Rack assembly and computed tomography scanner

Abstract

This application claims a rack assembly and a computed tomography scanner. The rack assembly includes a rotating rack and an imaging assembly mounted on the rotating rack. The imaging assembly includes a correspondingly disposed X-ray source and a detector. The detector is provided with a position adjustment mechanism for adjusting its axial position relative to the rotating rack. When the detector deviates from its position, the position adjustment mechanism is used to adjust the detector's axial position relative to the rotating rack. This allows the detector to be adjusted relative to the X-ray source in the axial direction of the rotating rack, ensuring focal alignment between the X-ray source and the detector in the imaging assembly. This reduces the requirements for the overall dimensional control precision of the rotating rack, thereby reducing costs.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a rack assembly and a computed tomography scanner. Background Technology

[0002] The imaging components of a computed tomography (CT) scanner include a radiation source and a detector. If the focal alignment between the radiation source and the detector deviates significantly beyond the adjustment range of the rotating gantry, it will affect the accuracy of the imaging component, leading to image quality issues. Currently, existing CT scanners typically adjust the mounting position of the radiation source on the rotating gantry to achieve focal alignment between the radiation source and the detector. However, the limited mounting space of the radiation source on the rotating gantry makes adjustment difficult; especially when the CT scanner is equipped with two imaging components, since the mounting positions of the radiation sources for both components are adjustable, the aforementioned method of adjusting the radiation source clearly presents significant challenges for the operator. Utility Model Content

[0003] In view of this, it is necessary to provide a rack assembly and a computed tomography scanner for solving the above-mentioned technical problems.

[0004] A rack assembly includes a rotating rack and an imaging assembly mounted on the rotating rack, the imaging assembly including a correspondingly disposed X-ray source and a detector;

[0005] The detector is provided with a position adjustment mechanism for adjusting the axial position of the detector relative to the rotating frame.

[0006] It is understandable that when the detector is misaligned, the axial position of the detector relative to the rotating frame is adjusted by a position adjustment mechanism corresponding to the detector. This allows the detector to be adjusted relative to the X-ray source in the axial direction of the rotating frame, ensuring that the focal points between the X-ray source and the detector in the imaging assembly are aligned. This reduces the requirements for the overall dimensional control accuracy of the rotating frame, thereby reducing costs.

[0007] In one embodiment, the position adjustment mechanism includes a fixed plate, a connecting plate, and an adjusting member. The fixed plate is detachably fixedly connected to the rotating frame, the connecting plate is detachably connected to the detector, and the adjusting member is rotatably mounted on the fixed plate.

[0008] Understandably, when the position adjustment mechanism adjusts the position of the detector relative to the radiation source in the axial direction of the rotating frame, the fixing plate can be first connected and fixed to the rotating frame, and the connecting plate can be connected and fixed to the detector. Then, by using the screw connection between the adjusting component and the connecting plate, the operator can simply turn the adjusting component outside the rotating frame. This not only provides a large operating space but also makes the operation convenient.

[0009] In one embodiment, a guiding fit structure is formed between the detector and the rotating frame;

[0010] The detector is capable of moving along the axial direction of the rotating frame under the guidance of the guiding and mating structure.

[0011] It is understandable that the guide structure is used to guide the detector to move in the axial direction of the rotating frame. This allows the detector to be adjusted in position only in the axial direction of the rotating frame, so as to meet the position adjustment mechanism's requirement for the detector to be adjusted in the axial direction of the rotating frame.

[0012] In one embodiment, the rack assembly further includes a locking member, the detector having a through hole, the locking member passing through the detector and connected to the rotating rack, for controlling the locking / unlocking of the detector on the rotating rack;

[0013] The wall of the through hole forms a preset gap between the locking member and the axial direction of the rotating frame.

[0014] It is understandable that by utilizing the preset gap between the locking component and the wall of the through hole in the axial direction of the rotating frame, the position adjustment of the detector on the rotating frame will not affect the fixation of the detector on the rotating frame.

[0015] In one embodiment, the connecting plate is threaded to the detector.

[0016] It is understandable that the connection between the connecting plate and the detector is made detachable by means of threads, which makes it easier to install and remove the connecting plate from the detector.

[0017] In one embodiment, the fixing plate is threaded to the rotating frame.

[0018] It is understandable that the fixed plate and the rotating frame are detachably connected by threads, which facilitates the installation and removal of the fixed plate on the rotating frame.

