Double-ring O-shaped arm imaging device and CT imaging system

Abstract

The invention discloses a double-ring O-shaped arm imaging device and a CT imaging system. The device comprises a supporting frame assembly, an outer ring assembly and an inner ring assembly. Wherein the supporting frame assembly is used for being installed at a preset position, so that an installation foundation is provided for the outer ring assembly, and the supporting effect is achieved. The outer ring assembly and the inner ring assembly are both in a C shape, the outer ring assembly is installed on the supporting frame assembly and can rotate relative to the supporting frame assembly, and the inner ring assembly is installed on the inner side of the outer ring assembly and can rotate relative to the outer ring assembly. Therefore, through relative rotation of the inner ring assembly and the outer ring assembly, an O-shaped arm can be formed; moreover, through relative rotation of the outer ring assembly and the supporting frame assembly, the O-shaped arm can rotate by 360 degrees, and 360-DEG C T scanning is achieved. Therefore, three-dimensional imaging can be carried out in the operation, the difference between the preoperative CT image and the postoperative CT image caused by the change of the body position of the patient is avoided, and the accuracy of image evaluation is improved.

Description

Technical Field

[0001] The present invention relates to the field of CT scanning equipment, and in particular to a double-ring O-shaped arm imaging device and a CT imaging system. Background Art

[0002] Minimally invasive surgery is one of the main directions of surgical development in the 21st century. It is widely used worldwide for its advantages of less trauma, faster recovery, and fewer complications. However, the technical characteristics of minimally invasive surgery determine that it cannot be performed in a completely open environment, which increases the risk of surgery. Therefore, the success of the operation depends largely on the surgeon's accurate evaluation of the patient's preoperative CT images. In addition, it is a routine clinical practice to perform a CT scan after surgery to confirm the surgical effect and determine whether a second operation is needed. Among them, changes in the patient's position may lead to differences from the preoperative CT image evaluation, affecting the surgical effect, thereby increasing the risk of secondary surgery.

[0003] Currently, most of the imaging devices for minimally invasive surgery on the market are C-arm X-ray scanning devices, which have limited scanning angles, low mechanical precision, and difficulty in obtaining clear three-dimensional images. These technical limitations not only affect the accuracy and effect of surgery, but also limit the further development and application of minimally invasive surgery. Summary of the invention

[0004] The present invention provides a double-ring O-arm imaging device and a CT imaging system, which realize 360-degree rapid scanning and precise rotation by means of the O-arm, thereby generating high-quality three-dimensional images.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] The first aspect of the technical solution of the present invention provides a double-ring O-arm imaging device, comprising:

[0007] A support frame assembly, used to be installed at a preset position to provide support;

[0008] An outer ring assembly, the outer ring assembly is C-shaped and is rotatably mounted on the support frame assembly around its rotation axis; wherein the support frame assembly is provided with a first driving portion, the first driving portion is connected to the outer ring assembly to provide a driving force for the rotation of the outer ring assembly;

[0009] An inner ring assembly, the inner ring assembly is C-shaped and rotatably mounted on the inner side of the outer ring assembly around its rotation axis; wherein the inner ring assembly is provided with a second driving portion, the second driving portion is connected to the outer ring assembly to provide a driving force for the rotation of the inner ring assembly; and the rotation axis of the inner ring assembly coincides with the rotation axis of the outer ring assembly;

[0010] Among them, the second driving unit can drive the inner ring assembly and the outer ring assembly to rotate relative to each other, so as to cause the openings of the outer ring assembly and the inner ring assembly to overlap or drive the outer ring assembly and the inner ring assembly to jointly form an O-shaped arm; the first driving unit can drive the outer ring assembly and the inner ring assembly to rotate synchronously, so that the imaging assembly installed on the inner ring assembly can perform 360°T scanning.

[0011] A second aspect of the technical solution of the present invention provides a CT imaging system, comprising the above-mentioned double-ring O-arm imaging device.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) The inner ring assembly and the outer ring assembly are rotated relative to each other to form an O-shaped arm; and the outer ring assembly and the support frame assembly are rotated relative to each other to make the O-shaped arm rotate 360° to achieve 360°T scanning. Thus, three-dimensional imaging can be performed during surgery, avoiding the difference between preoperative CT images and postoperative CT images caused by changes in patient position, thereby improving the accuracy of image evaluation.

