A CT device with adjustable magnification ratio

Abstract

The utility model provides a kind of CT equipment of amplification ratio adjustable, including scanning frame, there is opposite and set up ray source and detector on the scanning frame;Spacing adjusting device is equipped on the scanning frame, and the spacing adjusting device is used to adjust the spacing between ray source and detector, to change the amplification ratio of CT equipment, to facilitate to meet the imaging demand of multiple sizes measured object.

Description

Technical Field

[0001] This utility model belongs to the field of imaging equipment technology, specifically relating to a CT device with adjustable magnification ratio. Background Technology

[0002] CT scanners are important imaging devices widely used in non-destructive testing, clinical diagnosis, and other technical fields. The working principle of a CT scanner is to use X-rays to penetrate the object being tested, such as a workpiece or the human body, and then receive the attenuated X-rays through a detector. Based on these attenuated X-rays, an internal image of the object being tested is constructed.

[0003] In practical applications, the magnification ratio of CT equipment is a key factor affecting image quality. Currently, the magnification ratio of CT equipment is a fixed value, which is only suitable for imaging needs of objects of specific sizes. It cannot flexibly meet the imaging needs of objects of various sizes (for example, when scanning and imaging large objects, it cannot cover the entire object, affecting the imaging efficiency of the entire object; when imaging small objects, it will lose image details, affecting the imaging accuracy of the object). It has the defect of poor versatility. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a CT device with adjustable magnification ratio.

[0005] To achieve the above and other related objectives, this utility model provides a CT device with adjustable magnification, including a scanning gantry on which an X-ray source and a detector are disposed opposite each other. The scanning gantry is provided with a spacing adjustment device, which is used to adjust the spacing between the X-ray source and the detector to change the magnification of the CT device, thereby facilitating the imaging needs of objects of various sizes.

[0006] Preferably, the spacing adjustment device includes a first moving mechanism and / or a second moving mechanism; the first moving mechanism is used to adjust the position of the X-ray source in a first direction, and the second moving mechanism is used to adjust the position of the detector in the first direction; the first direction is the emission centerline direction of the X-ray source; this application changes the magnification ratio of the CT equipment by adjusting the distance from the X-ray source to the object being measured and / or the distance from the detector to the object being measured, thereby meeting the imaging requirements of objects of various sizes.

[0007] Preferably, the first moving mechanism includes a first linear drive mechanism for driving the radiation source closer to or away from the detector; the second moving mechanism includes a second linear drive mechanism for driving the detector closer to or away from the radiation source; thus, automatic adjustment of the amplification ratio can be achieved, improving the convenience of amplification ratio adjustment.

[0008] Preferably, each moving mechanism includes an adjusting plate and a locking bolt. The adjusting plate is provided with a groove extending along a first direction, and the bolt rod of the locking bolt passes through the groove and is threadedly connected to the scanning frame, thereby meeting the need for adjusting the magnification ratio at low cost.

[0009] Preferably, the scanning gantry is provided with a first position detector and / or a second position detector; the first position detector is used to identify the position of the X-ray source in a first direction, and the second position detector is used to identify the position of the detector in the first direction, which is beneficial to achieve accurate adjustment of the magnification ratio.

[0010] Preferably, the scanning frame includes a frame and a rotating component, the rotating component being rotatably mounted on the frame; the X-ray source, detector, first moving mechanism and second moving mechanism are all mounted on the rotating component, and the emission center line of the X-ray source intersects perpendicularly with the rotation center line of the rotating component; the rotating component drives the X-ray source and detector to rotate together, which facilitates the realization of three-dimensional imaging of the object under test.

[0011] Preferably, the rotating component includes an inner ring of a bearing, and the outer ring of the bearing is fixed to the frame.

[0012] Preferably, the frame is provided with a power mechanism to drive the rotating components to rotate, so as to improve the efficiency of rotating scanning of the object under test.

[0013] Preferably, the CT equipment includes a cable carrier for cable routing; one end of the cable carrier is connected to the frame, and the other end of the cable carrier is connected to a rotating component.