[0019] In one embodiment, the fixing plate has a slot, and the adjusting member can engage with the slot.

[0020] Understandably, by utilizing the snap-fit ​​between the adjusting component and the slot on the fixed plate, it is easy to assemble the adjusting component onto the fixed plate and prevent the adjusting component from shifting in position in the axial direction of the rotating frame when it rotates on the fixed plate.

[0021] In one embodiment, the adjusting member has a screw head disposed on the side of the fixing plate opposite to the connecting plate;

[0022] The screw head and the fixed plate are marked with scale marks.

[0023] Understandably, the scale marks between the screw head and the fixed plate can indicate the rotation angle of the adjusting component when it rotates on the fixed plate. This can improve the accuracy of the position adjustment of the detector in the axial direction of the rotating frame, thereby further facilitating the adjustment operation by the operator.

[0024] In one embodiment, the number of imaging components is configured to be multiple sets.

[0025] In addition, this application also provides a computed tomography scanner, including the rack assembly described above.

[0026] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0027] The rack assembly and computed tomography scanner claimed in this application allow for the following adjustment when the detector shifts position: first, a fixed plate is connected and fixed to the rotating frame, and a connecting plate is connected and fixed to the detector. Then, by using the screw connection between the adjusting component and the connecting plate, the operator can rotate the adjusting component outside the rotating frame to adjust the detector's position relative to the X-ray source in the axial direction of the rotating frame. This ensures that the focal points between the X-ray source and the detector in the imaging assembly are aligned. This not only provides a large operating space but also makes operation convenient. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the rack assembly provided in this application, wherein the number of imaging components is configured as two sets.

[0030] Figure 2This is a partial structural diagram of the rotating frame, detector, and position adjustment mechanism during assembly in this application.

[0031] Figure 3 This is a schematic diagram of the detector in this application when it is installed on a rotating frame.

[0032] Figure 4 This is a partial structural diagram of the detector in this application when it is installed on a rotating frame.

[0033] Figure 5 , Figure 6 and Figure 7 These are schematic diagrams illustrating the structure of different embodiments of the position adjustment mechanism in this application.

[0034] Figure 8 This is a schematic diagram of the structure of the adjusting component assembled on the fixed plate in this application.

[0035] Figure 9 This is a partial structural diagram of the detector in this application when it is assembled on a rotating frame.

[0036] Figure 10 for Figure 9 A partial structural diagram.

[0037] Reference numerals: 100, frame assembly; 10, rotating frame; 20, imaging assembly; 210, first imaging assembly; 220, second imaging assembly; 21, X-ray source; 22, detector; 221, second through hole; 222, through hole; 2221, hole wall; 223, threaded hole; 30, position adjustment mechanism; 301, scale mark; 3011, scale line; 3012, baseline; 31, fixing plate; 311, fixing plate body; 312, bent plate body; 313, slot; 32, connecting plate; 321, first through hole; 33, adjusting component; 331, screw head; 332, limit stop; 40, guide mating structure; 41, pin; 50, locking component; 101, preset gap. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] like Figure 1 , Figure 2 As shown, an embodiment of this application provides a gantry assembly 100, including a rotating gantry 10 and an imaging assembly 20 mounted on the rotating gantry 10. The imaging assembly 20 includes a correspondingly disposed X-ray source 21 and a detector 22. The detector 22 is provided with a position adjustment mechanism 30 for adjusting the axial position of the detector 22 relative to the rotating gantry 10. Here, the axial direction of the rotating gantry 10 specifically refers to the bed-entry direction in a computed tomography scanner using this gantry. It should be noted that when the fixing plate 31 and the connecting plate 32 are respectively connected to the corresponding rotating gantry 10 and detector 22, the fixing plate 31 and the connecting plate 32 are arranged on one side of the rotating gantry 10 in the axial direction.

[0042] As can be seen from the above, when the detector 22 is offset, the axial position of the detector 22 relative to the rotating frame 10 can be adjusted by the position adjustment mechanism 30 corresponding to the detector 22. In this way, the detector 22 can be adjusted relative to the X-ray source in the axial direction of the rotating frame 10 to ensure that the focus between the X-ray source 21 and the detector 22 in the imaging assembly is aligned.

