Patient positioning device and extraoral imaging CBCT device

Abstract

The application provides a patient positioning device and an external imaging oral CBCT equipment, the positioning device comprises a support, a transverse telescopic rod, an adapter plate, a longitudinal guide rail, a bracket, a bite support, a jaw holder, a sliding block, a forehead pillow and two side clamps; wherein the support is connected with the adapter plate through the transverse telescopic rod, the bracket is connected with the adapter plate through the longitudinal guide rail, the bracket is provided with the bite support and the jaw holder, the distance between the bite support and the longitudinal guide rail is smaller than the distance between the jaw holder and the longitudinal guide rail; the sliding block is arranged on the longitudinal guide rail, the forehead pillow is arranged on the side away from the front side of the longitudinal guide rail, and the left and right two sides of the sliding block are correspondingly provided with the two side clamps. The patient positioning device and the external imaging oral CBCT equipment provided by the application can solve the positioning failure risk problem existing in the existing external imaging oral CBCT equipment.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to a patient positioning device and an external imaging oral CBCT device. Background Technology

[0002] Cone beam CT (CBCT) technology is currently the most widely used cone-beam CT in China. Its main working principle is as follows: an X-ray generator performs a circular DR (digital radiography) around the subject using a relatively low radiation dose (typically around 10 mA tube current). Then, the data obtained from the "intersection" of multiple digital radiographs around the subject (180 to 360 times, depending on the product) are reconstructed in a computer to obtain a three-dimensional image.

[0003] A typical external imaging CBCT dental scanner includes an X-ray source, a detector, and a gantry to support them. During a scan, the X-ray source and detector are mounted on a rotating arm and rotate synchronously around the patient located between them. By detecting the radiation values ​​at different angles of the detector, the patient image is calculated and reconstructed. The scan time varies from a few seconds to tens of seconds.

[0004] However, a major problem faced by all of the above devices is that the patient's head needs to remain still in order to ensure image quality, especially when taking panoramic radiographs, which requires different patients to maintain the same occlusal focus (fixed position of the central incisors).

[0005] To solve the above problems, a patient positioning device is generally required.

[0006] US Patent 9642582B2 discloses a patient positioning device. The device is suspended on a gantry and positioned between the X-ray source and the detector. The device employs a transparent, curved mask structure and includes a frontal bolster, jaw rest, occlusal support, and handle. However, while the height of the occlusal support is adjustable, the height of the jaw rest is not. This results in variations in the imaging focus during scanning for patients with different head sizes (individual differences in the height of the central incisors and the base of the mandible), increasing the difficulty of subsequent algorithms. Furthermore, since it only has a frontal bolster that can be adjusted vertically and horizontally, the patient's head can still sway left and right and tilt backward, posing a significant risk of positioning failure. Summary of the Invention

[0007] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a patient positioning device and an external imaging oral CBCT device to solve the problem of positioning failure risk in existing external imaging oral CBCT devices.

[0008] To achieve the above and other related objectives, the present invention provides a patient positioning device, which includes at least: a support, a transverse telescopic rod, an adapter plate, a longitudinal guide rail, a bracket, an occlusal support, a jaw rest, a slider, a frontal bolster, and two side clamps; wherein,

[0009] The support is connected to the adapter plate via the lateral telescopic rod, and the lateral distance between the adapter plate and the support is adjusted by adjusting the length of the lateral telescopic rod.

[0010] The bracket is connected to the adapter plate via the longitudinal guide rail, and the bracket is located below the support. The bracket has the occlusal bracket and the jaw support on its upper side facing the support. The distance between the occlusal bracket and the longitudinal guide rail is smaller than the distance between the jaw support and the longitudinal guide rail. The jaw support can be adjusted in height by moving up and down.

[0011] The slider is mounted on the longitudinal guide rail and its longitudinal distance from the bracket is adjusted by sliding up and down. The front side of the slider away from the longitudinal guide rail is provided with the forehead pillow. Two side clamps are provided on the left and right sides of the slider respectively. The clamping position of the side clamps is adjusted by adjusting the rotation angle.

