CT device

Abstract

The utility model discloses a CT (Computed Tomography) device and belongs to the technical field of CT imaging. The multi-source CT device solves the problem that the cost is high due to the fact that rotation and data transmission of a detector need to depend on a slip ring and the requirement of a machine frame is high in an existing multi-source CT device. The device comprises a first detector assembly, a second detector assembly, a radiation source assembly and a fixed base. The first detector assembly comprises a first detector ring; the second detector assembly comprises a second detector ring; the ray source assembly comprises a rotating mechanism and a plurality of ray sources, and the ray sources are fixed on the rotating mechanism; the first detector ring and the second detector ring are parallel, and a gap is formed between the first detector ring and the second detector ring and directly faces a ray emission port of the ray source; the two detector rings are arranged on the inner side of a ring defined by the radiation sources; the radiation source rotates relative to the fixed base; the two detector rings are static relative to the fixed base. The two detector rings are static, slip rings are not arranged for the detector rings, the rack requirement is low, and the cost of the CT device is low.

Description

Technical Field

[0001] The utility model relates to the technical field of CT imaging, in particular to a CT device. Background Art

[0002] CT (Computed Tomography), or electronic computer tomography, uses precisely collimated X-ray beams, gamma rays, ultrasound, etc., together with highly sensitive detectors to perform cross-sectional scanning around the object to be tested. The layout of the radiation source and detector in the existing multi-source layout CT device is as follows:

[0003] The rotating mechanism drives the radiation source and the detector to rotate, and includes multiple imaging systems (a radiation source and the corresponding detector). Each imaging system can work independently. The scanning speed in this case is determined by the rotation speed and the number of imaging systems. The faster the rotation speed, the more imaging systems there are, and the faster the scanning speed. However, since multiple imaging systems need to be arranged in a limited space, the load on the entire CT device is large, and the centrifugal force on the components increases with the square of the rotation speed. The increase in scanning speed places high requirements on the performance of the frame, resulting in high frame costs, and thus high costs for the CT device. In addition, since the detector needs to rely on slip rings to transmit a large amount of data, the cost of the slip rings is high, resulting in the problem of high overall cost of the CT device. Utility Model Content

[0004] In view of the above analysis, the utility model aims to provide a CT device to solve the problem that the existing multi-source CT device has a high overall cost due to the need to rely on slip rings for detector rotation and data transmission, and the high cost of slip rings. The existing multi-source CT device also has a problem that the rack cost is high due to the large load and the increased requirements for the rack, which ultimately leads to the high overall cost of the CT device.

[0005] The purpose of this utility model is mainly achieved through the following technical solutions:

[0006] The utility model provides a CT device, comprising a first detector assembly, a second detector assembly, a ray source assembly and a fixed base;

[0007] The first detector assembly, the second detector assembly, and the radiation source assembly are arranged on a fixed base;

[0008] The first detector assembly includes a first detector ring;

[0009] The second detector assembly includes a second detector ring;

[0010] The radiation source assembly includes a rotating mechanism and a plurality of radiation sources, and the radiation sources are fixed on the rotating mechanism;

[0011] The first detector ring and the second detector ring are arranged in parallel with a gap arranged therebetween, the gap being directly opposite to the ray emission port of the ray source;

[0012] The first detector ring and the second detector ring are arranged inside the ring surrounded by the radiation source;

[0013] The radiation source performs rotational motion relative to the fixed base;

[0014] The first detector ring and the second detector ring are stationary relative to the fixed base.

[0015] Further, the first detector ring includes a first detector fixing seat and a first detector;

[0016] The first detector fixing seat includes a first annular structure;

[0017] A first detector is arranged on the inner wall of the first annular structure.

[0018] Furthermore, the first detectors are continuously arranged along the circumferential direction of the inner wall of the first annular structure.

[0019] Further, the first detector assembly also includes a first connecting ring, a first connecting member and a first supporting member;

[0020] The first connecting ring is connected to the first detector fixing seat through the first connecting member;

[0021] The first connecting ring is also connected to the fixed base through the first supporting member.

[0022] Furthermore, the first detector assembly also includes a first adjustment limit assembly;

[0023] The first adjustment and limiting assembly includes a first limiting groove, a first limiting slider and a first driving assembly;

[0024] The first limiting groove matches the first limiting sliding block and is arranged on the first supporting member;

[0025] The first limiting slider is arranged on the first connecting ring;

[0026] The first driving assembly is connected to the first connecting ring.

