ray imaging apparatus according to claim 6 , wherein the display unit displays a plurality of angles stored in at least one of the first storage unit and the second storage unit.

9. The X-ray imaging apparatus according to claim 1 , wherein the storage unit stores the set angle for each of the same subjects.

10. The X-ray imaging apparatus according to claim 1 , further comprising a deletion unit that selectively deletes a plurality of angles stored in the storage unit.

11. The X-ray imaging apparatus according to claim 1 , wherein the storage unit does not store the X-ray images.

12. a bed on which a subject is placed; an irradiation unit that irradiates the subject with X-rays; a detection unit disposed opposite the irradiation unit and configured to detect X-rays transmitted through the subject; a support unit that supports the irradiation unit and the detection unit so as to face each other and is rotatable about two orthogonal axes; a setting unit that sets an angle at which the X-rays are irradiated onto the subject; a control unit that controls the support unit so that the angle at which the X-rays are irradiated onto the subject becomes the set angle, and controls the irradiation unit so that X-ray imaging of the subject is performed; a storage unit that stores the set angle for each X-ray imaging when the X-ray imaging is performed multiple times; a display unit that is provided on a side of the bed and displays the plurality of angles stored in the storage unit without displaying the X-ray image obtained by performing the X-ray imaging; Equipped with When an angle displayed on the display unit is designated, the setting unit sets the designated angle as the angle.

13. Further, another display unit is provided for displaying an X-ray image obtained by performing the X-ray imaging, The X-ray imaging apparatus according to claim 12 , wherein the size of the display unit is smaller than the size of the other display unit.

14. the storage unit stores information relating to at least one of the X-ray imaging, which is information indicating the number of times the X-ray imaging has been performed and information indicating the time of the X-ray imaging, in association with the set angle; 14. The X-ray imaging apparatus according to claim 12, wherein the display unit displays the set angle and information related to the X-ray imaging.

15. the storage unit stores information relating to at least one of the X-ray imaging, which is information indicating the number of times the X-ray imaging has been performed and information indicating the time of the X-ray imaging, in association with the set angle; The X-ray imaging apparatus according to claim 13 , wherein the other display unit displays the set angle and information related to the X-ray imaging.

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