[0012] Optionally, the support is provided with a transverse hole, and the transverse telescopic rod achieves its telescopic function by adjusting its depth in the transverse hole.

[0013] Optionally, the occlusal bracket is detachably connected to the support bracket.

[0014] Optionally, the longitudinal guide rail is made of carbon fiber tubing.

[0015] Optionally, the patient positioning device further includes: a front pillow movement adjustment mechanism, one end of which is disposed outside the slider and the other end of which is disposed in the slider and connected to the front pillow, wherein the front pillow adjusts its lateral distance with the occlusal bracket through the front pillow movement adjustment mechanism.

[0016] Optionally, the forehead pillow adjustment mechanism includes at least a guide groove, a screw, a clamping ring, an adjustment knob, and a set screw; wherein,

[0017] The guide groove opens at the front side of the slider and extends into the slider; the screw passes through the slider at the rear side of the slider near the longitudinal guide rail and extends into the guide groove, and is fixed to the slider by the clamping ring; the adjusting knob is fixed to the end of the screw located outside the slider by the set screw; at this time, the forehead pillow is fixed to the screw by thread engagement and protrudes from the front side of the slider.

[0018] Optionally, the patient positioning device further includes: a side clamp rotation adjustment mechanism, disposed in the slider, connecting the side clamp to the slider, and used to adjust the rotation position of the side clamp.

[0019] Optionally, the side clamp rotation adjustment mechanism includes at least a ratchet, a pawl, a first pin, a second pin, a spring, and a lever; wherein,

[0020] The ratchet is fixed to the slider, and the side clamp is rotatably connected to the ratchet via the first pin.

[0021] The pawl is rotatably connected to the side clamp via the second pin. The teeth at its front end mesh with the teeth of the ratchet. The back of the teeth at its front end is connected to the side clamp via a compression spring. Its rear end contacts the paddle. The paddle is slidably mounted on the side clamp. The paddle has a peak segment and a valley segment.

[0022] Optionally, the bracket is provided with a handle on its rear side near the longitudinal guide rail.

[0023] The present invention also provides an external imaging oral CBCT device, the external imaging oral CBCT device comprising at least the patient positioning device as described in any of the preceding claims.

[0024] Optionally, the external imaging oral CBCT device further includes a rotating arm and a gantry;

[0025] A connecting shaft is fixedly installed above the support, and the support is connected to the frame through the connecting shaft;

[0026] The slewing boom is hoisted and installed below the frame. It has a bridging boom and two support booms, with the two support booms vertically downward at both ends of the bridging boom.

[0027] One arm is equipped with an X-ray source, the other arm is equipped with a detector, and the rotation axis of the rotary arm overlaps with the central axis of the connecting shaft.

[0028] Optionally, the frame is further provided with a rotating structure to drive the connecting shaft to rotate.

[0029] As described above, the patient positioning device and external imaging oral CBCT equipment of the present invention have the following beneficial effects:

[0030] 1. By setting an immovable occlusal support and using an adjustable jaw support, the position of the central incisor positioning point is fixed and accurately positioned.

[0031] 2. The central axis of the connecting shaft overlaps with the rotation axis of the rotary arm, achieving coaxial positioning and reducing the positioning error between the two.

[0032] 3. By setting the side clip, the stability of the patient's head positioning is improved. Attached Figure Description

[0033] Figure 1 The diagram shown is a structural schematic of the patient positioning device described in this invention.

[0034] Figure 2 The diagram shows the lateral adjustment of the patient positioning device according to the present invention.

[0035] Figure 3 This is a schematic diagram showing the longitudinal adjustment position of the jaw support as described in this invention.

[0036] Figure 4 The diagram shown illustrates the longitudinal adjustment position of the slider as described in this invention.