[0014] Preferably, the radiation source is mounted on the first moving mechanism via a first position fine-tuning device, and the detector is mounted on the second moving mechanism via a second position fine-tuning device; adjusting the first position fine-tuning device and / or the second position fine-tuning device can align the radiation source with the detector, thereby facilitating the alignment of different types of radiation sources and detectors.

[0015] As described above, the CT device of this utility model has the following beneficial effects:

[0016] The CT equipment provided in this application can change the magnification ratio of the CT equipment by adjusting the distance between the X-ray source and the object being measured and / or the distance between the detector and the object being measured, thereby meeting the imaging needs of objects of various sizes and greatly improving the versatility of the CT equipment. In addition, this application can adjust the alignment between the X-ray source and the detector through a first position fine-tuning device and / or a second position fine-tuning device, so as to adapt to different types of X-ray sources and detectors and thus meet the usage needs in different application scenarios. Attached Figure Description

[0017] Figure 1This is a three-dimensional view of the CT equipment involved in this application.

[0018] Figure 2 This is a front view of a CT scanner.

[0019] Figure 3 This is a schematic diagram of the installation of the power mechanism and the scanning frame.

[0020] Figure 4 This is a schematic diagram of the connection between the first moving mechanism and the radiation source in one embodiment.

[0021] Figure 5 This is a schematic diagram of the connection between the second moving mechanism and the detector in one embodiment.

[0022] Figure 6 This is a schematic diagram showing the connection between the first position fine-tuning device and the radiation source in one embodiment.

[0023] Figure 7 This is a schematic diagram of the connection between the first moving mechanism and the radiation source in another embodiment.

[0024] Figure 8 This is a schematic diagram showing the connection between the second moving mechanism and the detector in another embodiment.

[0025] Explanation of reference numerals in the attached figures

[0026] Scanning frame 1, frame 11, rotating component 12, first fixed plate 121a, second fixed plate 121b, connecting plate 122, auxiliary pressure block 123, radiation source 2, detector 3, first moving mechanism 4a, second moving mechanism 4b, first linear drive mechanism 41a, second linear drive mechanism 41b, rotary motor 411, lead screw 412, lead screw nut 413, hand crank 414, first moving plate 42a, second moving plate 42b, adjusting plate 43, slide groove 431, locking bolt 44, first position fine adjustment device 5, side plate 51, lateral clamping block 511, radiation source mounting plate 52, reinforcing back plate 53, reinforcing top plate 54, second position fine adjustment device 6, detector adapter plate 61, detector mounting plate 62, reinforcing elbow plate 63, power mechanism 7, drive pulley 71, belt 72, rotary drive component 73, tensioning wheel 74. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0028] Please see Figures 1 to 8It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0029] This application provides a CT device with adjustable magnification, which can be applied to various technical fields such as non-destructive testing and clinical diagnosis. For ease of description, in the following embodiments, the emission centerline direction of the X-ray source 2 is defined as the first direction.

[0030] Example 1

[0031] like Figure 1 As shown, the CT equipment involved in this embodiment includes a scanning gantry 1, an X-ray source 2, and a detector 3. The X-ray source 2 and the detector 3 are arranged opposite to each other along a first direction on the scanning gantry 1, and a scanning space for accommodating the object under test is formed between the X-ray source 2 and the detector 3. In this way, the X-rays emitted by the X-ray source 2 can penetrate the object under test in the scanning space and irradiate the detector 3 to construct an internal cross-sectional view of the object under test. The scanning gantry 1 is provided with a spacing adjustment device, which adjusts the distance between the X-ray source 2 and the detector 3, thereby adjusting the distance from the X-ray source 2 to the object under test and / or the distance from the detector 3 to the object under test, thereby changing the magnification ratio.

[0032] It should be noted that the magnification ratio is the ratio of the distance from the X-ray source 2 to the detector 3 (Source to DetectorDistance, i.e., SDD) to the distance from the X-ray source 2 to the object being measured (Source to ObjectDistance, i.e., SOD).

[0033] It is understood that the spacing adjustment device can be a synchronous adjustment device such as a bidirectional lead screw mechanism, which can make the X-ray source 2 and the detector 3 move closer or further away synchronously; or it can be a moving mechanism that adjusts the position of the X-ray source 2 or the detector 3 in the first direction separately, and there is no limitation on this. In order to expand the adjustment range of the magnification ratio, in this embodiment, the spacing adjustment device includes a first moving mechanism 4a and / or a second moving mechanism 4b; the first moving mechanism 4a is used to adjust the position of the X-ray source 2 in the first direction, and the second moving mechanism 4b is used to adjust the position of the detector 3 in the first direction.