[0043] It should be noted that, since the frame can selectively use the position adjustment mechanism 30 to adjust the position of the detector 22 relative to the X-ray source 21 in the axial direction of the rotating frame 10 according to the usage requirements, so as to ensure that the focal point between the X-ray source 21 and the detector 22 in the imaging assembly 20 is aligned, the requirements for the overall size control accuracy of the rotating frame 10 can be reduced, thereby reducing the cost.

[0044] In some embodiments, the number of imaging components 20 is configured as one set.

[0045] like Figure 1As shown, in some embodiments, the number of imaging components 20 is configured as multiple sets, preferably two sets. Specifically, the two sets of imaging components 20 can be set as a first imaging component 210 and a second imaging component 220. It can be understood that the mechanical positions of the two sets of imaging components 20 when installed on the rotating frame 10 have certain precision requirements, especially in the axial direction of the rotating frame 10. Therefore, the installation positions of the first imaging component 210 and the second imaging component 220 on the rotating frame 10 can be adjusted. The adjustment logic is as follows: First, the installation position of the detector 22 in the first imaging component 210... Using the position as a reference, adjust the installation position of the X-ray source 21 in the first imaging component 210; then, using the first imaging component 210 as a reference, adjust the installation position of the X-ray source 21 in the second imaging component 220; after the position of the X-ray source 21 in the second imaging component 220 is adjusted, if the position deviation of the detector 22 in the second imaging component 220 is large, it will affect the accuracy of the two imaging components 20, thus causing image quality problems. Therefore, the position adjustment mechanism 30 can be used to adjust the position of the detector 22 in the second imaging component 220 in the axial direction of the rotating frame 10. It should be noted that the number of imaging components 20 can also be configured to three or even more sets according to the needs of use, which will not be elaborated here.

[0046] like Figures 5 to 7 As shown, in some embodiments, the position adjustment mechanism 30 includes a fixed plate 31, a connecting plate 32, and an adjusting member 33. The fixed plate 31 is detachably connected and fixed to the rotating frame 10, and the connecting plate 32 is detachably connected and fixed to the detector 22. The adjusting member 33 is rotatably mounted on the fixed plate 31 and screwed to the connecting plate 32. This allows the position adjustment mechanism 30 to adjust the position of the detector 22 relative to the radiation source 21 in the axial direction of the rotating frame 10. First, the fixed plate 31 is connected and fixed to the rotating frame 10, and the connecting plate 32 is connected and fixed to the detector 22. Then, the screw connection between the adjusting member 33 and the connecting plate 32 is used. This allows the operator to simply screw the adjusting member 33 from outside the rotating frame 10, providing ample operating space and ease of operation.

[0047] like Figure 2 , Figures 5 to 7 As shown, in some embodiments, the fixing plate 31 is connected to the rotating frame 10 by threads, thereby achieving a detachable connection between the fixing plate 31 and the rotating frame 10, which facilitates the assembly and disassembly of the fixing plate 31 on the rotating frame 10. It is understood that in other embodiments, the fixing plate 31 and the rotating frame 10 may also be detachably connected by snap-fit ​​or adhesive, which will not be elaborated here.

[0048] like Figure 2 , Figures 5 to 7As shown, as a non-limiting example, the fixing plate 31 includes a fixing plate body 311 and two bent plate bodies 312. The two bent plate bodies 312 are arranged on both sides of the fixing plate body 311 and are connected to the fixing plate body 311 integrally. The fixing plate body 311 is arranged parallel to the connecting plate 32. The two bent plate bodies 312 can simultaneously abut against the rotating frame 10, and then be tightened and limited by screws (not shown) that pass through the bent plate bodies 312 and are screwed to the rotating frame 10, thereby realizing the assembly and fixation of the fixing plate 31 on the rotating frame 10. It can be understood that in other embodiments, the number of bent plate bodies 312 on the fixing plate 31 for screwing to the rotating frame 10 may be three, four, or even more, which will not be elaborated here.

[0049] In some embodiments, the connecting plate 32 is threaded to the detector 22, thereby enabling a detachable connection between the connecting plate 32 and the rotating frame 10. This facilitates the installation and removal of the connecting plate 32 from the detector 22. It is understood that in other embodiments, the connecting plate 32 and the detector 22 may also be detachably connected by snap-fit ​​or adhesive bonding, which will not be elaborated upon here. It should be noted that the number of connecting plates 32 can be configured as one or more, depending on the specific requirements, which will not be elaborated upon here.