[0037] Figure 5 The diagram shown is a schematic representation of the forehead pillow movement adjustment mechanism described in an embodiment of the present invention.

[0038] Figure 6 The diagram shown illustrates the side clamp adjustment angle as described in this invention.

[0039] Figure 7 The diagram shown is a structural schematic of the side clamp rotation adjustment mechanism described in an embodiment of the present invention.

[0040] Figure 8 The diagram shown is a structural schematic of the external imaging oral CBCT device described in this invention.

[0041] Component designation explanation

[0042] 1. External Imaging Dental CBCT Equipment

[0043] 20-inch rotary boom

[0044] 21 X-ray sources

[0045] 22 detectors

[0046] 30 racks

[0047] 10 Patient positioning device

[0048] 100 supports

[0049] 200 Horizontal Telescopic Bar

[0050] 300 adapter board

[0051] 400 longitudinal guide rail

[0052] 500 brackets

[0053] 510 Occlusal Frame

[0054] 520 jaw support

[0055] 530 Controller

[0056] 600 slider

[0057] 610 Forehead Pillow

[0058] 620 side clip

[0059] 630 Forehead Pillow Adjustment Mechanism

[0060] 631 Guide groove

[0061] 632 Screw

[0062] 633 Clamping Ring

[0063] 634 Adjustment knob

[0064] 635 set screw

[0065] 640 Side clamp rotation adjustment mechanism

[0066] 641 Ratchet

[0067] 642 Razor Claw

[0068] 643 First Pin

[0069] 644 Second Pin

[0070] 645 Spring

[0071] 646 Paddle Detailed Implementation

[0072] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0073] Please see Figures 1 to 8 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0074] like Figure 1 As shown, this embodiment provides a patient positioning device 10, which includes at least: a support 100, a transverse telescopic rod 200, an adapter plate 300, a longitudinal guide rail 400, a bracket 500, an occlusal bracket 510, a jaw support 520, a slider 600, a frontal pillow 610, and two side clips 620.

[0075] The support 100 is connected to the adapter plate 300 via the lateral telescopic rod 200, and the lateral distance between the adapter plate 300 and the support 100 can be adjusted by adjusting the length of the telescopic rod 200.

[0076] In this embodiment, with the position of the support 100 as the base point, the lateral spacing between the adapter plate 300 and the support 100 is adjustable, while the longitudinal spacing is not adjustable. Furthermore, the lateral spacing is adjustable by the extension and retraction of the lateral telescopic rod 200. It should be noted that the lateral telescopic rod 200 can also be replaced by a sliding rod or other structures, as long as the lateral spacing adjustment function can be met.

[0077] Specifically, such as Figure 2 As shown, the support 100 is provided with a transverse hole, and the transverse telescopic rod 200 achieves its telescopic function by adjusting its depth in the transverse hole.

[0078] In this embodiment, the transverse telescopic rod 200 is a round shaft of fixed length, one end of which is fixed to the side of the adapter plate 300, and the other end extends into the transverse hole in the support 100. The transverse spacing is adjusted by adjusting the depth of the round shaft extending into the transverse hole.

[0079] The bracket 500 is connected to the adapter plate 300 via the longitudinal guide rail 400, and the bracket 500 is located below the support 100.

[0080] In this embodiment, the two ends of the longitudinal guide rail 400 are a bracket 500 and an adapter plate 300, respectively. Furthermore, the longitudinal distance between the bracket 500 and the adapter plate 300 is not adjustable, that is, the longitudinal distance between the bracket 500 and the support 100 is not adjustable.

[0081] Specifically, the longitudinal guide rail 400 is made of carbon fiber tubing.

[0082] In this embodiment, the longitudinal guide rail 400 is made of carbon fiber tubing, which can improve structural rigidity while reducing processing difficulty and the difficulty of artifact removal after imaging by external imaging dental CBCT equipment. It should be noted that in this embodiment, the support 100, the transverse telescopic rod 200, the adapter plate 300, the bracket 500, and the slider 600 can also be made of carbon fiber.

