CBCT imaging calibration method and apparatus, and CBCT

Abstract

The application provides a CBCT imaging calibration method, belongs to the technical field of CBCT imaging mechanical calibration, and is applied to an imaging device, wherein the imaging device comprises a dental column and a jaw mounting plate arranged on the dental column, and the CBCT imaging calibration method comprises the following steps: controlling the dental column to move vertically and / or horizontally along a support, and locking the dental column to the support after the movement is completed; and / or controlling the jaw mounting plate to move horizontally along the top surface of the dental column and / or rotate vertically along the top of the dental column in a direction perpendicular to the horizontal movement direction of the aforementioned dental column, and locking the jaw mounting plate to the dental column after the movement is completed; in the application, the mechanism for adjusting the jaw and the lateral head clamp assembly is mostly adjusted through fasteners, so that the cost is low, the structure is simple, the on-site debugging of after-sales personnel can be facilitated, the rigid connection form is adopted, and the advantages of reliability and strong stability are achieved; compared with the traditional algorithm processing for image calibration, distortion of the image can be avoided.

Description

Technical Field

[0001] This invention relates to the field of CBCT imaging mechanical calibration technology, specifically to a CBCT imaging calibration method, apparatus, and CBCT. Background Technology

[0002] As we all know, in the field of CBCT, the images captured are an important basis for doctors' diagnosis. Therefore, image quality and clarity are very important to doctors. Geometric calibration is a key factor affecting image quality. At present, there are many geometric calibration and imaging calibration methods on the market. Most of them use post-processing algorithms to adjust the captured images, which will cause image distortion and cause great trouble for doctors' diagnosis. Summary of the Invention

[0003] This invention provides a CBCT imaging calibration method, device, and CBCT. The CBCT imaging calibration method adopts a mechanical adjustment method, which has the advantages of reliability and high stability. Compared with traditional algorithm processing for image calibration, it can avoid image distortion.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A CBCT imaging calibration method is applied to an imaging device, the imaging device including dental tray pillars and a jaw support plate disposed on the dental tray pillars. The CBCT imaging calibration method includes the following steps:

[0006] Control the vertical and / or horizontal movement of the dental tray post along the support, and lock the dental tray post to the support after the movement is completed; and / or

[0007] Control the occlusal bracket mounting plate to move horizontally along the top surface of the dental bracket post and / or rotate vertically along the top of the dental bracket post, perpendicular to the aforementioned horizontal movement direction of the dental bracket post, and lock the occlusal bracket mounting plate to the dental bracket post after the movement is completed.

[0008] Preferably, controlling the vertical movement of the denture post along the support includes the following steps:

[0009] The dental tray post moves vertically relative to the support through the vertical adjustment hole provided in its connecting part, and after the movement is completed, the vertical position of the dental tray post is locked by the vertical fastener.

[0010] Preferably, controlling the horizontal movement of the denture post along the support includes the following steps:

[0011] The dental tray post moves horizontally relative to the support through a first horizontal adjustment hole provided in its connecting part, and after the movement is completed, the horizontal position of the dental tray post is locked by a first horizontal fastener.

[0012] Preferably, controlling the occlusal bracket mounting plate to move horizontally along the top surface of the bracket post perpendicular to the aforementioned horizontal movement direction of the bracket post includes the following steps:

[0013] The chin support plate moves horizontally relative to the top surface of the dental tray post through the second horizontal adjustment hole provided in the dental tray post mounting part, and after the movement is completed, the horizontal position of the chin support plate is locked by the second horizontal fastener.

[0014] Preferably, controlling the vertical rotation of the occlusal bracket mounting plate along the top of the bracket post includes the following steps:

[0015] The chin support plate can rotate vertically relative to the top of the dental tray post through the steering adjustment hole provided in the dental tray post mounting part, and after the rotation is completed, the circumferential position of the chin support plate is locked by the second horizontal fastener.