[0027] Further, the second detector ring includes a second detector fixing seat and a second detector;

[0028] The second detector fixing seat includes a second annular structure;

[0029] A second detector is disposed on the inner wall of the second annular structure;

[0030] The second detectors are continuously arranged along the circumferential direction of the inner wall of the second annular structure.

[0031] Further, the second detector assembly also includes a second connecting ring, a second connecting member and a second supporting member;

[0032] The second connecting ring is connected to the second detector fixing seat through the second connecting piece;

[0033] The second connecting ring is also connected to the fixed base through the second supporting member.

[0034] Furthermore, the second detector assembly also includes a second adjustment limit assembly;

[0035] The second adjustment and limiting assembly includes a second limiting groove, a second limiting slider and a second driving assembly;

[0036] The second limiting groove matches the second limiting sliding block and is arranged on the second supporting member;

[0037] The second limiting slider is arranged on the second connecting ring;

[0038] The second driving assembly is connected to the second connecting ring.

[0039] Furthermore, a plurality of ray sources are arranged on the rotating mechanism at equal intervals.

[0040] Furthermore, the radiation source assembly also includes a slip ring and a third support member;

[0041] The slip ring is sleeved outside the rotating mechanism and is rotationally connected to the rotating mechanism;

[0042] The slip ring, the third support member and the fixed base are connected in sequence.

[0043] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0044] 1. The utility model realizes spiral scanning of the CT device by setting the ray source on the rotating mechanism and rotating with the rotating mechanism, and setting the two detector mechanisms on the fixed base and not rotating relative to the fixed base. Since the two detector mechanisms do not rotate, there is no need to consider the problem of detector data transmission and reception caused by rotation during the scanning process, that is, there is no need to configure a slip ring matching the detector ring, thereby reducing the overall cost of the CT device. At the same time, when the CT device of the utility model is equipped with a large number of ray sources, under the condition of a certain scanning speed, the rotation speed can be relatively slow, reducing the rack load and the requirements for the rack, thereby reducing the overall cost of the CT device.

[0045] 2. The first detector assembly and the second detector assembly of the utility model are arranged on a fixed base and do not rotate relative to the fixed base. That is, during operation, only the radiation source rotates, and the first detector ring and the second detector ring do not rotate. Therefore, there is no need to consider the data collection and transmission of each detector on each detector ring during the rotation process, which reduces the difficulty of installing the second detector ring.

[0046] 3. In the process of imaging small objects, in order to obtain higher image resolution, it is necessary to select a radiation source with a smaller focus. However, the existing detector is relatively static with the radiation source during the working process. In order to ensure the image forming accuracy, it is impossible to select a radiation source with a smaller focus, resulting in a large size of the existing CT device. However, in the working process of the CT device of the utility model, only the radiation source rotates, and the first detector ring and the second detector ring do not rotate. Therefore, a radiation source with a smaller focus can be selected, the size of the imaging device is reduced, and a miniaturized imaging device is obtained.

[0047] 4. The device of the utility model includes a plurality of ray sources uniformly arranged along the circumference of the rotating mechanism. The plurality of ray sources rotate with the rotating mechanism, and the ray sources switch to emit rays alternately. Only one ray source works at the same time. On the one hand, the ray source makes a plurality of spiral motions relative to the inspected object, which is equivalent to the ray source performing a spiral scan on the scanned object. On the other hand, it ensures that the two detector rings continuously receive the signal data emitted by the ray source after penetrating the inspected object.

[0048] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by implementing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components.