[0050] like Figure 2 , Figures 4 to 7 As shown, as a non-limiting example, the connecting plate 32 has a first through hole 321 for a screw (not shown) to pass through, and the detector 22 has a threaded hole 223 for screwing with the screw. Thus, when the connecting plate 32 needs to be assembled and fixed to the detector 22, the first through hole 321 on the connecting plate 32 is first aligned with the threaded hole 223 on the detector 22, and then the screw, which passes through the first through hole 321 and screws into the threaded hole 223, is used to fix the connecting plate 32 to the detector 22. Here, the number of both the first through hole 321 and the threaded hole 223 is multiple, and the multiple first through holes 321 are arranged sequentially at intervals along the length of the connecting plate 32, so that the connecting plate 32 can be pressed and fixed to the detector 22 with multiple screws.

[0051] like Figures 5 to 8As shown, in some embodiments, the fixed plate 31 has a slot 313, and the adjusting member 33 can engage with the slot 313, so that the adjusting member 33 can be detachably assembled onto the fixed plate 31. This facilitates the assembly of the adjusting member 33 onto the fixed plate 31 and prevents the adjusting member 33 from shifting in the axial direction of the rotating frame 10 when it rotates on the fixed plate 31. Here, the bottom of the slot 313 is an arc surface, and the adjusting member 33 has a screwing head 331 and a limiting stop 332. When the adjusting member 33 is engaged with the slot 313, the limiting stop 332 and the screwing head 331 are arranged on the inner and outer sides of the fixed plate 31, realizing the engagement between the adjusting member 33 and the slot 313.

[0052] like Figure 8 As shown, in some embodiments, a scale mark 301 is formed between the screw head 331 and the fixed plate 31. When the operator screws the screw head 331, the scale mark 301 indicates the rotation angle of the adjusting member 33 on the fixed plate 31. This improves the accuracy of position adjustment of the detector 22 in the axial direction of the rotating frame 10, further facilitating the operator's adjustment operation. Here, the scale mark 301 includes a scale line 3011 marked around the end of the screw head 331 and a reference line 3012 marked on the fixed plate 31 directly below the adjusting member 33. The number of scale lines 3011 and the thread pitch of the threaded connection between the adjusting member 33 and the connecting plate 32 can be designed according to the required adjustment accuracy of the detector 22.

[0053] like Figures 5 to 7 As shown, in some embodiments, the number of adjusting members 33 is configured to be multiple. That is, when the position adjustment mechanism 30 is working, one or more adjusting members 33 can be used to drive the connecting plate 32 to move in the axial direction of the rotating frame 10, so that the connecting plate 32 can be subjected to force at multiple points and drive the detector 22 to adjust its position. Here, the number of adjusting members 33 is three, and the three adjusting members 33 are arranged sequentially at intervals along the length direction of the connecting plate 32. It can be understood that in other embodiments, the number of adjusting members 33 may also be one, two, four, or even more, which will not be elaborated here.

[0054] like Figure 9 , Figure 10 As shown, in some embodiments, a guide engagement structure 40 is formed between the detector 22 and the rotating frame 10; and the detector 22 can move along the axial direction of the rotating frame 10 under the guidance of the guide engagement structure 40, so that the detector 22 can be adjusted in the axial direction of the rotating frame 10 only, so as to meet the position adjustment mechanism 30's requirement for the detector 22 to be adjusted in the axial direction of the rotating frame 10.

[0055] like Figure 2 , Figure 3 , Figure 9 and Figure 10 As shown, as a non-limiting example, the aforementioned guiding and mating structure 40 is configured as a pin 41. A second through hole 221 is provided on the detector 22, through which the pin 41 passes and connects to the rotating frame 10. The wall of the second through hole 221 slides with the pin 41 in the axial direction of the rotating frame 10, thereby guiding the movement of the detector 22 on the rotating frame 10. Here, two pins 41 are configured, arranged on either side of the detector 22 along its length. It is understood that in other embodiments, the detector 22 and the rotating frame 10 can also be slidably connected via a slide rail, which will not be elaborated upon here.