[0016] A CBCT imaging calibration method is applied to an imaging device, the imaging device including dental tray pillars and a jaw support plate disposed on the dental tray pillars. The CBCT imaging calibration method includes the following steps:

[0017] Control the vertical and / or horizontal movement of the dental tray post along the support, and lock the dental tray post to the support after the movement is completed; and / or

[0018] Control the occlusal bracket mounting plate to move horizontally along the top surface of the dental tray post perpendicular to the horizontal direction of movement and / or rotate vertically along the top of the dental tray post, and lock the occlusal bracket mounting plate to the dental tray post after the movement is completed; and / or

[0019] The left and right clamps in the control side head clamp assembly move vertically relative to the head clamp body through the waist-shaped holes provided on their inner sides, and lock the left and right clamps to both sides of the head clamp body after the movement is completed.

[0020] Preferably, locking the left and right clamps to both sides of the head clamp body after movement includes the following steps:

[0021] During the process of the axial locking component being screwed into the abutment block, it contacts the inner inclined surface of the connecting shaft at the end of the head clamp body.

[0022] Driven by the reaction force of the inner inclined surface, the abutment block and clamping plate move closer to the connecting shaft; and

[0023] Ultimately, the clamping plate is fixed against and secured to the end of the connecting shaft.

[0024] This application also provides an apparatus for CBCT imaging calibration according to the aforementioned CBCT imaging calibration method, comprising an imaging device, the imaging device including a dental tray post and a jaw support plate disposed on the dental tray post, and further including a jaw support or lateral head clip assembly that can be used in conjunction with the jaw support plate, characterized in that the CBCT imaging calibration apparatus comprises:

[0025] A vertical adjustment hole is provided, which is vertically disposed in the dental tray post connection part, and a vertical fastener is provided in the vertical adjustment hole;

[0026] A first horizontal adjustment hole is horizontally disposed in the dental tray post connection part, and a first horizontal fastener is provided in the first horizontal adjustment hole;

[0027] A second horizontal adjustment hole is horizontally disposed on the dental tray post mounting portion along a direction perpendicular to the direction of the second horizontal adjustment hole, and a second horizontal fastener is provided within the second horizontal adjustment hole; and

[0028] A steering adjustment hole is horizontally disposed on the dental tray post mounting part. The steering adjustment hole is connected to a second horizontal adjustment hole. The second horizontal fastener passes through the second horizontal adjustment hole and the steering adjustment hole.

[0029] Preferably, the dental tray mounting part is provided with a steering mounting plate, the top of the steering mounting plate is provided with a horizontal mounting plate, the steering adjustment holes are symmetrically arranged at the four corners on the steering mounting plate, and the second horizontal adjustment holes are symmetrically arranged along the two opposite sides of the horizontal mounting plate.

[0030] Preferably, the steering adjustment hole is arc-shaped.

[0031] Preferably, the side-position head clamp assembly includes a head clamp body, connecting shafts disposed on both sides of the head clamp body, a clamp plate sleeved on the outer wall of the connecting shaft, and a locking assembly for locking the clamp plate to the outer wall of the connecting shaft.

[0032] Preferably, the locking assembly includes an abutment block disposed inside the clamping plate and located on the outer wall of the connecting shaft, a locking post threaded to the bottom of the abutment block, and an inclined groove formed on the outer wall of the connecting shaft for driving the abutment block to move axially along the connecting shaft.

[0033] This application also provides a CBCT, which uses the aforementioned CBCT imaging calibration method to adjust the position of the jaw support or lateral head clip assembly.

