CBCT imaging calibration method and device and CBCT

Abstract

The invention provides a CBCT (Cone Beam Computed Tomography) imaging calibration method, which belongs to the technical field of CBCT imaging mechanical calibration and is applied to imaging equipment, the imaging equipment comprises a denture column and a jaw support mounting plate arranged on the denture column, and the CBCT imaging calibration method comprises the following steps: controlling the denture column to vertically and / or horizontally move along a support; after the movement is completed, the denture column is locked on the support; and / or controlling the jaw support mounting plate to horizontally move along the top surface of the denture column and / or vertically rotate along the top of the denture column in a direction perpendicular to the horizontal movement direction of the denture column, and locking the jaw support mounting plate on the denture column after the movement is completed; most mechanisms for adjusting the jaw support and the side head clamp assembly are adjusted through fasteners, the cost is low, the structure is simple, on-site debugging of after-sales personnel can be facilitated, meanwhile, the rigid connection mode is adopted, the advantages of reliability and high stability are achieved, and compared with traditional algorithm processing for image calibration, the method has the advantage of being high in practicability. And image distortion can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of CBCT imaging mechanical calibration, and in particular to a CBCT imaging calibration method, a device and a CBCT. Background Art

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

[0003] The present invention provides a CBCT imaging calibration method, device and CBCT, wherein the CBCT imaging calibration method adopts a mechanical adjustment method, has the advantages of reliability and strong stability, and can avoid image distortion compared with traditional algorithm processing for image calibration.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: A CBCT imaging calibration method is applied to an imaging device, wherein the imaging device includes a dental bracket column and a jaw bracket mounting plate arranged on the dental bracket column. The CBCT imaging calibration method includes the following steps: Controlling the dental bracket to move vertically and / or horizontally along the support, and locking the dental bracket to the support after the movement is completed; and / or The jaw support mounting plate is controlled to horizontally move along the top surface of the dental bracket column and / or to vertically rotate along the top of the dental bracket column in a direction perpendicular to the horizontal movement direction of the dental bracket column, and the jaw support mounting plate is locked to the dental bracket column after the movement is completed.

[0005] Preferably, controlling the vertical movement of the bracket column along the support comprises the following steps: The dental bracket column moves vertically relative to the support through the vertical adjustment hole provided at its connection part, and the vertical position of the dental bracket column is locked by the vertical fastener after the movement is completed.

[0006] Preferably, controlling the horizontal movement of the bracket post along the support comprises the following steps: The dental bracket column moves horizontally relative to the support through a first horizontal adjustment hole provided at its connecting portion, and after the movement is completed, the horizontal position of the dental bracket column is locked through a first horizontal fastener.

[0007] Preferably, controlling the jaw support mounting plate to move horizontally along the top surface of the dental bracket column in a direction perpendicular to the horizontal movement direction of the dental bracket column comprises the following steps: The jaw support mounting plate moves horizontally relative to the top surface of the bracket column through the second horizontal adjustment hole provided on the bracket column mounting part, and the horizontal position of the jaw support mounting plate is locked by the second horizontal fastener after the movement is completed.

[0008] Preferably, controlling the jaw support mounting plate to rotate vertically along the top of the bracket column comprises the following steps: The jaw support mounting plate is vertically rotated relative to the top of the dental bracket column through the steering adjustment hole provided on the dental bracket column mounting part, and the circumferential position of the jaw support mounting plate is locked by the second horizontal fastener after the rotation is completed.

[0009] A CBCT imaging calibration method is applied to an imaging device, wherein the imaging device includes a dental bracket column and a jaw bracket mounting plate arranged on the dental bracket column. The CBCT imaging calibration method includes the following steps: Controlling the dental bracket to move vertically and / or horizontally along the support, and locking the dental bracket to the support after the movement is completed; and / or Control the jaw support mounting plate to move horizontally along the top surface of the dental bracket column perpendicular to the horizontal movement direction of the dental bracket column and / or rotate vertically along the top of the dental bracket column, and lock the jaw support mounting plate to the dental bracket column after the movement is completed; and / or The left and right clamping plates in the side head clamp assembly are controlled to move vertically relative to the head clamp body through waist-shaped holes arranged on the inner sides thereof, and the left and right clamping plates are locked on both sides of the head clamp body after the movement is completed.