[0034] Specifically, such as Figure 2 , Figure 4 and Figure 5 As shown, the first moving mechanism 4a includes a first linear drive mechanism 41a for driving the radiation source 2 closer to or away from the detector 3; the second moving mechanism 4b includes a second linear drive mechanism 41b for driving the detector 3 closer to or away from the radiation source 2.

[0035] It is understood that the first linear drive mechanism 41a and the second linear drive mechanism 41b can be any automatic drive mechanism capable of achieving linear motion in a specific direction, such as an electric push rod, a motor screw mechanism, a cylinder, or a hydraulic cylinder, and there is no limitation on this. In this embodiment, the first linear drive mechanism 41a and the second linear drive mechanism 41b are preferably motor screw mechanisms.

[0036] like Figure 4 and Figure 6 As shown, the first linear drive mechanism 41a and the second linear drive mechanism 41b both employ motor screw mechanisms including a screw 412 extending along a first direction, a screw nut 413 rotatably mounted on the screw 412, and a rotary motor 411 driving the screw 412 to rotate. The screw nut 413 of the first linear drive mechanism 41a is connected to the X-ray source 2, and the screw nut 413 of the second linear drive mechanism 41b is connected to the detector 3. Thus, when each rotary motor 411 drives the corresponding screw 412 to rotate, the distance between the X-ray source 2 and the detector 3 and / or the object being measured can be adjusted to achieve automatic adjustment of the magnification ratio.

[0037] Optionally, the rotary motor 411 is connected to the lead screw 412 via a synchronous belt drive assembly, and one end of the lead screw 412 is provided with a hand crank 414; in this way, the user can drive the lead screw 412 to rotate either through the rotary motor 411 or through the hand crank 414, thereby facilitating the user to switch between automatic and manual adjustment according to the actual situation and improving the flexibility of the amplification ratio adjustment.

[0038] Since the synchronous belt drive assembly is existing technology, it will not be described in detail. In order to avoid the synchronous belt slippage problem during operation, the synchronous belt tensioning operation can be achieved by adjusting the position of the rotary motor 411 or by adding a tensioning pulley for tensioning the synchronous belt.

[0039] Optionally, the scanning frame 1 is provided with a first position detector and a second position detector; wherein, the first position detector is used to identify the position of the X-ray source 2 in the first direction, and the second position detector is used to identify the position of the detector 3 in the first direction; in this way, the positions of the X-ray source 2 and the detector 3 in the first direction can be identified by the first position detector and the second position detector, so as to achieve accurate adjustment of the magnification ratio; in this embodiment, the first position detector and the second position detector are various position detection sensors such as laser rangefinders or photoelectric sensors.

[0040] Furthermore, such as Figure 2 As shown, the scanning frame 1 includes a frame 11 and a rotating component 12; wherein, the first linear drive mechanism 41a, the second linear drive mechanism 41b, the X-ray source 2, and the detector 3 are all mounted on the rotating component 12; the rotating component 12 is rotatably mounted on the frame 1, and the emission center line of the X-ray source 2 intersects perpendicularly with the rotation center line of the rotating component 12; thus, by simply rotating the rotating component 12, the object under test can be rotated and scanned to obtain a three-dimensional internal image of the object under test, thereby improving the accuracy of the detection of the object under test.

[0041] In this embodiment, the rotating component 12 includes an inner ring of a bearing, and the outer ring of the bearing is fixed to the frame 11.

[0042] To achieve automatic rotation of the rotating component 12, such as Figure 2 As shown, the frame 11 is equipped with a power mechanism 7 that drives the rotating component 12 to rotate; the specific structure of the power mechanism 7 is not limited, as long as it can drive the rotating component 12 to rotate. In this embodiment, as... Figure 3 As shown, the power mechanism 7 includes a drive pulley 71, a belt 72, and a rotary drive component 73. The belt 72 is sleeved on the inner ring of the drive pulley 71 and the bearing. The rotary drive component 73 is used to drive the drive pulley 71 to rotate.