[0014] (2) The outer ring track and the inner ring track are coaxial with the centers of the outer ring pin wheel and the inner ring pin wheel and are both arranged on the outer ring body, so the mechanical rotation accuracy is high.

[0015] (3) The dual-ring O-arm imaging device can also control the outer ring component to rotate independently, thereby being able to take into account the traditional C-arm function.

[0016] (4) Simple mechanical structure, high rotation accuracy, easy maintenance and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a double-ring O-arm imaging device provided by an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the double-ring O-arm imaging device in a pre-rotation state;

[0019] Figure 3 for Figure 1 A schematic diagram of the structure of the double-ring O-arm imaging device in the rotation completion state;

[0020] Figure 4 is a structural schematic diagram of a support frame assembly;

[0021] Figure 5 It is a structural schematic diagram of the outer ring component;

[0022] Figure 6 It is a schematic diagram of the structure of the inner ring component.

[0023] In the accompanying drawings, each reference numeral represents:

[0024] 1. Support frame assembly; 11. Support frame seat; 12. Outer ring roller; 13. Outer ring gear; 14. First driving part; 15. First clutch; 111. Flange; 112. Avoidance groove; 121. Connecting plate; 122. Radial roller; 123. Lateral roller;

[0025] 2. Outer ring assembly; 21. Outer ring body; 22. Outer ring pin wheel; 23. Inner ring pin wheel; 211. Opening of the outer ring body; 212. Annular raised portion; 213. Outer ring track; 214. Inner ring track;

[0026] 3. Inner ring assembly; 31. Inner ring body; 32. Imaging assembly; 33. Inner ring roller; 34. Second driving unit; 35. Second clutch; 311. Opening of the inner ring body; 321. Ball tube; 322. Detector. DETAILED DESCRIPTION

[0027] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0028] The embodiment of the present invention provides a dual-ring O-arm imaging device, which is mainly used for intraoperative imaging in orthopedics and craniotomy. The device forms an O-arm through the relative rotation of two C-arms, and controls the O-arm to rotate 360°, thereby performing three-dimensional imaging during surgery using a dual-ring rotation method, realizing 360° rotation shooting of the tube and detector, and obtaining high-quality images.

[0029] Specifically, Figure 1 As shown, a dual-ring O-arm imaging device provided by an embodiment of the present invention includes a support frame assembly 1, an outer ring assembly 2 and an inner ring assembly 3. Among them, the support frame assembly 1 is used to be installed in a preset position, so as to provide an installation base for the outer ring assembly 2 and play a supporting role. The outer ring assembly 2 and the inner ring assembly 3 are both C-shaped, the outer ring assembly 2 is installed on the support frame assembly 1, and can rotate relative to the support frame assembly 1, and the inner ring assembly 3 is installed on the inner side of the outer ring assembly 2, and can rotate relative to the outer ring assembly 2. Thus, through the relative rotation of the inner ring assembly 3 and the outer ring assembly 2, an O-arm (such as Figure 2-3and, through the relative rotation of the outer ring assembly 2 and the support frame assembly 1, the O-arm can rotate 360° to achieve 360°T scanning.

[0030] Combine the following Figure 4-6 , the various components of the device are described in detail:

[0031] (1) Support frame assembly

[0032] like Figure 4 As shown, in this embodiment, the support frame assembly 1 includes a support frame seat 11, an outer ring roller 12, an outer ring gear 13, a first driving part 14 and a first clutch 15.

[0033] Specifically, the support frame 11 is in an arc shape to match the C-shaped outer ring assembly 2. In addition, the outer surface of the support frame 11 is provided with a flange 111 (such as Figure 1 As shown), for connecting with other components, so that the support frame seat 11 is installed at a preset position. In one embodiment, the support frame seat 11 is installed on a mobile platform or a cart by means of the flange 111, so that the support frame assembly 1 can be moved at will, thereby improving the convenience of use and transportation. In another embodiment, the support frame seat 11 is installed on a bracket track on a ceiling or wall in a room by means of the flange 111. In yet another embodiment, the support frame seat 11 is installed on a fixed column or a liftable column by means of the flange 111, so that load-bearing scanning can be performed. It can be understood that the preset position can be adaptively selected as needed to meet different CT scanning requirements, and no specific limitation is made here.