[0010] Preferably, locking the left and right clamps on both sides of the head clamp body after the movement is completed includes the following steps: The axial locking piece contacts the inner inclined surface of the connecting shaft at the end of the head clamp body during the process of being screwed in along the abutment block; The abutment block and the clamping plate are driven to approach the connecting shaft by the reaction force of the inner inclined surface; and Finally, the clamping plate is abutted and fixed on the end of the connecting shaft.

[0011] The present application also provides a device for CBCT imaging calibration according to the aforementioned CBCT imaging calibration method, comprising an imaging device, wherein the imaging device comprises a dental bracket column and a jaw bracket mounting plate arranged on the dental bracket column, and further comprises a jaw bracket or lateral head clamp assembly that can be used in conjunction with the jaw bracket mounting plate, characterized in that the CBCT imaging calibration device comprises: A vertical adjustment hole, wherein the vertical adjustment hole is vertically arranged at the connection portion of the bracket column, and a vertical fastener is arranged in the vertical adjustment hole; A first horizontal adjustment hole, the first horizontal adjustment hole is horizontally arranged at the connection part of the bracket column, and a first horizontal fastener is arranged in the first horizontal adjustment hole; A second horizontal adjustment hole, the second horizontal adjustment hole is horizontally arranged on the bracket column mounting portion along a direction perpendicular to the second horizontal adjustment hole, and a second horizontal fastener is arranged in the second horizontal adjustment hole; and A steering adjustment hole is horizontally arranged on the bracket column mounting portion, the steering adjustment hole is connected to the second horizontal adjustment hole, and the second horizontal fastener passes through the second horizontal adjustment hole and the steering adjustment hole.

[0012] Preferably, the bracket column mounting portion is provided with a steering mounting plate, a horizontal mounting plate is provided on the top of the steering mounting plate, the steering adjustment holes are symmetrically arranged on the steering mounting plate, and the second horizontal adjustment holes are symmetrically arranged along two opposite sides of the horizontal mounting plate.

[0013] Preferably, the steering adjustment hole is arc-shaped.

[0014] Preferably, the side head clamp assembly includes a head clamp body, connecting shafts arranged on both sides of the head clamp body, a clamping plate sleeved on the outer wall of the connecting shaft, and a locking assembly for locking the clamping plate to the outer wall of the connecting shaft.

[0015] Preferably, the locking assembly includes an abutment block arranged inside the clamp and located on the outer wall of the connecting shaft, a locking column threadedly connected to the bottom of the abutment block, and an oblique groove opened on the outer wall of the connecting shaft and used to drive the abutment block to move axially along the connecting shaft.

[0016] The present application also provides a CBCT, which uses the aforementioned CBCT imaging calibration method to adjust the position of a jaw support or lateral head clamp assembly.

[0017] It can be seen from the above technical solutions that the present invention has the following beneficial effects: 1. In the present invention, when taking CT and panoramic views, the person's chin is placed on the jaw rest, and the jaw rest can be adjusted up and down by driving the connecting portion of the dental support column to move up and down along the vertical adjustment hole and locked in position by the vertical fastener. The jaw rest can be adjusted left and right by driving the connecting portion of the dental support column to move horizontally along the first horizontal adjustment hole and locked in position by the first horizontal fastener. The jaw rest can be adjusted front and back by driving the jaw rest mounting plate to move horizontally along the second horizontal adjustment hole of the mounting portion and locked in position by the second horizontal fastener. The jaw rest can be adjusted to rotate left and right by driving the jaw rest mounting plate to rotate left and right along the steering adjustment hole to meet the CT and panoramic shooting requirements of different scenes. When taking lateral views, the jaw rest needs to be removed and the lateral head clamp assembly needs to be inserted, and the lateral head clamp can also be adjusted up and down, left and right, front and back, and horizontally to meet the lateral view shooting requirements of different scenes. In the present application, the mechanisms for adjusting the jaw support and lateral head clamp components are mostly adjusted through fasteners, which are low-cost and simple in structure, and can be convenient for on-site debugging by after-sales personnel. At the same time, they adopt a rigid connection form, which has the advantages of reliability and strong stability. Compared with traditional algorithm processing for image calibration, it can avoid distortion of the image.