[0050] Figure 1 It is a structural schematic diagram of a CT device of the utility model;

[0051] Figure 2 is a structural schematic diagram of a first detector assembly;

[0052] Figure 3 is a schematic structural diagram of the first detector ring;

[0053] Figure 4 is a structural schematic diagram of a second detector assembly;

[0054] Figure 5 is a schematic diagram of the structure of the second detector ring;

[0055] Figure 6 is a schematic diagram of the structure of a ray source assembly;

[0056] Figure 7It is a structural schematic diagram of a spiral line generated during the rotation of a ray source in a CT device of the utility model;

[0057] Reference numerals:

[0058] 100 - first detector assembly, 200 - second detector assembly, 300 - radiation source assembly, 400 - fixed base, 500 - conveyor belt, 600 - conveyor belt bracket, 700 - detected object;

[0059] 101 - first detector ring, 102 - first connecting ring, 103 - first connecting member, 104 - first supporting member, 105 - first adjusting and limiting assembly;

[0060] 1011-first detector fixing seat, 1012-first detector;

[0061] 1051-first limiting groove, 1052-first limiting slider;

[0062] 201 - second detector ring, 202 - second connecting ring, 203 - second connecting member, 204 - second supporting member, 205 - second adjusting and limiting assembly;

[0063] 2011-Second detector fixing base, 2012-Second detector;

[0064] 2051-second limiting groove, 2052-second limiting slider;

[0065] 301 - rotating mechanism, 302 - radiation source, 303 - slip ring, 304 - third support member. DETAILED DESCRIPTION

[0066] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0067] Example

[0068] A specific embodiment of the utility model discloses a CT device, such as Figure 1 , Figure 2 and Figure 4As shown, it includes a first detector assembly 100, a second detector assembly 200, a radiation source assembly 300 and a fixed base 400; the first detector assembly 100, the second detector assembly 200, and the radiation source assembly 300 are arranged on the fixed base 400; the first detector assembly 100 includes a first detector ring 101; the second detector assembly 200 includes a second detector ring 201; the radiation source assembly 300 includes a rotating mechanism 301 and a plurality of radiation sources 302, and the radiation sources 302 are fixed on the rotating mechanism 301; the first detector ring 101 and the second detector ring 201 are arranged in parallel with a gap therebetween, and the gap is directly opposite to the radiation emission port of the radiation source 302; the first detector ring 101 and the second detector ring 201 are arranged on the inner side of a ring surrounded by the radiation source 302; the radiation source 302 rotates relative to the fixed base 400; the first detector ring 101 and the second detector ring 201 are stationary relative to the fixed base 400.

[0069] In this embodiment, the ray source 302 is arranged on the rotating mechanism 301 and rotates with the rotating mechanism 301, and the first detector assembly 100 and the second detector assembly 200 are arranged on the fixed base 400 and are stationary relative to the fixed base 400, that is, during the rotation operation, the ray sources work alternately and only one ray source works at the same time, so that the CT device in this embodiment can achieve spiral scanning during the detection operation process. Because the two detector mechanisms do not rotate, there is no need to consider the problem of detector data transmission and reception caused by rotation during the scanning process, that is, there is no need to configure a slip ring matching the detector ring, thereby reducing the overall cost of the CT device. At the same time, when the CT device of this embodiment is equipped with a large number of ray sources, under the condition of a certain scanning speed, the rotation speed can be relatively slow, the rotation speed can be relatively slow, the load of the rack is reduced, and the requirements for the rack are reduced, so as to reduce the overall cost of the CT device.

[0070] In this embodiment, the first detector ring 101 and the second detector ring 201 are in a stationary state relative to the fixed base 400, that is, during operation, only the radiation source rotates, and the first detector ring 101 and the second detector ring 201 do not rotate. Therefore, there is no need to consider the data collection and transmission of the first detector on the first detector ring 101 and the second detector on the second detector ring 201 during the rotation process, thereby reducing the installation difficulty and cost of the detector unit.

[0071] In this embodiment, when the CT device of this embodiment is used for CT scanning, the object 700 to be inspected moves forward with the conveyor belt, and the radiation source 302 rotates with the rotating mechanism 301. During the rotation, the multiple radiation sources 302 switch to work in a clockwise or counterclockwise order at a certain time interval, and the first detector ring 101 and the second detector ring 201 simultaneously receive the radiation penetration signal emitted by the same radiation source.

[0072] During the CT scanning of the object 700 to be inspected, in order to obtain a higher image resolution, a ray source with a smaller focus needs to be selected. However, the existing detector is relatively stationary with the ray source during operation, that is, they rotate or are stationary at the same time. In order to ensure the image forming accuracy, a ray source with a smaller focus cannot be selected, resulting in a large size of the existing CT device. During the operation of the CT device of this embodiment, only the ray source rotates, and the two detector rings do not rotate. A ray source with a smaller focus can be selected, which reduces the size of the imaging device and obtains a miniaturized CT device.