[0034] The outer ring roller 12 is installed on both sides of the support frame 1 to roll with the outer ring assembly 2, so as to guide the outer ring assembly 2 in rotation. Specifically, the outer ring roller 12 includes a connecting plate 121, a radial roller 122 and a lateral roller 123. The connecting plate 121 is a rectangular plate structure (not limited to a specific shape and size), and two connecting plates 121 are symmetrically arranged on both sides of the support frame 11. The radial roller 122 is arranged on the inner side of the connecting plate 121 to roll with the outer ring assembly 2, so as to guide the outer ring assembly 2 in rotation. The lateral roller 123 is arranged on the inner side of the connecting plate 121 and abuts against the side wall of the outer ring assembly 2 to limit the outer ring assembly 2 in the axial direction, so as to ensure the stability of rotation. Preferably, in this embodiment, two groups of outer ring rollers 12 are arranged to improve the stability of installation and guidance.

[0035] The outer ring gear 13 is installed in the support frame 11, and an avoidance groove 112 is opened on the inner surface of the support frame 11 at a position corresponding to the outer ring gear, so that the outer ring gear 13 can mesh with the outer ring pin wheel 22 on the outer ring assembly 2 (see below for details).

[0036] The first driving part 14 is installed on one side of the support frame and is connected to the outer ring gear 13 for driving the outer ring gear 13 to rotate, thereby driving the outer ring assembly 2 to rotate around its rotation axis through the meshing transmission between the outer ring gear 13 and the outer ring pin wheel 22. In this embodiment, the first driving part 14 uses a belt gear transmission mechanism, but is not limited to this structural form, and can also be replaced by a servo motor, a rotary cylinder or other driving parts in other embodiments.

[0037] The first clutch 15 is connected between the first drive unit 14 and the outer ring gear 13, and can be switched between a connected state and a disconnected state to control the transmission of power. It can be understood that when the first clutch 15 is in a connected state, the first drive unit 14 can drive the outer ring gear 13 to rotate; when the first clutch 15 is in a disconnected state, the first drive unit 14 cannot drive the outer ring gear 13 to rotate. Therefore, by controlling the first clutch 15, the rotation position of the outer ring assembly 2 can be controlled to meet the CT scanning requirements at different angles. In addition, it can be understood that the first clutch 15 can adopt a manual clutch or an electromagnetic clutch, etc., and can be adaptively selected according to needs.

[0038] (2) Outer ring assembly

[0039] like Figure 5 As shown, in this embodiment, the outer ring assembly 2 includes an outer ring body 21, an outer ring pin wheel 22 and an inner ring pin wheel 23.

[0040] Specifically, the outer ring body 21 is a C-shaped arm with an opening. Preferably, the opening 211 of the outer ring body is 30 to 180 degrees. In this embodiment, an annular protrusion 212 is provided on the outer wall of the outer ring body 21, so that the outer side of the annular protrusion 212 forms an outer ring track 213, and the inner side forms an inner ring track 214. In addition, the outer ring track 213 is used for rolling cooperation with the radial roller 122 of the outer ring roller, so as to guide the outer ring body 21 in rotation. The inner ring track 214 is used for rolling cooperation with the inner ring assembly 3, so as to guide the inner ring assembly 3 in rotation.

[0041] In addition, it should be understood that in this embodiment, the outer ring track 213 and the inner ring track 214 are both arranged on the outer side of the outer ring body 21, which is only one implementation method. In other embodiments, the outer ring track 213 and the inner ring track 214 can also be designed on the inner side; or one of the outer ring track 213 and the inner ring track 214 can be designed on the inner side and the other on the outer side.

[0042] The outer ring pin wheel 22 is installed outside the outer ring body 21 and meshes with the outer ring gear 13. Therefore, when the first driving unit 14 is started, the outer ring body 21 can be driven to rotate around its rotation axis through the meshing transmission of the outer ring gear 13 and the outer ring pin wheel 22.