[0018] 2. In the present invention, a steering mounting plate is provided at the mounting portion of the tooth support column, a horizontal mounting plate is provided at the top of the steering mounting plate, a steering adjustment hole is provided on the steering mounting plate, and the second horizontal adjustment holes are symmetrically provided along two opposite sides of the horizontal mounting plate. The jaw support mounting plate can not only move along the second horizontal adjustment hole to achieve the horizontal position adjustment of the jaw support, i.e., the front and rear position adjustment, but also can make a small range of left and right rotation along the steering adjustment hole to perform horizontal rotation, thereby meeting the errors of structural parts processing and assembly.

[0019] 3. In the present invention, when taking a lateral view, the lateral head clamp assembly needs to be adjusted after the calibration based on CT and panoramic view is completed. The left and right clamps in the lateral head clamp assembly can be adjusted up and down through the waist-shaped holes on the inner side thereof, and the clamps can be locked to the ends of the head clamp body through the locking columns, thereby facilitating the limiting and fixing of the adjusted left and right clamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a CBCT imaging calibration device provided by the present invention; Figure 2 for Figure 1 Side view of Figure 3 It is a structural schematic diagram of the mounting part of the dental bracket; Figure 4 for Figure 1 Bottom view of Figure 5 for Figure 4 A partial enlarged view of part A; Figure 6 for Figure 4 A partial enlarged view of part B; Figure 7 for Figure 4 A partial enlarged view of part C in the middle; Figure 8 for Figure 4 A partial enlarged view of part D in the middle; Fig. 9 It is a structural schematic diagram of the side head clamp assembly; Fig.10 It is an exploded view of the connection between the head clamp body and the clamp plate; Fig.11 It is a schematic diagram of the splint and its inner waist-shaped hole; Fig.12 A flow chart of an embodiment of the CBCT imaging calibration method provided by the present invention; Fig.13 This is a flow chart of a second embodiment of the CBCT imaging calibration method provided by the present invention.

[0021] In the figure: 10, dental bracket column; 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, clamping plate; 441, abutment block; 442, locking column; 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, waist-shaped hole. DETAILED DESCRIPTION

[0022] A preferred embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0023] To achieve the above purpose, the embodiment of the present invention adopts the following technical solution: Fig.12 , a CBCT imaging calibration method is applied to an imaging device, the imaging device includes a dental bracket column and a jaw bracket mounting plate arranged on the dental bracket column. It should be noted that the jaw bracket mounting plate in this embodiment can be used in conjunction with a jaw bracket or a lateral head clamp assembly, and the jaw bracket and the lateral head clamp assembly are used in conjunction with the jaw bracket mounting plate in a selective manner, that is, when taking CT and panoramic images, the jaw bracket mounting plate works in conjunction with the jaw bracket. Specifically, a person's chin is placed on the jaw bracket, and in order to ensure the final image quality, the jaw bracket needs to be adjusted up and down, left and right, and front and back. In addition, it is also necessary to ensure that it can be rotated horizontally to meet the errors of structural parts processing and assembly; in addition, when taking a lateral film, the jaw bracket mounting plate works in conjunction with the lateral head clamp assembly. At this time, the jaw bracket needs to be removed and the lateral head clamp assembly needs to be inserted. When taking a lateral film, it is necessary to ensure that the steel ball is in the center of the ring on the image, and the lateral head clamp assembly needs to be adjusted after the CT and panoramic calibration is completed.

[0024] Therefore, when taking CT and panoramic images through a jaw support, the CBCT imaging calibration method of this embodiment includes the following steps: S1: Control the dental bracket to move vertically and / or horizontally along the support, and lock the dental bracket to the support after the movement is completed.