[0034] As can be seen from the above technical solutions, the present invention has the following beneficial effects:

[0035] 1. In this invention, when taking CT and panoramic images, the chin is placed on the jaw support. The jaw support can be adjusted up and down by moving the connecting part of the dental support post along the vertical adjustment hole and locking its position with a vertical fastener. It can also be adjusted left and right by moving the connecting part of the dental support post horizontally along the first horizontal adjustment hole and locking its position with a first horizontal fastener. The jaw support mounting plate can be adjusted forward and backward by moving horizontally along the second horizontal adjustment hole of the mounting part and locking its position with a second horizontal fastener. Finally, the jaw support mounting plate can be adjusted left and right by rotating left and right along the steering adjustment hole to meet the needs of CT and panoramic imaging in different scenarios. When taking lateral radiographs, the jaw support needs to be removed and a lateral head clip assembly inserted. This allows for similar adjustments to the lateral head clip's up / down, left / right, forward / backward, and horizontal rotation to meet the needs of lateral radiograph imaging in different scenarios. In this application, the mechanism for adjusting the chin rest and side head clamp components is mostly adjusted by fasteners, which is low in cost, simple in structure, and convenient for after-sales personnel to debug on-site. At the same time, the rigid connection has the advantages of reliability and strong stability. Compared with traditional algorithm processing for image calibration, it can avoid image distortion.

[0036] 2. In this invention, the dental tray post mounting part is provided with a steering mounting plate, and the top of the steering mounting plate is provided with a horizontal mounting plate. The steering adjustment hole is provided on the steering mounting plate, and the second horizontal adjustment hole is symmetrically arranged along the two opposite sides of the horizontal mounting plate. The dental tray mounting plate can not only move along the second horizontal adjustment hole to realize the horizontal (front and back) position adjustment of the dental tray, but also rotate slightly left and right along the steering adjustment hole to perform horizontal rotation, thereby satisfying the error of structural component processing and assembly.

[0037] 3. In this invention, when taking a lateral view film, after the calibration based on CT and panoramic view is completed, the lateral view head clamp assembly needs to be adjusted. The left and right clamps in the lateral view head clamp assembly can be adjusted up and down through the waist-shaped holes on their inner sides, and the clamps are locked to the end of the head clamp body by the locking pin, so as to facilitate the limiting and fixing of the adjusted left and right clamps. Attached Figure Description

[0038] Figure 1 A schematic diagram of the CBCT imaging calibration device provided by the present invention;

[0039] Figure 2 for Figure 1 Side view;

[0040] Figure 3 A schematic diagram of the dental tray post mounting section;

[0041] Figure 4 for Figure 1 A bottom view;

[0042] Figure 5 for Figure 4 A magnified view of part A in the middle;

[0043] Figure 6 for Figure 4 A magnified view of part B in the middle section;

[0044] Figure 7 for Figure 4 A magnified view of part C in the middle;

[0045] Figure 8 for Figure 4 A magnified view of part D in the middle;

[0046] Figure 9 This is a schematic diagram of the side-mounted head clamp assembly;

[0047] Figure 10 An exploded view showing the connection between the head clamp body and the clamping plate;

[0048] Figure 11 A schematic diagram of the clamping plate and its inner waist-shaped hole;

[0049] Figure 12 A flowchart of one embodiment of the CBCT imaging calibration method provided by the present invention;

[0050] Figure 13 The flowchart of two embodiments of the CBCT imaging calibration method provided by the present invention.

[0051] In the diagram: 10, dental tray post; 110, steering mounting plate; 120, horizontal mounting plate; 20, jaw support mounting plate; 30, jaw support; 40, lateral head clamp assembly; 410, head clamp body; 420, connecting shaft; 430, clamp plate; 441, abutment block; 442, locking post; 443, oblique groove; 50, vertical adjustment hole; 510, vertical fastener; 60, first horizontal adjustment hole; 610, first horizontal fastener; 70, second horizontal adjustment hole; 710, second horizontal fastener; 80, steering adjustment hole; 90, oblong hole. Detailed Implementation