[0043] It should be noted that the rotary drive component 73 is a motor or a combination of a motor and a reducer; this is not limited. In order to achieve smooth transmission under heavy load, in this embodiment, the rotary drive component 73 is a combination of a motor and a reducer.

[0044] Optionally, such as Figure 3 As shown, the power mechanism 7 also includes a tensioning pulley 74 for tensioning the belt 72.

[0045] In addition, the CT equipment also includes a cable carrier for cable routing; one end of the cable carrier is connected to the frame 11, and the other end of the cable carrier is connected to the rotating component 12.

[0046] To ensure the stability of the position adjustment of X-ray source 2 and detector 3, such as Figure 2 As shown, the rotating component 12 is equipped with a first fixed plate 121a and a second fixed plate 121b spaced apart along a first direction; wherein, the radiation source 2 and the first moving mechanism 41a are both mounted on the first fixed plate 121a, and the lead screw nut 413 of the first moving mechanism 41a is connected to the radiation source 2 to drive the radiation source 2 to reciprocate along the first direction; the detector 3 and the second moving mechanism 41b are both mounted on the second fixed plate 121b, and the lead screw nut 413 of the second moving mechanism 41b is connected to the detector 3 to drive the detector 3 to reciprocate along the first direction.

[0047] Optionally, the rotating component 12 is provided with two connecting plates 122 for connecting the first fixing plate 121a and the second fixing plate 121b, and the first fixing plate 121a, the second fixing plate 121b and the two connecting plates 122 together enclose a scanning space. The connection plates 122 can effectively improve the connection stability between each fixing plate and the rotating component 12.

[0048] Because the dimensions of different models of radiation source 2 and detector 3 vary, in order to meet the installation requirements of different models of radiation source 2 and detector 3, such as Figure 2 As shown, a first movable plate 42a is provided on the first fixed plate 121a, which slides back and forth along a first direction; the first movable plate 42a is connected to the lead screw nut 413 of the first moving mechanism 41a, and the X-ray source 2 is mounted on the first movable plate 42a through a first position fine-tuning device 5; a second movable plate 42b is provided on the second fixed plate 121b, which slides back and forth along the first direction, and the second movable plate 42b is connected to the lead screw nut 413 of the second moving mechanism 41b, and the detector 3 is mounted on the second movable plate 42a through a second position fine-tuning device 5. The first position fine-tuning device 5 is used to adjust the position of the X-ray source 2 in a plane perpendicular to the first direction (i.e., the position adjustment along the axial and / or tangential direction of the rotating component 2), and the second position fine-tuning device 6 is used to adjust the position of the detector 3 in a plane perpendicular to the first direction (i.e., the position adjustment along the axial and / or tangential direction of the rotating component 2). By adjusting the first position fine-tuning device 5 and / or the second position fine-tuning device 6, the X-ray source 2 and the detector 3 can be aligned, thereby satisfying the alignment and installation of different types of X-ray sources 2 and detectors 3.

[0049] Specifically, such as Figure 4 and Figure 5As shown, the first position fine-tuning device 5 includes two side plates 51, a radiation source mounting plate 52, and a reinforcing top plate 54. Both side plates 51 are fixedly connected to the second movable plate 42b, and the two side plates 51, the radiation source mounting plate 52, and the reinforcing top plate 54 together form a mounting frame with an opening. The opening of the mounting frame is located on the side facing the detector 3. The radiation source 2 extends into the mounting frame through the opening and is connected to the radiation source mounting plate 52 by a first bolt. The radiation source mounting plate 52 has a first guide groove, the extension direction of which is perpendicular to the side plates 51. The bolt shank of the first bolt passes through the first guide groove on the radiation source mounting plate 52 and is threadedly connected to the radiation source 2. Thus, by simply adjusting the position of the first bolt within the first guide groove, the position of the radiation source 2 in the tangential direction can be adjusted.

[0050] It should be noted that in order to enable flexible installation of the X-ray source 2 at 0° and 90° positions, and to ensure that the X-ray source 2 can completely cover the scanning section of the object under test, there are 4 first bolts, and the 4 first bolts are symmetrically distributed about the emission center line of the X-ray source 2.