[0025] Specifically, the dental bracket column in the present embodiment is arranged on the bottom support. In order to realize the up and down movement of the jaw support, the present embodiment can drive the dental bracket column to move vertically along the support by external force, and the dental bracket column then drives the jaw support to adjust up and down, and locks it after the up and down movement of the jaw support is completed; at the same time, in order to realize the horizontal (i.e. left and right) movement of the jaw support, the present embodiment can also drive the dental bracket column to move horizontally along the support by external force, and the dental bracket column then drives the horizontal adjustment of the jaw support, and locks it after the horizontal adjustment of the jaw support is completed.

[0026] It should be noted that the vertical and horizontal movements of the bracket columns in S1 can be adjusted independently or simultaneously, that is, the vertical adjustment of the bracket columns can be performed independently, the horizontal adjustment of the bracket columns can be performed independently, or the vertical and horizontal movements of the bracket columns can be adjusted simultaneously, and adaptive adjustments can be made according to the needs of actual scenarios.

[0027] S2: Control the jaw support mounting plate to horizontally move along the top surface of the bracket column perpendicular to the horizontal movement direction of the bracket column and / or to vertically rotate along the top of the bracket column, and lock the jaw support mounting plate to the bracket column after the movement is completed.

[0028] Specifically, in order to achieve horizontal (i.e., front and back) movement of the jaw support, the present embodiment can drive the jaw support mounting plate by external force to move horizontally along the top surface of the bracket column perpendicular to the aforementioned horizontal movement direction of the bracket column, and the jaw support mounting plate then drives the horizontal (i.e., front and back) movement adjustment of the jaw support, and locks it after the horizontal movement of the jaw support is completed; at the same time, in order to achieve rotational adjustment of the jaw support, the present embodiment can also drive the jaw support mounting plate by external force to rotate vertically along the top of the bracket column to rotationally adjust the jaw support, and lock it after the rotational adjustment of the jaw support is completed.

[0029] 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 of the jaw support mounting plate can be performed independently, the vertical rotation of the jaw support mounting plate can be performed independently, or the horizontal movement and vertical rotation of the jaw support mounting plate can be adjusted synchronously, and adaptive adjustments can be made according to the needs of actual scenarios.

[0030] As a preferred technical solution of this embodiment, controlling the vertical movement of the bracket column along the support includes the following steps: S11: The dental bracket column moves vertically relative to the support through the vertical adjustment hole provided at its connection part, and after the movement is completed, the vertical position of the dental bracket column is locked by the vertical fastener.

[0031] A connecting portion is provided at the bottom end of the dental bracket column, which is used to be connected to an external bottom support. Therefore, in order to realize the vertical movement adjustment of the dental bracket column, a vertical adjustment hole is opened on the connecting portion, and a vertical fastener is provided in the vertical adjustment hole. It should be noted that the vertical fastener can be a component such as a bolt that has a fixing effect. When in use, when it is necessary to adjust the vertical position of the dental bracket column to further adjust the height of the jaw support, the dental bracket column is driven to move vertically relative to the support. After the movement of the dental bracket column is completed, the dental bracket column is fixed using the vertical fastener.

[0032] It should be noted that the vertical adjustment holes and the vertical fasteners are arranged on the connecting portion in a quadrilaterally symmetrical manner.

[0033] Furthermore, controlling the horizontal movement of the bracket post along the support includes the following steps: S12: The dental bracket column moves horizontally relative to the support through a first horizontal adjustment hole provided at its connecting portion, and after the movement is completed, the horizontal position of the dental bracket column is locked by a first horizontal fastener.

[0034] In order to realize the horizontal (i.e. left and right) movement of the jaw support, a first horizontal adjustment hole is further opened on the connecting part of the bracket column, and a first horizontal fastener is arranged in the first horizontal adjustment hole. The first horizontal adjustment hole is used to realize the horizontal movement of the bracket column relative to the support. The first horizontal fastener is a component such as a bolt that has a fixing effect. When the horizontal (i.e. left and right) position of the jaw support needs to be adjusted, it can be done by moving the connecting part of the bracket column, and the bracket column can be locked by the first horizontal fastener after the horizontal movement is completed.