[0043] The inner ring pin wheel 23 is installed on the inner side of the outer ring body 21 and meshes with the inner ring gear on the inner ring assembly 3, thereby driving the inner ring assembly 3 to rotate (see below for details).

[0044] It is understandable that, in this embodiment, installing the outer ring pin wheel 22 on the outer side of the outer ring body 21 and installing the inner ring pin wheel 23 on the inner side of the outer ring body 21 is only one implementation. In other embodiments, the outer ring pin wheel and the inner ring pin wheel can also be arranged on the outer side of the outer ring body 21 at the same time.

[0045] (3) Inner ring assembly

[0046] like Figure 6 As shown, in this embodiment, the inner ring assembly 3 includes an inner ring body 31 , an imaging assembly 32 , an inner ring roller 33 , a second driving part 34 and a second clutch 35 .

[0047] Specifically, the inner ring body 31 is a C-shaped arm with an opening, and the opening 311 of the inner ring body is 30-180°. Preferably, the opening angle of the outer ring body 21 is greater than the opening angle of the inner ring body 31. In another embodiment, the opening angle of the outer ring body 21 can also be equal to the opening angle of the inner ring body 31. The outer side of the inner ring body 31 is provided with an inner ring roller 33, and the structure of the inner ring roller 33 is the same as that of the outer ring roller 12, which will not be described in detail here. Therefore, the inner ring body 31 is guided to rotate by the rolling cooperation between the inner ring roller 33 and the inner ring track 214.

[0048] The imaging assembly 32 is arranged on the outside of the inner ring body for CT scanning. Specifically, the imaging assembly 32 includes a tube 321 and a detector 322 (a flat device in this embodiment). The tube 321 is installed on the outside of the inner ring body 31 for emitting X-rays; accordingly, the detector 322 is installed on the outside of the inner ring body 31 and corresponds to the tube 321 to receive X-rays and form a detection image. In addition, preferably, the detector 322 is installed on the outside of the inner ring body 31 through a third driving member, and the tube 321 is installed on the outside of the inner ring body 31 through a fourth driving member. In addition, both the third driving member and the fourth driving member can move up and down to adjust the field of view by changing the distance between the rotation center of the tube 321 and the detector 322.

[0049] The second driving part 34 is installed on the outer side of the inner ring body 31, and an inner ring gear (not shown in the figure) is installed on the power output end of the second driving part 34, and the inner ring gear is meshed with the inner ring pin wheel 23. Therefore, the inner ring gear can be driven to rotate by the second driving part 34, while the inner ring pin wheel 23 is fixed. Therefore, the inner ring body 31 and the outer ring body 21 can be driven to rotate relative to each other through the mutual meshing of the inner ring gear and the inner ring pin wheel 23, so that the openings of the inner ring body 31 and the outer ring body 21 overlap (such as Figure 1 as shown) or together to form an O-shaped arm (as shown Figure 3 shown).

[0050] The second clutch 35 is connected between the second drive unit 34 and the inner ring gear 33, and can be switched between a connected state and a disconnected state to control the transmission of power. It can be understood that when the second clutch 35 is in a connected state, the second drive unit 34 can drive the inner ring gear 33 to rotate; when the second clutch 35 is in a disconnected state, the second drive unit 34 cannot drive the inner ring gear 33 to rotate. Therefore, by controlling the second clutch 35, the rotation position of the inner ring assembly 3 can be controlled to meet the CT scanning requirements at different angles. In addition, it can be understood that the second clutch 35 can be a manual clutch or an electromagnetic clutch, etc., and can be adaptively selected according to needs.

[0051] Combine the following Figure 1-3 , the working process of the double-ring O-arm imaging device according to the embodiment of the present invention is described in detail:

[0052] like Figure 1 , which is the initial state of the double-ring O-arm imaging device. At this time, the openings of the inner ring body 31 and the outer ring body 21 overlap, so that the patient can enter the interior of the O-arm through the opening.