[0056] like Figure 2 , Figure 3 , Figure 9 and Figure 10 As shown, in some embodiments, the frame assembly 100 further includes a locking member 50, which, after passing through the detector 22, can be connected to the rotating frame 10 for controlling the locking / unlocking of the detector 22 on the rotating frame 10. The detector 22 has a through hole 222 through which the locking member 50 passes, and the hole wall 2221 of the through hole 222 forms a preset gap 101 between the detector 22 and the locking member 50 in the axial direction of the rotating frame 10. This allows the detector 22 to be unlocked on the rotating frame 10 first when its position needs to be adjusted, by first using the locking member 50. Then, the detector 22 can be adjusted within the preset gap 101. After adjustment, the locking member 50 can be used to re-lock the detector 22 onto the rotating frame 10, ensuring that the position adjustment of the detector 22 on the rotating frame 10 does not affect its fixation on the rotating frame 10. Here, the locking element 50 can be configured as a bolt, thread, screw, etc., and connected to the rotating frame 10 by means of threads. It is understood that in other embodiments, the locking element 50 can also be configured as a pin and connected to the rotating frame 10 by means of a tight fit, which will not be elaborated here.

[0057] As can be seen from the above, when the detector 22 is adjusted in the axial direction of the rotating frame 10, the connecting plate 32 can be connected and fixed to the detector 22 first, and the fixing plate 31 can be connected and fixed to the rotating frame 10. If the detector 22 needs to be adjusted in the negative direction in the axial direction of the rotating frame 10, the adjusting part 33 can be turned clockwise. After the adjusting part 33 is tightened, the locking part 50 on the detector 22 is released. At this time, the entire detector 22 is in an unconstrained state in the axial direction of the rotating frame 10. Then, the adjusting part 33 is rotated clockwise. At this time, the detector 22 can move in the negative direction in the axial direction of the rotating frame 10 under the action of the adjusting part 33. Similarly, when it is necessary to adjust the detector 22 in the positive axial direction of the rotating frame 10: rotate the adjusting member 33 counterclockwise. When the adjusting member 33 is tightened, release the locking member 50 on the detector 22. At this time, the entire detector is in an unconstrained state in the axial direction of the rotating frame 10. Then, gently rotate the adjusting member 33 counterclockwise. At this time, the detector can move in the positive axial direction of the rotating frame 10 under the action of the adjusting member 33. Here, the negative axial direction of the rotating frame 10 is the retraction direction of the computed tomography scanner, and the positive axial direction of the rotating frame 10 is the infeed direction of the computed tomography scanner.

[0058] In addition, this application also provides a computed tomography scanner, including the rack assembly 100 described above.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A rack assembly, characterized by The rack assembly (100) includes a rotating rack (10) and an imaging assembly (20) mounted on the rotating rack (10), the imaging assembly (20) including a correspondingly disposed X-ray source (21) and a detector (22); The detector (22) is provided with a position adjustment mechanism (30) for adjusting the axial position of the detector (22) relative to the rotating frame (10).

2. The rack assembly of claim 1, wherein: The position adjustment mechanism (30) includes a fixed plate (31), a connecting plate (32), and an adjusting member (33). The fixed plate (31) is detachably fixedly connected to the rotating frame (10), the connecting plate (32) is detachably connected to the detector (22), and the adjusting member (33) is rotatably mounted on the fixed plate (31).

3. The rack assembly of claim 1, wherein, A guide fit structure (40) is formed between the detector (22) and the rotating frame (10); The detector (22) is able to move along the axial direction of the rotating frame (10) under the guidance of the guide fitting structure (40).

4. The rack assembly according to claim 2, characterized in that, The frame assembly (100) also includes a locking member (50), and the detector (22) has a through hole (222). The locking member (50) passes through the through hole (222) and is connected to the rotating frame (10). The hole wall (2221) of the through hole (222) forms a preset gap (101) between the locking member (50) and the rotating frame (10) in the axial direction.

5. The rack assembly according to claim 2, characterized in that, The connecting plate (32) is threaded to the detector (22).

6. The rack assembly according to claim 2, characterized in that, The fixing plate (31) is threaded to the rotating frame (10).

7. The rack assembly according to claim 2, characterized in that, The fixing plate (31) is provided with a slot (313), and the adjusting member (33) can engage with the slot (313).

8. The rack assembly according to claim 2, characterized in that, The adjusting member (33) has a screw head (331) which is disposed on the side of the fixing plate (31) opposite to the connecting plate (32); The screw head (331) and the fixing plate (31) are provided with scale marks (301).

9. The rack assembly according to claim 1, characterized in that, The number of imaging components (20) is configured to be multiple sets.

10. A computed tomography scanner, characterized in that, Includes the rack assembly (100) as described in any one of claims 1 to 9.

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