[0035] It should be noted that the first horizontal adjustment hole and the first horizontal fastener are both arranged on the connecting portion in a quadrilaterally symmetrical manner.

[0036] As a preferred technical solution of this embodiment, controlling the jaw support mounting plate to move horizontally along the top surface of the dental bracket column perpendicular to the horizontal movement direction of the dental bracket column comprises the following steps: S21: The jaw support mounting plate moves horizontally relative to the top surface of the bracket column through the second horizontal adjustment hole provided on the bracket column mounting portion, and after the movement is completed, the jaw support mounting plate is locked in a horizontal position through a second horizontal fastener.

[0037] A mounting portion is provided at the top of the dental tray column. In order to realize the horizontal (i.e. front and back) movement of the jaw support, a second horizontal adjustment hole is opened in the mounting portion, 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 the horizontal (i.e. front and back) position of the jaw support needs to be adjusted, the jaw support mounting plate can be driven to move along the second horizontal adjustment hole. After the adjustment is completed, it can be locked by the second horizontal fastener.

[0038] Furthermore, controlling the jaw support mounting plate to rotate vertically along the top of the bracket column includes the following steps: S22: The jaw support mounting plate is vertically rotated relative to the top of the bracket column through the steering adjustment hole provided on the bracket column mounting portion, and the circumferential position of the jaw support mounting plate is locked by the second horizontal fastener after the rotation is completed.

[0039] In order to realize the horizontal rotation of the jaw rest, a steering adjustment hole is opened on the mounting part of the bracket column. It should be noted that the second horizontal fastener runs through the aforementioned second horizontal adjustment hole and the steering adjustment hole, that is, the second horizontal fastener is located inside the second horizontal adjustment hole and the steering adjustment hole at the same time, so that not only the horizontal (i.e. front and back) movement of the jaw rest can be realized, but also the horizontal rotation of the jaw rest can be realized, and after the vertical rotation of the jaw rest mounting plate relative to the top of the bracket column is completed, the second horizontal fastener can be used to lock the position.

[0040] Reference Fig.13 In some embodiments, when taking a lateral view, the jaw support needs to be removed and a lateral head clamp assembly needs to be inserted, and when taking a lateral view, the steel ball on the image needs to be ensured to be in the center of the ring. Therefore, after the calibration of CT and panoramic view is completed, the lateral head clamp needs to be adjusted. Therefore, the CBCT imaging calibration method also includes: S3: Control the left and right clamping plates in the side head clamp assembly to move vertically relative to the head clamp body through the waist-shaped holes arranged on the inner sides thereof, and lock the left and right clamping plates on both sides of the head clamp body after the movement is completed.

[0041] Specifically, waist-shaped holes are provided on the inner sides of the left and right clamps, and the vertical positions of the left and right clamps relative to the head clamp body can be adjusted through the waist-shaped holes to achieve position adjustment of the left and right clamps, and at the same time, the left and right clamps are locked on both sides of the head clamp body after the adjustment is completed.

[0042] Furthermore, locking the left and right clamps on both sides of the head clamp body after the movement is completed includes the following steps: S31: The axial locking piece contacts the inner inclined surface of the connecting shaft at the end of the head clamp body during the process of being screwed in along the abutment block.

[0043] Specifically, when the axial locking piece inside the abutment block is screwed into the abutment block, it gradually contacts 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 piece will be resisted by the inner inclined surface of the connecting shaft during the screwing process.

[0044] S32: Driven by the reaction force of the inner inclined surface, the abutment block and the clamping plate are driven to approach the connecting shaft.

[0045] Specifically, under the reaction 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.

[0046] S33: Finally, the clamping plate is abutted and fixed against the end of the connecting shaft.