[0052] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0053] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions: (Refer to...) Figure 12A CBCT imaging calibration method is applied to an imaging device, which includes a dental tray post and a jaw support mounting plate mounted on the dental tray post. It should be noted that the jaw support mounting plate in this embodiment can be used with either a jaw tray or a lateral head clamp assembly, and the jaw tray and lateral head clamp assembly are used selectively with the jaw support mounting plate. That is, during CT and panoramic imaging, the jaw support mounting plate works in conjunction with the jaw tray; specifically, the chin rests on the jaw tray. To ensure the final image quality, the jaw tray needs to be adjustable vertically, horizontally, and forward / backward. In addition, it must be able to rotate horizontally to accommodate errors in structural component processing and assembly. Furthermore, during lateral radiograph imaging, the jaw support mounting plate works in conjunction with the lateral head clamp assembly. At this time, the jaw tray needs to be removed and the lateral head clamp assembly inserted. During lateral radiograph imaging, it is necessary to ensure that the steel ball is centered on the ring in the image. After CT and panoramic calibration is completed, the lateral head clamp assembly needs to be adjusted.

[0054] Therefore, when taking CT and panoramic images using a jaw rest, the CBCT imaging calibration method in this embodiment includes the following steps:

[0055] S1: Control the dental tray post to move vertically and / or horizontally along the support, and lock the dental tray post to the support after the movement is completed.

[0056] Specifically, in this embodiment, the dental tray post is set on the bottom support. In order to realize the vertical movement of the jaw tray, this embodiment can drive the dental tray post to move vertically along the support by external force. The dental tray post then drives the jaw tray to adjust vertically and locks after the jaw tray has moved vertically. At the same time, in order to realize the horizontal (i.e. left and right) movement of the jaw tray, this embodiment can also drive the dental tray post to move horizontally along the support by external force. The dental tray post then drives the jaw tray to adjust horizontally and locks after the jaw tray has adjusted horizontally.

[0057] It should be noted that the vertical and horizontal movement of the dental tray pillars in S1 can be adjusted independently or simultaneously. That is, the vertical and horizontal movement of the dental tray pillars can be adjusted independently, or the vertical and horizontal movement of the dental tray pillars can be adjusted simultaneously. Adaptive adjustments can be made according to the actual needs of the scenario.

[0058] S2: Control the occlusal bracket mounting plate to move horizontally along the top surface of the dental bracket post perpendicular to the aforementioned horizontal movement direction of the dental bracket post and / or rotate vertically along the top of the dental bracket post, and lock the occlusal bracket mounting plate to the dental bracket post after the movement is completed.

[0059] Specifically, in order to achieve horizontal (i.e., front-to-back) movement of the occlusal tray, this embodiment can drive the occlusal tray mounting plate to move horizontally along the top surface of the dental tray post in a direction perpendicular to the aforementioned horizontal movement direction of the dental tray post. The occlusal tray mounting plate then drives the occlusal tray to adjust horizontal (i.e., front-to-back) movement, and locks it after the horizontal movement of the occlusal tray is completed. At the same time, in order to achieve rotational adjustment of the occlusal tray, this embodiment can also drive the occlusal tray mounting plate to rotate vertically along the top of the dental tray post to adjust the rotation of the occlusal tray, and locks it after the rotational adjustment of the occlusal tray is completed.

[0060] It should be noted that the horizontal movement and vertical rotation of the jaw support mounting plate in S2 can be adjusted independently or simultaneously. That is, the horizontal movement and vertical rotation of the jaw support mounting plate can be adjusted independently, or the horizontal movement and vertical rotation of the jaw support mounting plate can be adjusted simultaneously. Adaptive adjustments can be made according to the actual needs of the scenario.

[0061] As a preferred technical solution in this embodiment, controlling the vertical movement of the dental tray post along the support includes the following steps:

[0062] S11: The dental tray post moves vertically relative to the support through the vertical adjustment hole provided in its connecting part, and after the movement is completed, the vertical position of the dental tray post is locked by the vertical fastener.