[0053] When the patient enters the O-shaped arm, the first driving unit 14 drives the outer ring body 21 to rotate, and the second driving unit 34 drives the inner ring body 31 and the outer ring body 21 to rotate relative to each other to a pre-rotation state (i.e. Figure 2 During this process, the inner ring body 31 and the outer ring body 21 rotate counterclockwise synchronously at the same speed.

[0054] After the pre-rotation is completed, the outer ring body 21 is driven to rotate clockwise by the first driving part 14, and the inner ring body 31 is driven to rotate clockwise by the second driving part 34, and the rotation speed of the inner ring body 31 is greater than the rotation speed of the outer ring body 21, so that after a period of rotation, the outer ring body 21 and the inner ring body 31 can rotate to form an O-shaped arm (i.e. Figure 3 It can be understood that from the pre-rotation state to the formation of the O-shaped arm (i.e. Figure 3The process of performing the above steps is to detect whether there is a risk of collision.

[0055] After the O-shaped arm is formed (i.e., there is no risk of collision), the outer ring body 21 is driven to rotate counterclockwise by the first driving part 14, and the inner ring body 31 is driven to rotate counterclockwise by the second driving part 34, and the rotation speed of the inner ring body 31 is greater than the rotation speed of the outer ring body 21, so that after a period of rotation, it rotates to the pre-rotation state (i.e., Figure 2 In the process from the above-mentioned O-arm state to the pre-rotation state, a 360°T scan is performed by the imaging assembly 32 installed on the inner ring body 31 to obtain a high-quality three-dimensional CT image.

[0056] When the imaging assembly 32 completes the 360°T scan, the outer ring body 21 and the inner ring body 31 return to the initial state to wait for the next CT scan.

[0057] In addition, based on the above embodiment, the embodiment of the present invention further provides a CT imaging system, which includes the above double-ring O-arm imaging device. Preferably, the system may also include functional components such as a controller, an image processing unit and a display, so as to realize automatic control of CT scanning through the controller; and perform image processing on the detection image through the image processing unit to reconstruct a clear CT scan image; and then display the CT scan image through the display.

[0058] In summary, the dual-ring O-arm imaging device and CT imaging system provided by the embodiments of the present invention have the following beneficial effects:

[0059] (1) The inner ring assembly 3 and the outer ring assembly 2 can rotate relative to each other to form an O-shaped arm; and the outer ring assembly 2 and the support frame assembly 1 can rotate the O-shaped arm 360° to achieve 360°T scanning. Thus, three-dimensional imaging can be performed during surgery, avoiding the difference between preoperative CT images and postoperative CT images caused by changes in patient position, thereby improving the accuracy of image evaluation.

[0060] (2) The outer ring track 213 and the inner ring track 214 are coaxial with the centers of the outer ring pin wheel 22 and the inner ring pin wheel 23 and are both arranged on the outer ring body 21, so the mechanical rotation accuracy is relatively high.

[0061] (3) The dual-ring O-arm imaging device can also control the outer ring component 2 to rotate independently, thereby being able to take into account the traditional C-arm function.

[0062] (4) Simple mechanical structure, high rotation accuracy, easy maintenance and high reliability.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0065] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A double-ring O-arm imaging device, characterized in that: include: A support frame assembly, used to be installed at a preset position to provide support; An outer ring assembly, the outer ring assembly is C-shaped and is rotatably mounted on the support frame assembly around its rotation axis; wherein the support frame assembly is provided with a first driving portion, the first driving portion is connected to the outer ring assembly to provide a driving force for the rotation of the outer ring assembly; An inner ring assembly, the inner ring assembly is C-shaped and rotatably mounted on the inner side of the outer ring assembly around its rotation axis; wherein the inner ring assembly is provided with a second driving portion, the second driving portion is connected to the outer ring assembly to provide a driving force for the rotation of the inner ring assembly; and the rotation axis of the inner ring assembly coincides with the rotation axis of the outer ring assembly; Among them, the second driving unit can drive the inner ring assembly and the outer ring assembly to rotate relative to each other, so as to cause the openings of the outer ring assembly and the inner ring assembly to overlap or drive the outer ring assembly and the inner ring assembly to jointly form an O-shaped arm; the first driving unit can drive the outer ring assembly and the inner ring assembly to rotate synchronously, so that the imaging assembly installed on the inner ring assembly can perform 360°T scanning.