[0047] Specifically, as the axial locking piece continues to move toward the inside of the connecting shaft, the inner inclined surface of the connecting shaft continues to react against the axial locking piece, and eventually the clamping plate is abutted and fixed to the end of the connecting shaft, thereby achieving the positioning of the left and right clamping plates.

[0048] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9The present application also provides a device for CBCT imaging calibration by the aforementioned CBCT imaging calibration method, including an imaging device, the imaging device including a dental bracket column 10 and a jaw bracket mounting plate 20 arranged on the dental bracket column, and also including a jaw bracket 30 or a lateral head clamp assembly 40 that can be used in conjunction with the jaw bracket mounting plate, the bottom of the dental bracket column 10 is provided with a connecting portion for connecting to an external support, the top of the dental bracket column is provided with a mounting portion for mounting the jaw bracket mounting 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 arranged at the connecting portion of the dental bracket column 10, and a vertical fastener 510 is provided in the vertical adjustment hole, the first horizontal adjustment hole is horizontally arranged at the connecting portion of the dental bracket column 10, and a first horizontal fastener 610 is provided in the first horizontal adjustment hole, and the second horizontal adjustment hole is arranged along a direction perpendicular to the second horizontal adjustment hole. The hole direction is horizontally arranged at the mounting part of the dental bracket column 10, and a second horizontal fastener 710 is arranged in the second horizontal adjustment hole. The steering adjustment hole is horizontally arranged at the mounting part of the dental bracket column 10, and the steering adjustment hole is connected with 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. When in use, the jaw support can be adjusted up and down by driving the connecting part of the dental bracket column to move up and down along the vertical adjustment hole, and the position is locked by the vertical fastener; the jaw support can be adjusted left and right by driving the connecting part of the dental bracket column to move horizontally along the first horizontal adjustment hole, and the position is locked by the first horizontal fastener; the jaw support can be adjusted front and back by driving the jaw support mounting plate to move horizontally along the second horizontal adjustment hole of the mounting part, and the position is locked by the second horizontal fastener; the jaw support can be adjusted left and right by driving the jaw support mounting plate to rotate left and right along the steering adjustment hole.

[0049] In addition, when taking a lateral view, the jaw rest needs to be removed and the lateral head clamp assembly needs to be inserted. When taking a lateral view, it is necessary to ensure that the steel ball is in the center of the ring on the image. Therefore, after the calibration of CT and panoramic images is completed, the lateral head clamp assembly needs to be adjusted. Therefore, the splint itself needs to have an adjustment function. The splint of the present 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 on the image.

[0050] Further, see Figure 3The dental support column mounting portion is provided with a steering mounting plate 110, and a horizontal mounting plate 120 is provided on the top of the steering mounting plate. The steering adjustment holes 80 are symmetrically arranged on the steering mounting plate 110 at four corners, and the second horizontal adjustment holes 70 are symmetrically arranged along two opposite sides of the horizontal mounting plate 120. When in use, the second horizontal fastener penetrates the second horizontal adjustment hole and the steering adjustment hole. In this way, the jaw support mounting plate can not only move along the second horizontal adjustment hole to achieve the horizontal (i.e., front and rear) position adjustment of the jaw support, but also make a small range of left and right rotation along the steering adjustment hole for horizontal rotation, thereby meeting the errors of structural parts processing and assembly.

[0051] Furthermore, the steering adjustment hole 80 is in an arc shape.