[0073] Furthermore, in order to ensure that the radiation signal emitted by the radiation source 302 is received by the first detector ring 101, the first detector ring 101 is provided to include a first detector fixing seat 1011 and a first detector 1012. Figure 3 As shown, the first detector fixing seat 1011 includes a first annular structure, and the first detector 1012 is arranged on the inner wall of the first annular structure. This arrangement makes the signal receiving surface of the first detector 1012 face the ray source 302, ensuring that the first detector 1012 receives the ray signal emitted by the ray source 302 arranged opposite to it.

[0074] In this embodiment, because the radiation source emits radiation during rotation and the radiation penetrates the inspected object 700, to ensure that all the transillumination signals penetrating the inspected object 700 are received, the first detectors 1012 are continuously arranged along the circumference of the inner wall of the first annular structure.

[0075] In this embodiment, in order to enhance the reception of the penetration signal after penetrating the detected object 700, multiple rows of first detectors 1012 are arranged along the axial direction of the first annular structure to obtain more penetration signals to improve the imaging quality.

[0076] Furthermore, considering the fixation of the first detector ring 101, the first detector assembly 100 further includes a first connecting ring 102, a first connecting member 103 and a first supporting member 104, such as Figure 2 As shown, the first connecting ring 102 is connected to the first detector fixing seat 1011 through the first connecting member 103 , and the first connecting ring 102 is also connected to the fixing base 400 through the first supporting member 104 .

[0077] In this embodiment, the first connecting ring 102 is fixedly connected to the fixed base 400 and the position thereof is fixed. At this time, the distance between the first connecting ring 102 and the rotating mechanism 301 is not adjustable.

[0078] Furthermore, considering that the spacing between the first detector ring 101 and the rotating mechanism 301 is adjustable, the gap spacing between the first detector ring 101 and the second detector ring 201 is finally adjustable. The first detector assembly 100 further includes a first adjustment limit assembly 105, such as Figure 2 As shown, the first adjustment limit assembly 105 includes a first limit groove 1051, a first limit slider 1052 and a first drive assembly; the first limit groove 1051 matches the first limit slider 1052 and is arranged on the first support member 104; the first limit slider 1052 is arranged on the first connecting ring 102; and the first drive assembly is connected to the first connecting ring 102.

[0079] In this embodiment, the first drive component includes a first drive motor and a first drive connector. The first drive motor is connected to the first connecting ring 102 through the first drive connector to drive the first connecting ring 102 to move axially along the first connecting ring 102 in the first limiting groove 1051, thereby driving the first detector ring 101 to approach or move away from the rotating mechanism 301, thereby achieving adjustable gap spacing between the first detector ring 101 and the second detector ring 201.

[0080] Furthermore, in order to ensure that the radiation signal emitted by the radiation source 302 is received by the second detector ring 201, the second detector ring 201 includes a second detector fixing seat 2011 and a second detector 2012. Figure 5 As shown; the second detector fixing seat 2011 includes a second annular structure, and a second detector 2012 is arranged on the inner wall of the second annular structure. This arrangement makes the signal receiving surface of the second detector 2012 face the ray source 302, ensuring that the second detector 2012 receives the ray signal emitted by the ray source 302 arranged opposite to it.

[0081] In this embodiment, because the radiation source 302 emits radiation during rotation and the radiation penetrates the inspected object 700, to ensure that all the transillumination signals penetrating the inspected object 700 are received, the second detectors 2012 are continuously arranged along the circumference of the inner wall of the second annular structure.

[0082] In this embodiment, in order to enhance the reception of the radiation signal after penetrating the inspected object 700, multiple rows of second detectors 2012 are arranged along the axial direction of the second annular structure to obtain more radiation penetration signals to improve the imaging quality.

[0083] Furthermore, considering the fixation of the second detector ring 201, the second detector assembly 200 further includes a second connecting ring 202, a second connecting member 203 and a second supporting member 204, such as Figure 4 As shown, the second connecting ring 202 is connected to the second detector fixing seat 2011 through the second connecting member 203 , and the second connecting ring 202 is also connected to the fixing base 400 through the second supporting member 204 .

[0084] In this embodiment, the second connecting ring 202 is fixedly connected to the fixed base 400 and the position thereof is fixed. At this time, the distance between the second connecting ring 202 and the rotating mechanism 301 is not adjustable.