[0051] Furthermore, to ensure the installation stability of X-ray source 2 during the rotational scanning process, such as... Figure 4 and Figure 5 As shown, two lateral clamping blocks 511 for clamping the X-ray source 2 are arranged opposite each other at the opening of the mounting frame. The two lateral clamping blocks 511 are mounted opposite each other on the two side plates 51 by second bolts, and each of the two lateral clamping blocks 511 is provided with a second guide groove extending towards the other lateral clamping block 511 (i.e., extending along the tangential direction of the rotating component 2). The bolt shank of the second bolt passes through the second guide groove of the lateral clamping block 511 and is threadedly connected to the corresponding side plate 51. In this way, by simply loosening the second bolt and adjusting the relative position of the two lateral clamping blocks 511 and the mounting frame, the X-ray source 2 can be clamped and fixed at different tangential positions.

[0052] Of course, in other embodiments, the two lateral clamps 511 can also be replaced by two fine-tuning bolts, which are threaded onto the corresponding side plates 51.

[0053] Furthermore, since the axial lengths of different types of X-ray sources 2 vary, in order to ensure that the relative position of the focal point of each X-ray source 2 with the side plate 51 remains unchanged when it is installed in place, such as... Figure 4 As shown, the position of the X-ray source mounting plate 52 in the first direction between the two side plates 51 is adjustable.

[0054] It is understood that the position adjustment structure of the X-ray source mounting plate 52 in the first direction can be determined according to the actual situation and is not limited thereto. In this embodiment, slots are provided opposite to each other on the two side plates 51, and the two opposite slots cooperate to form a socket for the X-ray source mounting plate 52 to be inserted; by simply inserting the X-ray source mounting plate 52 into different sockets, the installation of different X-ray sources 2 can be completed without changing the magnification ratio.

[0055] Optionally, such as Figure 4 As shown, the side plates 51 furthest from the detector 3 are connected by a reinforcing back plate 53 to ensure the installation stability of the side plates 51 and the radiation source mounting plate 52, thereby ensuring the installation stability of the radiation source 2.

[0056] like Figure 6 and Figure 8 As shown, the second position fine-tuning device includes a detector mounting plate 62; the detector mounting plate 62 is perpendicularly connected to the second moving plate 42b, and the detector 3 is mounted on the detector mounting plate 62 by a third bolt; wherein, the detector mounting plate 62 is provided with a third guide groove. The extension direction of the third guide groove is perpendicular to the second moving plate 42b (i.e., extends along the axial direction of the rotating component 12); the bolt shank of the third bolt passes through the third guide groove and is threadedly connected to the detector 3. Thus, by simply changing the position of the third bolt in the third guide groove, the axial position adjustment and locking of the detector 3 can be completed.

[0057] Optionally, such as Figure 6 As shown, the second position fine-tuning device includes a detector adapter plate 61 that is perpendicularly connected to the detector mounting plate 62; the detector adapter plate 61 is mounted on the second moving plate 42b by a fourth bolt; wherein, the detector adapter plate 61 is provided with a fourth guide groove, the extension direction of the fourth guide groove is perpendicular to the first direction, and the bolt shank of the fourth bolt passes through the fourth guide groove and is threadedly connected to the second moving plate 42b; thus, the position adjustment of the detector 3 in the tangential direction can be completed simply by adjusting the position of the fourth bolt in the fourth guide groove.

[0058] like Figure 6 As shown, in order to ensure the connection stability between the detector mounting plate 62 and the detector adapter plate 61, the two are connected by a reinforcing elbow plate 63.

[0059] Since the tangential position of the X-ray source 2 and the axial and tangential positions of the detector 3 are adjustable, it is beneficial to meet the alignment and installation requirements of different types of X-ray sources 2.

[0060] Example 2

[0061] The only difference between this embodiment and Embodiment 1 is the specific structure of the first moving mechanism 4a and the second moving mechanism 4b.

[0062] It is understood that both the first moving mechanism 4a and the second moving mechanism 4b in this embodiment are manually adjustable structures.