[0052] Reference Fig.10 , Fig.11 In some embodiments, the side head clamp assembly 40 includes a head clamp body 410, a connecting shaft 420, a clamp plate 430 and a locking assembly. The connecting shaft 420 is symmetrically arranged on both sides of the head clamp body, and the clamp plate 430 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 90 is provided on the inner wall of the clamp plate. When in use, the upper and lower positions of the clamp plate relative to the head clamp body can be adjusted through the waist-shaped hole, and can be fixed by the locking assembly after the adjustment is completed. Further, the locking assembly includes an abutment block 441, a locking column 442 and an oblique groove 443. The abutment block 441 is arranged inside the clamp plate 430, and the abutment block is located on the outer wall of the connecting shaft 420. The locking column 442 is threadedly connected to the bottom of the abutment block. The oblique groove 443 is opened on the connecting shaft The outer wall of 420 is provided with an inner inclined surface inclined inwardly from the outer wall of the connecting shaft, and the inclined groove 443 is used to drive the abutment block to move axially along the connecting shaft 420 when it contacts the locking column, so that the clamping plate abuts against the end of the connecting shaft. It should be noted that the top of the locking column is provided with a curved surface matching the inclined surface of the inclined groove. When in use, the waist-shaped hole is used to adjust the vertical position of the clamping plate relative to the head clamp body. After the clamping plate is adjusted, the locking column is rotated to rotate the locking column and the locking column is screwed into the inside of the abutment block. When the curved surface at the top of the locking column contacts the inner inclined surface of the inclined groove, the locking column is hindered by the inclined surface. As the locking column continues to be screwed in, the inner inclined surface of the inclined groove continues to hinder the locking column. The locking column is blocked 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.

[0053] The present application also provides a CBCT, which adopts the aforementioned CBCT imaging calibration method to adjust the position of the jaw rest or lateral head clamp assembly, so that when shooting CT and panoramic images, the jaw rest can be adjusted up and down, left and right, front and back, and horizontally to meet the CT and panoramic shooting requirements of different scenes; at the same time, when shooting lateral films, the jaw rest can be removed and the lateral head clamp assembly can be inserted to achieve the up and down, left and right, front and back, and horizontal rotation adjustment of the lateral head clamp to meet the lateral film shooting requirements of different scenes. In addition, the splint in the lateral head clamp assembly itself has an adjustment function, and can be adjusted up and down through the waist-shaped hole on the inner side of the splint, thereby ensuring that the position of the splint meets the shooting requirements.

[0054] The above-described embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A CBCT imaging calibration method, applied to an imaging device, characterized in that: The imaging device comprises a dental bracket column and a jaw bracket mounting plate arranged on the dental bracket column, and the CBCT imaging calibration method comprises the following steps: Controlling the dental bracket to move vertically and / or horizontally along the support, and locking the dental bracket to the support after the movement is completed; and / or The jaw support mounting plate is controlled to horizontally move along the top surface of the dental bracket column and / or to vertically rotate along the top of the dental bracket column in a direction perpendicular to the horizontal movement direction of the dental bracket column, and the jaw support mounting plate is locked to the dental bracket column after the movement is completed.

2. The CBCT imaging calibration method according to claim 1, characterized in that: Controlling the vertical movement of the bracket along the support includes the following steps: The dental bracket column moves vertically relative to the support through the vertical adjustment hole provided at its connection part, and the vertical position of the dental bracket column is locked by the vertical fastener after the movement is completed.

3. The CBCT imaging calibration method according to claim 2, characterized in that: Controlling the horizontal movement of the bracket along the support includes the following steps: The dental bracket column moves horizontally relative to the support through a first horizontal adjustment hole provided at its connecting portion, and after the movement is completed, the horizontal position of the dental bracket column is locked through a first horizontal fastener.

4. The CBCT imaging calibration method according to claim 3, characterized in that: Controlling the jaw support mounting plate to move horizontally along the top surface of the dental bracket column perpendicular to the horizontal movement direction of the dental bracket column comprises the following steps: The jaw support mounting plate moves horizontally relative to the top surface of the bracket column through the second horizontal adjustment hole provided on the bracket column mounting part, and the horizontal position of the jaw support mounting plate is locked by the second horizontal fastener after the movement is completed.

5. The CBCT imaging calibration method according to claim 4, characterized in that: Controlling the jaw support mounting plate to rotate vertically along the top of the bracket column includes the following steps: The jaw support mounting plate is vertically rotated relative to the top of the dental bracket column through the steering adjustment hole provided on the dental bracket column mounting part, and the circumferential position of the jaw support mounting plate is locked by the second horizontal fastener after the rotation is completed.