[0085] Furthermore, considering that the spacing between the second detector ring 201 and the rotating mechanism 301 is adjustable, the gap spacing between the first detector ring 101 and the second detector ring 201 is finally adjustable. The second detector assembly 200 further includes a second adjustment limit assembly 205, such as Figure 4 As shown, the second adjustment limit assembly 205 includes a second limit groove 2051, a second limit slider 2052 and a second drive assembly; the second limit groove 2051 matches the second limit slider 2052 and is arranged on the second support member 204; the second limit slider 2052 is arranged on the second connecting ring 202, and the second drive assembly is connected to the second connecting ring 202.

[0086] In this embodiment, the second drive assembly includes a second drive motor and a second drive connector. The second drive motor is connected to the second connecting ring 202 through the second drive connector to drive the second connecting ring 202 to move axially along the second connecting ring 202 in the second limiting groove 2051, thereby driving the second detector ring 201 to approach or move away from the rotating mechanism 301, thereby achieving adjustable gap spacing between the first detector ring 101 and the second detector ring 201.

[0087] In this embodiment, the first adjustment stopper assembly 105 and the second adjustment stopper assembly 205 are provided on the CT device at the same time, and the gap spacing between the first detector ring 101 and the second detector ring 201 is adjusted before scanning, and the first detector ring 101 and the second detector ring 201 are fixed. The gap spacing between the first detector ring 101 and the second detector ring 201 can also be adjusted by only providing any one of the first adjustment stopper assembly 105 and the second adjustment stopper assembly 205 on the CT device, that is, the position of one detector ring is adjusted and the position of the other detector ring is fixed.

[0088] Furthermore, in order to ensure that the signals emitted by the first detector 1012 and the second detector 2012 are consistent and to facilitate subsequent signal processing, the first detector 1012 and the second detector 2012 have the same structure and type.

[0089] Furthermore, the plurality of ray sources 302 are arranged on the rotating mechanism 301 at equal intervals, and the plurality of ray sources 302 rotate synchronously with the rotating mechanism 301 counterclockwise or clockwise.

[0090] In this embodiment, during scanning by the CT device, only one ray source among the multiple ray sources 302 is working at the same time, so as to ensure that the first detector ring 101 and the second detector ring 201 can only receive signal data from the same ray source at the same time.

[0091] In this embodiment, the radiation source 302 emits radiation that passes through the gap and the detected object 700 in sequence and is then received by the first detector 1012 on the first detector ring 101 and the second detector 2012 on the second detector ring 201 .

[0092] In this embodiment, the ray source is switched continuously, that is, only one ray source is working at the same time, and each detector is always in working state, and is in the state of continuously receiving the transillumination signal of the ray emitted by the ray source 302 after penetrating the detected object, which is equivalent to N sources emitting rays at the same time, but after one rotation, the projection angle corresponding to each ray source is relatively sparse, and the number of projection angles is 1 / N of that when a single ray source is working. Therefore, in this scanning mode, since there are N ray sources, the projection data of N spiral lines are obtained, such as Figure 7 As shown, the pitch is greatly increased. When the rotation speed of the rotating mechanism is constant, the scanning speed can be greatly increased by adjusting the transmission speed of the conveyor belt in the security inspection channel.

[0093] Furthermore, considering the rotation and installation of the rotating mechanism 301, the radiation source assembly 300 further includes a slip ring 303 and a third support member 304, such as Figure 6 As shown, the slip ring 303 is sleeved outside the rotating mechanism 301 and is rotatably connected to the rotating mechanism 301. The slip ring 303, the third support member 304 and the fixed base 400 are connected in sequence. The slip ring 303 has no requirement for transmitting data, the disk body is relatively small, and the cost is relatively low.

[0094] Furthermore, in order to facilitate the transmission of the inspected object, the rotating mechanism 301 is a circular rotating mechanism.

[0095] Furthermore, the CT device of this embodiment further includes a conveyor belt 500, such as Figure 1 As shown, the conveyor belt 500 is composed of a first detector ring 101 , a second detector ring 201 and a hollow part of a rotating mechanism 301 to form a security inspection channel, and transmits the inspected object 700 through a scanning area formed by the radiation emitted by the radiation source 302 .