2. The double-ring O-arm imaging device according to claim 1, characterized in that: The support frame assembly comprises: A support bracket, used for installation at a preset position to provide support; Outer ring rollers are mounted on both sides of the support frame to cooperate with the outer ring assembly in rolling manner, thereby guiding the outer ring assembly in rotation; The outer ring gear is installed in the support frame, and a avoidance groove is provided on the inner surface of the support frame at a position corresponding to the outer ring gear, so that the outer ring gear can mesh with the outer ring pin wheel on the outer ring assembly; The first driving part is installed on one side of the support frame and is connected to the outer ring gear for driving the outer ring gear to rotate, thereby driving the outer ring assembly to rotate around its rotation axis.

3. The double-ring O-arm imaging device according to claim 2, characterized in that: The outer ring assembly comprises: An outer ring body, wherein the outer ring body is a C-shaped arm with an opening; wherein an outer ring track and an inner ring track are formed on the outer side of the outer ring body, the outer ring track is in rolling cooperation with the outer ring roller, and the inner ring track is in rolling cooperation with the inner ring assembly; An outer ring pin wheel is installed on the outer side of the outer ring body and meshes with the outer ring gear; The inner ring pin wheel is installed on the inner side of the outer ring body and meshes with the inner ring gear on the inner ring assembly.

4. The double-ring O-arm imaging device according to claim 3, characterized in that: The inner ring assembly comprises: An inner ring body, the inner ring body is a C-shaped arm with an opening, and the inner ring body is rotatably arranged on the inner side of the outer ring body; An imaging assembly, disposed outside the inner ring body, for performing CT scanning; An inner ring roller is arranged on the outer side of the inner ring body and rollingly cooperates with the inner ring track to guide the inner ring body in rotation; A second driving part is installed on the outer side of the inner ring body, and an inner ring gear is installed on the power output end of the second driving part, and the inner ring gear is meshed with the inner ring pin wheel; Among them, the second driving part can drive the inner ring gear to rotate, so as to drive the inner ring body and the outer ring body to rotate relative to each other through the engagement of the inner ring pin wheel and the inner ring gear, thereby making the openings of the inner ring body and the outer ring body overlap or jointly enclosed to form an O-shaped arm.

5. The double-ring O-arm imaging device according to claim 3, characterized in that: The outer ring roller comprises: Connecting plates, symmetrically arranged on both sides of the support frame; A radial roller, arranged on the inner side of the connecting plate and rollingly matched with the outer ring track, so as to guide the outer ring body in rotation; The lateral roller is arranged on the inner side of the connecting plate and abuts against the side wall of the outer ring body to limit the axial position of the outer ring body.

6. The double-ring O-arm imaging device according to claim 4, characterized in that: The support frame assembly further includes a first clutch, which is connected between the first driving part and the outer ring gear and can be switched between a connected state and a disconnected state to control the transmission of power; The inner ring assembly further includes a second clutch, which is connected between the second driving portion and the inner ring gear and can be switched between a connected state and a disconnected state to control the transmission of power.

7. The double-ring O-arm imaging device according to claim 4, characterized in that: The imaging assembly comprises: A tube, mounted on the outer side of the inner ring body, for emitting X-rays; The detector is installed on the outer side of the inner ring body and corresponds to the tube to receive the X-ray and form a detection image.

8. The double-ring O-arm imaging device according to claim 7, characterized in that: The detector is installed on the outer side of the inner ring body through a third driving member, and the ball tube is installed on the outer side of the inner ring body through a fourth driving member; The third driving member and the fourth driving member can both move up and down to adjust the field of view by changing the distance between the rotation center of the tube and the detector.

9. The double-ring O-arm imaging device according to claim 4, characterized in that: The opening angle of the outer ring body is 30-180°, the opening angle of the inner ring body is 30-180°, and the opening angle of the outer ring body is not less than the opening angle of the inner ring body.

10. A CT imaging system, characterized in that: It comprises a double-ring O-arm imaging device as described in any one of claims 1-9.

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