[0063] Specifically, such as Figure 7 and Figure 8 As shown, both the first moving mechanism 4a and the second moving mechanism 4b include an adjusting plate 43 and a locking bolt 44. The adjusting plate 43 is provided with a sliding groove 431 extending in the first direction. The bolt rod of the locking bolt 44 passes through the sliding groove 431 and is threadedly connected to the corresponding fixed plate on the rotating component 2, thereby adjusting and locking the position of the adjusting plate 43 in the first direction, and realizing the manual adjustment of the magnification ratio of the CT equipment.

[0064] Optionally, to ensure the stability of the adjusting plate 43 after it is adjusted to the correct position, an auxiliary pressure block 123 can be added to the corresponding fixed plate. The auxiliary pressure block 123 is provided with an adjusting bolt that is threadedly connected to the corresponding fixed plate. Under normal circumstances, the auxiliary pressure block 123 is located above the adjusting plate 43. When it is necessary to change the position of the adjusting plate 43, the adjusting bolt must be loosened first. After the adjusting plate 43 is adjusted to the correct position, the adjusting bolt can be turned to move the bolt head of the adjusting bolt and the auxiliary pressure block 123 together toward the corresponding fixed plate until the bolt head of the adjusting bolt presses the adjusted plate 43 onto the corresponding fixed plate through the auxiliary pressure block 123.

[0065] In addition, to reduce costs, the first and second position detectors can also use scale lines.

[0066] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0067] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A CT device with adjustable magnification, comprising a gantry (1), wherein a radiation source (2) and a detector (3) are disposed opposite to each other on the gantry (1); characterized in that, The scanning frame (1) is equipped with a spacing adjustment device, which is used to adjust the spacing between the X-ray source (2) and the detector (3).

2. The CT equipment according to claim 1, characterized in that, The spacing adjustment device includes a first moving mechanism (4a) and / or a second moving mechanism (4b); the first moving mechanism (4a) is used to adjust the position of the radiation source (2) in a first direction, and the second moving mechanism (4b) is used to adjust the position of the detector (3) in the first direction; the first direction is the emission center line direction of the radiation source (2).

3. The CT equipment according to claim 2, characterized in that, The first moving mechanism (4a) includes a first linear drive mechanism (41a) for driving the radiation source (2) to move closer to or away from the detector (3); the second moving mechanism (4b) includes a second linear drive mechanism (41b) for driving the detector (3) to move closer to or away from the radiation source (2).

4. The CT device according to claim 2, characterized in that, Each moving mechanism includes an adjusting plate (43) and a locking bolt (44). The adjusting plate (43) is provided with a sliding groove (431) extending in a first direction. The bolt rod of the locking bolt (44) passes through the sliding groove (431) and is threadedly connected to the scanning frame (1).

5. The CT device according to claim 2, characterized in that, The scanning frame (1) is provided with a first position detector and / or a second position detector; the first position detector is used to identify the position of the radiation source (2) in a first direction, and the second position detector is used to identify the position of the detector (3) in a first direction.

6. The CT device according to any one of claims 1 to 5, characterized in that, The scanning frame (1) includes a frame (11) and a rotating component (12), which is rotatably mounted on the frame (11). The X-ray source (2), detector (3), first moving mechanism (4a) and second moving mechanism (4b) are all mounted on the rotating component (12), and the emission center line of the X-ray source (2) intersects perpendicularly with the rotation center line of the rotating component (12).

7. The CT device according to claim 6, characterized in that, The rotating component (12) includes an inner ring of a bearing, the outer ring of which is fixed to the frame (11).

8. The CT device according to claim 6, characterized in that, The frame (11) is provided with a power mechanism (7) that drives the rotating component (12) to rotate.

9. The CT device according to claim 7, characterized in that, The CT equipment includes a cable carrier for cable routing; one end of the cable carrier is connected to the frame (11), and the other end of the cable carrier is connected to a rotating component (12).

10. The CT device according to claim 2, characterized in that, The radiation source (2) is mounted on the first moving mechanism (4a) via the first position fine-tuning device (5), and the detector (3) is mounted on the second moving mechanism (4b) via the second position fine-tuning device (6); adjusting the first position fine-tuning device (5) and / or the second position fine-tuning device (6) can make the radiation source (2) and the detector (3) aligned.

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