[0063] The bottom end of the dental tray post is provided with a connecting part, which is used to connect with the external bottom support. Therefore, in order to realize the vertical movement adjustment of the dental tray post, a vertical adjustment hole is provided on the connecting part, and a vertical fastener is provided in the vertical adjustment hole. It should be noted that the vertical fastener can be a bolt or other component that provides a fixing effect. In use, when it is necessary to adjust the vertical position of the dental tray post to further adjust the height of the occlusal bracket, the dental tray post is driven to move vertically relative to the support. After the dental tray post has moved, the vertical fastener is used to fix the dental tray post.

[0064] It should be noted that the vertical adjustment holes and vertical fasteners are symmetrically arranged on the connecting part at the four corners.

[0065] Furthermore, controlling the horizontal movement of the denture post along the support includes the following steps:

[0066] S12: The dental tray post moves horizontally relative to the support through the first horizontal adjustment hole provided in its connecting part, and after the movement is completed, the horizontal position of the dental tray post is locked by the first horizontal fastener.

[0067] To enable horizontal (i.e. left-right) movement of the dental tray, a first horizontal adjustment hole is provided on the connecting part of the tray post. At the same time, a first horizontal fastener is provided in the first horizontal adjustment hole. The first horizontal adjustment hole is used to realize the horizontal movement of the tray post relative to the support. The first horizontal fastener is a component such as a bolt that provides a fixing effect. When it is necessary to adjust the horizontal (i.e. left-right) position of the dental tray, the connecting part of the tray post can be moved. After the tray post has moved horizontally, it can be locked by the first horizontal fastener.

[0068] It should be noted that the first horizontal adjustment hole and the first horizontal fastener are both arranged in a symmetrical manner on the connecting part.

[0069] As a preferred technical solution in this embodiment, controlling the occlusal bracket mounting plate to move horizontally along the top surface of the dental bracket post in a direction perpendicular to the aforementioned horizontal movement direction includes the following steps:

[0070] S21: The chin support mounting plate moves horizontally relative to the top surface of the dental tray post through the second horizontal adjustment hole provided in the dental tray post mounting part, and after the movement is completed, the horizontal position of the chin support mounting plate is locked by the second horizontal fastener.

[0071] The top of the dental tray post is provided with a mounting part. In order to realize the horizontal (i.e., front and back) movement of the tray, a second horizontal adjustment hole is provided in the mounting part, and the distribution direction of the second horizontal adjustment hole is perpendicular to the first horizontal adjustment hole. At the same time, a second horizontal fastener is provided in the second horizontal adjustment hole. In this way, when it is necessary to adjust the horizontal (i.e., front and back) position of the tray, the tray mounting plate can be moved along the second horizontal adjustment hole by driving it. After the adjustment is completed, it can be locked by the second horizontal fastener.

[0072] Furthermore, controlling the vertical rotation of the occlusal bracket mounting plate along the top of the bracket post includes the following steps:

[0073] S22: The chin support mounting plate rotates vertically relative to the top of the dental tray post through the steering adjustment hole provided in the dental tray post mounting part, and after the rotation is completed, the circumferential position of the chin support mounting plate is locked by the second horizontal fastener.

[0074] To enable horizontal rotation of the occlusal tray, a steering adjustment hole is provided on the mounting part of the tray post. It should be noted that the second horizontal fastener passes through the aforementioned second horizontal adjustment hole and steering adjustment hole. That is, the second horizontal fastener is located inside both the second horizontal adjustment hole and the steering adjustment hole. This not only enables horizontal (i.e., back and forth) movement of the occlusal tray, but also horizontal rotation of the occlusal tray. After the occlusal tray mounting plate has rotated vertically relative to the top of the tray post, the position can be locked using the second horizontal fastener.