6. A CBCT imaging calibration method, applied to an imaging device, characterized in that: The imaging device comprises a dental bracket column and a jaw bracket mounting plate arranged on the dental bracket column, and the CBCT imaging calibration method comprises the following steps: Controlling the dental bracket to move vertically and / or horizontally along the support, and locking the dental bracket to the support after the movement is completed; and / or Control the jaw support mounting plate to move horizontally along the top surface of the dental bracket column perpendicular to the horizontal movement direction of the dental bracket column and / or rotate vertically along the top of the dental bracket column, and lock the jaw support mounting plate to the dental bracket column after the movement is completed; and / or The left and right clamping plates in the side head clamp assembly are controlled to move vertically relative to the head clamp body through waist-shaped holes arranged on the inner sides thereof, and the left and right clamping plates are locked on both sides of the head clamp body after the movement is completed.

7. The CBCT imaging calibration method according to claim 6, characterized in that: After the movement is completed, locking the left and right clamps on both sides of the head clamp body includes the following steps: The axial locking piece contacts the inner inclined surface of the connecting shaft at the end of the head clamp body during the process of being screwed in along the abutment block; The abutment block and the clamping plate are driven to approach the connecting shaft by the reaction force of the inner inclined surface; and Finally, the clamping plate is abutted and fixed on the end of the connecting shaft.

8. An apparatus for CBCT imaging calibration according to the CBCT imaging calibration method according to any one of claims 1 to 7, comprising an imaging device, wherein the imaging device comprises a dental bracket column (10) and a jaw bracket mounting plate (20) arranged on the dental bracket column, and further comprises a jaw bracket (30) or a lateral head clamp assembly (40) that can be used in conjunction with the jaw bracket mounting plate, characterized in that: The CBCT imaging calibration device comprises: A vertical adjustment hole (50), the vertical adjustment hole being vertically arranged at the connection portion of the dental bracket column (10), and a vertical fastener (510) being arranged in the vertical adjustment hole; A first horizontal adjustment hole (60), the first horizontal adjustment hole being horizontally arranged at the connection portion of the dental bracket column (10), and a first horizontal fastener (610) being arranged in the first horizontal adjustment hole; A second horizontal adjustment hole (70), the second horizontal adjustment hole being horizontally arranged on the mounting portion of the dental bracket column (10) in a direction perpendicular to the second horizontal adjustment hole, and a second horizontal fastener (710) being arranged in the second horizontal adjustment hole; and A steering adjustment hole (80) is horizontally arranged on the mounting portion of the dental bracket column (10), the steering adjustment hole is connected to the second horizontal adjustment hole (70), and the second horizontal fastener (710) is arranged to pass through the second horizontal adjustment hole (70) and the steering adjustment hole (80).

9. The CBCT imaging calibration device according to claim 8, characterized in that: The bracket column mounting portion is provided with a steering mounting plate (110), a horizontal mounting plate (120) is provided on the top of the steering mounting plate, the steering adjustment holes (80) are symmetrically arranged on the steering mounting plate (110) at four corners, and the second horizontal adjustment holes (70) are symmetrically arranged along two opposite sides of the horizontal mounting plate (120).

10. The CBCT imaging calibration device according to claim 9, characterized in that: The steering adjustment hole (80) is in an arc shape.

11. The CBCT imaging calibration device according to claim 9, characterized in that: The side head clamp assembly (40) comprises a head clamp body (410), connecting shafts (420) arranged on both sides of the head clamp body, a clamping plate (430) sleeved on the outer wall of the connecting shaft, and a locking assembly for locking the clamping plate to the outer wall of the connecting shaft.

12. The CBCT imaging calibration device according to claim 11, characterized in that: The locking assembly comprises an abutment block (441) arranged inside the clamping plate (430) and located on the outer wall of the connecting shaft (420), a locking column (442) threadedly connected to the bottom of the abutment block, and an oblique groove (443) formed on the outer wall of the connecting shaft (420) and used to drive the abutment block to move axially along the connecting shaft (420).

13. A CBCT, characterized in that: The position of the jaw support or lateral head clamp assembly is adjusted by using the CBCT imaging calibration method described in any one of claims 1 to 7.

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