[0096] Furthermore, the CT device of this embodiment also includes a control computer, which is respectively connected to the conveyor belt 500, the first detector ring 101, the second detector ring 201, the radiation source 302 and the rotating mechanism 301; the control computer is used to control the conveying direction and conveying speed of the conveyor belt 500; the control computer is used to receive data signals transmitted by the first detector ring 101 and the second detector ring 201; the control computer is used to control how the radiation source 302 works; and the control computer is used to control the rotation speed of the rotating mechanism 301.

[0097] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A CT device, characterized in that: It comprises a first detector assembly (100), a second detector assembly (200), a ray source assembly (300) and a fixed base (400); The first detector assembly (100), the second detector assembly (200), and the radiation source assembly (300) are arranged on the fixed base (400); The first detector assembly (100) comprises a first detector ring (101); The second detector assembly (200) comprises a second detector ring (201); The radiation source assembly (300) comprises a rotating mechanism (301) and a plurality of radiation sources (302), wherein the radiation sources (302) are fixed on the rotating mechanism (301); The first detector ring (101) and the second detector ring (201) are arranged in parallel with a gap provided therebetween, the gap being directly opposite to a ray emission port of the ray source (302); The first detector ring (101) and the second detector ring (201) are arranged inside a ring surrounded by the radiation source (302); The radiation source (302) performs rotational motion relative to the fixed base (400); The first detector ring (101) and the second detector ring (201) are stationary relative to the fixed base (400).

2. The CT device according to claim 1, characterized in that: The first detector ring (101) comprises a first detector fixing seat (1011) and a first detector (1012); The first detector fixing seat (1011) comprises a first annular structure; The first detector (1012) is arranged on the inner wall of the first annular structure.

3. The CT device according to claim 2, characterized in that: The first detectors (1012) are arranged continuously along the circumference of the inner wall of the first annular structure.

4. The CT device according to claim 2, characterized in that: The first detector assembly (100) further comprises a first connecting ring (102), a first connecting member (103) and a first supporting member (104); The first connecting ring (102) is connected to the first detector fixing seat (1011) via the first connecting member (103); The first connecting ring (102) is also connected to the fixed base (400) via the first supporting member (104).

5. The CT device according to claim 4, characterized in that: The first detector assembly (100) further comprises a first adjustment and limiting assembly (105); The first adjustment and limiting assembly (105) comprises a first limiting groove (1051), a first limiting sliding block (1052) and a first driving assembly; The first limiting groove (1051) matches the first limiting sliding block (1052) and is arranged on the first supporting member (104); The first limiting sliding block (1052) is arranged on the first connecting ring (102); The first driving assembly is connected to the first connecting ring (102).

6. The CT device according to claim 1, characterized in that: The second detector ring (201) comprises a second detector fixing seat (2011) and a second detector (2012); The second detector fixing seat (2011) comprises a second annular structure; The second detector (2012) is arranged on the inner wall of the second annular structure; The second detectors (2012) are arranged continuously along the circumference of the inner wall of the second circular structure.

7. The CT device according to claim 6, characterized in that: The second detector assembly (200) further comprises a second connecting ring (202), a second connecting member (203) and a second supporting member (204); The second connecting ring (202) is connected to the second detector fixing seat (2011) via the second connecting member (203); The second connecting ring (202) is also connected to the fixed base (400) via the second supporting member (204).

8. The CT device according to claim 7, characterized in that: The second detector assembly (200) further comprises a second adjustment and limiting assembly (205); The second adjustment and limiting assembly (205) comprises a second limiting groove (2051), a second limiting sliding block (2052) and a second driving assembly; The second limiting groove (2051) matches the second limiting sliding block (2052) and is arranged on the second supporting member (204); The second limiting sliding block (2052) is arranged on the second connecting ring (202); The second driving assembly is connected to the second connecting ring (202).

9. The CT device according to claim 1, characterized in that: The plurality of ray sources (302) are arranged at equal intervals on the rotating mechanism (301).

10. The CT device according to claim 1, characterized in that: The radiation source assembly (300) further comprises a slip ring (303) and a third support member (304); The slip ring (303) is sleeved outside the rotating mechanism (301) and is rotationally connected to the rotating mechanism (301); The slip ring (303), the third support member (304) and the fixed base (400) are connected in sequence.

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