[0075] Reference Figure 13In some embodiments, specifically when taking lateral radiographs, the chin rest needs to be removed and the lateral head clip assembly inserted. Furthermore, it is crucial to ensure the steel ball is centered on the ring in the image during lateral radiograph capture. Therefore, the lateral head clip needs adjustment after CT and panoramic calibration. Thus, this CBCT imaging calibration method further includes:

[0076] S3: Control the left and right clamps in the side head clamp assembly to move vertically relative to the head clamp body through the waist-shaped holes provided on their inner sides, and lock the left and right clamps to both sides of the head clamp body after the movement is completed.

[0077] Specifically, the left and right clamps are provided with waist-shaped holes on their inner sides. The vertical position of the left and right clamps relative to the head clamp body can be adjusted through these waist-shaped holes to achieve position adjustment of the left and right clamps. After adjustment, the left and right clamps are locked to both sides of the head clamp body.

[0078] Furthermore, locking the left and right clamps to both sides of the head clamp body after the movement is completed includes the following steps:

[0079] S31: The axial locking element contacts the inner inclined surface of the connecting shaft at the end of the head clamp body during the process of screwing in along the abutment block.

[0080] Specifically, as the axial locking component inside the abutment block is screwed into the abutment block, it gradually comes into contact with the inner inclined surface of the connecting shaft at the end of the head clamp body. Since the connecting shaft is fixed, the axial locking component will be subject to the resistance of the inner inclined surface of the connecting shaft during the screwing process.

[0081] S32: Driven by the reaction force of the inner inclined plane, the abutment block and clamping plate move closer to the connecting shaft.

[0082] Specifically, under the reaction force of the inclined surface resistance inside the connecting shaft, the abutment block and the clamping plate will passively move closer to the inside of the connecting shaft.

[0083] S33: This ultimately allows the clamping plate to be fixed against the end of the connecting shaft.

[0084] Specifically, as the axial locking component continues to move inward toward the connecting shaft, the inner inclined surface of the connecting shaft continues to react with the axial locking component, ultimately causing the clamping plate to abut and be fixed to the end of the connecting shaft, thus achieving the positioning of the left and right clamping plates.

[0085] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9This application also provides a device for CBCT imaging calibration using the aforementioned CBCT imaging calibration method, including an imaging device. The imaging device includes a dental tray post 10 and a jaw support plate 20 disposed on the dental tray post, and also includes a jaw support 30 or a lateral head clamp assembly 40 that can be used in conjunction with the jaw support plate. The bottom of the dental tray post 10 is provided with a connecting part for connecting to an external support, and the top of the dental tray post is provided with a mounting part for mounting the jaw support plate. The CBCT imaging calibration device includes a vertical adjustment hole 50, a first horizontal adjustment hole 60, a second horizontal adjustment hole 70, and a steering adjustment hole 80. The vertical adjustment hole is vertically disposed at the connecting part of the dental tray post 10, and a vertical fastener 510 is disposed within the vertical adjustment hole. The first horizontal adjustment hole is horizontally disposed at the connecting part of the dental tray post 10, and a first horizontal fastener 610 is disposed within the first horizontal adjustment hole. The second horizontal adjustment hole is perpendicular to the second horizontal adjustment hole. The hole is horizontally positioned in the mounting part of the dental tray post 10. A second horizontal fastener 710 is provided within the second horizontal adjustment hole. The steering adjustment hole is horizontally positioned in the mounting part of the dental tray post 10 and is connected to the second horizontal adjustment hole 70. The second horizontal fastener 710 passes through the second horizontal adjustment hole 70 and the steering adjustment hole 80. In use, the dental tray can be adjusted up and down by driving the connecting part of the dental tray post to move up and down along the vertical adjustment hole and locking its position with the vertical fastener; the dental tray can be adjusted left and right by driving the connecting part of the dental tray post to move horizontally along the first horizontal adjustment hole and locking its position with the first horizontal fastener; the dental tray can be adjusted forward and backward by driving the mounting plate of the dental tray to move horizontally along the second horizontal adjustment hole of the mounting part and locking its position with the second horizontal fastener; and the dental tray can be adjusted left and right by driving the mounting plate of the dental tray to rotate left and right along the steering adjustment hole.

[0086] In addition, when taking lateral radiographs, the jaw support needs to be removed and the lateral head clamp assembly inserted. When taking lateral radiographs, it is necessary to ensure that the steel ball is in the center of the ring in the image. Therefore, after the CT and panoramic calibrations are completed, the lateral head clamp assembly needs to be adjusted. Thus, the clamp itself needs to have an adjustment function. The clamp of this application can be adjusted up and down through the waist-shaped hole on its inner side to ensure that the steel ball is in the center of the ring in the image.

[0087] Furthermore, refer to Figure 3The dental tray mounting section is provided with a swivel mounting plate 110, and a horizontal mounting plate 120 is provided on the top of the swivel mounting plate. The swivel adjustment holes 80 are symmetrically arranged at the four corners on the swivel mounting plate 110. The second horizontal adjustment holes 70 are symmetrically arranged along the two opposite sides of the horizontal mounting plate 120. In use, the second horizontal fastener passes through the second horizontal adjustment hole and the swivel adjustment hole. In this way, the dental tray mounting plate can not only move along the second horizontal adjustment hole to realize the horizontal (i.e., front and back) position adjustment of the dental tray, but also rotate slightly left and right along the swivel adjustment hole to perform horizontal rotation, thereby meeting the error of structural component processing and assembly.

[0088] Furthermore, the steering adjustment hole 80 is arc-shaped.

[0089] Reference Figure 10 , Figure 11 In some embodiments, the side-mounted head clamp assembly 40 includes a head clamp body 410, a connecting shaft 420, a clamping plate 430, and a locking assembly. The connecting shaft 420 is symmetrically arranged on both sides of the head clamp body. The clamping plate 430 is sleeved on the outer wall of the connecting shaft. The locking assembly is used to lock the clamping plate to the outer wall of the connecting shaft. A waist-shaped hole 90 is provided on the inner side wall of the clamping plate. In use, the vertical position of the clamping plate relative to the head clamp body can be adjusted through the waist-shaped hole, and it can be fixed by the locking assembly after adjustment. Further, the locking assembly includes an abutment block 441, a locking pin 442, and an inclined groove 443. The abutment block 441 is disposed inside the clamping plate 430 and is located on the outer wall of the connecting shaft 420. The locking pin 442 is threaded to the bottom of the abutment block. The inclined groove 443 is formed on the connecting shaft. The outer wall of 420 has an inclined groove with an inner inclined surface that slopes inward from the outer wall of the connecting shaft. This inclined groove 443 is used to drive the abutment block to move axially along the connecting shaft 420 when it contacts the locking pin, so that the clamping plate abuts against the end of the connecting shaft. It should be noted that the top of the locking pin has a curved surface that matches the inclined surface of the inclined groove. In use, the vertical position of the clamping plate relative to the head clamp body is adjusted by using the waist-shaped hole. After the clamping plate is adjusted, the locking pin is rotated and rotated into the abutment block. When the curved surface at the top of the locking pin contacts the inner inclined surface of the inclined groove, the locking pin is obstructed by the inclined surface. As the locking pin continues to rotate, the inner inclined surface of the inclined groove continues to obstruct the locking pin. The locking pin is obstructed and passively moves axially along the connecting shaft, and drives the clamping plate to abut against the end of the connecting shaft, thereby locking the clamping plate.

[0090] This application also provides a CBCT, which uses the aforementioned CBCT imaging calibration method to adjust the position of the jaw rest or lateral head clamp assembly. This allows for vertical, horizontal, front-back, and horizontal rotation adjustment of the jaw rest during CT and panoramic imaging to meet the needs of different CT and panoramic imaging scenarios. Simultaneously, when taking lateral radiographs, the jaw rest can be removed and the lateral head clamp assembly inserted to achieve vertical, horizontal, front-back, and horizontal rotation adjustment of the lateral head clamp to meet the needs of different lateral radiograph imaging scenarios. Furthermore, the clamp plate in the lateral head clamp assembly itself has an adjustment function, and vertical adjustment can be achieved through the waist-shaped hole on the inner side of the clamp plate, thereby ensuring that the clamp plate position meets the imaging requirements.

[0091] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A CBCT imaging calibration apparatus, comprising an imaging device, characterized in that, The imaging device includes a dental tray post, a jaw support plate mounted on the dental tray post, and a jaw support and lateral head clamp assembly that can be used in conjunction with the jaw support plate. The dental tray post can be controlled to move vertically and / or horizontally along the support, and after the movement is completed, the dental tray post is locked to the support; and / or the jaw support plate can be controlled to move horizontally along the top surface of the dental tray post in a direction perpendicular to the horizontal movement of the dental tray post and / or rotate vertically along the top of the dental tray post, and after the movement is completed, the jaw support plate is locked to the dental tray post; the dental tray post moves horizontally relative to the support through a first horizontal adjustment hole provided in its connecting part, and after the movement is completed, the horizontal position of the dental tray post is locked by a first horizontal fastener; the jaw support plate moves horizontally relative to the top surface of the dental tray post through a second horizontal adjustment hole provided in the dental tray post mounting part, and after the movement is completed, the horizontal position of the jaw support plate is locked by a second horizontal fastener; the jaw support... The mounting plate rotates vertically relative to the top of the dental tray post through the steering adjustment hole provided in the dental tray post mounting part, and after rotation, the circumferential position of the mounting plate is locked by the second horizontal fastener; the side head clamp assembly includes a head clamp body, a connecting shaft, a clamp plate and a locking assembly. The connecting shaft is symmetrically arranged on both sides of the head clamp body. The clamp plate is sleeved on the outer wall of the connecting shaft. The locking assembly is used to lock the clamp plate to the outer wall of the connecting shaft. A waist-shaped hole is provided on the inner side wall of the clamp plate. The locking assembly includes an abutment block, a locking post and an inclined groove. The abutment block is located inside the clamp plate and is located on the outer wall of the connecting shaft. The locking post is threaded to the bottom of the abutment block. The inclined groove is opened on the outer wall of the connecting shaft. The inclined groove has an inner inclined surface that slopes inward from the outer wall of the connecting shaft. The inclined groove is used to drive the abutment block to move axially along the connecting shaft when in contact with the locking post, so that the clamp plate abuts against the end of the connecting shaft; The CBCT imaging calibration device includes: A vertical adjustment hole is provided in the connection part of the dental tray post, and a vertical fastener is provided in the vertical adjustment hole; A first horizontal adjustment hole is horizontally set in the dental tray post connection part, and a first horizontal fastener is provided in the first horizontal adjustment hole; A second horizontal adjustment hole is horizontally disposed in the mounting portion of the dental tray post along a direction perpendicular to the second horizontal adjustment hole; a second horizontal fastener is provided within the second horizontal adjustment hole; and A steering adjustment hole is horizontally positioned at the mounting part of the dental bracket post. This steering adjustment hole communicates with a second horizontal adjustment hole, and a second horizontal fastener passes through both the second horizontal adjustment hole and the steering adjustment hole. The dental prosthesis mounting part is provided with a steering mounting plate, and the top of the steering mounting plate is provided with a horizontal mounting plate. The steering adjustment holes are symmetrically arranged at the four corners on the steering mounting plate, and the second horizontal adjustment holes are symmetrically arranged along the two opposite sides of the horizontal mounting plate. The steering adjustment holes are arc-shaped.

2. The CBCT imaging calibration apparatus as described in claim 1, characterized in that, The dental tray post is controlled to move vertically along the support. The dental tray post moves vertically relative to the support through the vertical adjustment hole provided in its connecting part, and the vertical position of the dental tray post is locked by the vertical fastener after the movement is completed.

Images