[0083] Specifically, the bracket 500 is provided with the occlusal bracket 510 and the jaw support 520 on the upper side facing the support 100. The distance between the occlusal bracket 510 and the longitudinal guide rail 400 is smaller than the distance between the jaw support 520 and the longitudinal guide rail 400. The jaw support 520 can be adjusted in height by moving up and down.

[0084] In this embodiment, as Figure 3 As shown, the occlusal bracket 510 fixedly mounted on the upper side of the bracket 500 is used for patient positioning. When the patient bites the occlusal bracket 510, since the height of the occlusal bracket 510 is not adjustable, while the height of the jaw rest 520 is adjustable, even if the patient's height and head size (the distance between the central incisors and mandible varies in different head sizes) change, only the height of the jaw rest needs to be adjusted to stabilize the patient's head, eliminating the need to adjust the height of the occlusal bracket 510. Therefore, the occlusal focus (fixed position of the central incisors) remains fixed for different patients. The occlusal bracket 510 and jaw rest 520 mounted on the bracket 500 can accommodate patients of different head sizes and ensure positioning stability. Furthermore, to achieve the function of adjusting the height of the jaw rest 520, the jaw rest can employ a lifting bracket, lifting rod, or other structures to achieve height adjustment.

[0085] More specifically, the occlusal bracket 510 is detachably connected to the bracket 500.

[0086] In this embodiment, the occlusal bracket 510 can be disassembled and replaced, and cleaned regularly to prevent bacterial infection.

[0087] Specifically, a handle 530 is provided on the rear side of the bracket 500 near the longitudinal guide rail 400.

[0088] In this embodiment, as Figure 1 As shown, there is a pair of handles 530 arranged in a mirror image, used to place the patient's arm for easy support and further improve the stability of the patient's head positioning.

[0089] The slider 600 is mounted on the longitudinal guide rail 400, and its longitudinal distance from the bracket 500 can be adjusted by sliding it up and down.

[0090] In this embodiment, as Figure 4 As shown, the slider 600 is mounted on the longitudinal guide rail 400, and its longitudinal distance from the bracket 500 is adjustable, but its lateral distance is not adjustable.

[0091] Specifically, the front side of the slider 600 away from the longitudinal guide rail 400 is provided with the forehead pillow 610, and the left and right sides of the slider 600 are respectively provided with two side clamps 620, and the clamping position of the side clamps 620 can be adjusted by adjusting the rotation angle.

[0092] In this embodiment, the forehead pillow 610 can be adjusted both longitudinally and laterally relative to the occlusal bracket 510 to accommodate different head circumferences of patients; the side clip 620 can be adjusted longitudinally relative to the occlusal bracket 510, and its angle can be adjusted to accommodate different head circumferences of patients, serving as a support structure to stabilize the patient's head and further improve the stability of the patient's head positioning.

[0093] Specifically, the patient positioning device 10 further includes a front pillow movement adjustment mechanism 630, one end of which is disposed outside the slider 600, and the other end is disposed in the slider 600 and connected to the front pillow 610. The front pillow 610 adjusts its lateral distance with the occlusal bracket 510 through the front pillow movement adjustment mechanism 630.

[0094] In this embodiment, the forehead pillow movement adjustment mechanism 630 connects the slider 600 to the forehead pillow 610 and adjusts the lateral position of the forehead pillow 610. As an example, such as... Figure 5 As shown, the forehead pillow moving adjustment mechanism 630 includes at least a guide groove 631, a screw 632, a clamping ring 633, an adjusting knob 634, and a set screw 635; wherein,

[0095] A guide groove 631 opens at the front side of the slider 600 and extends into the slider 600; a screw 632 passes through the slider 600 near the rear side of the slider 600 close to the longitudinal guide rail 400 and extends into the guide groove 631, and is fixed to the slider 600 by a clamping ring 633; ​​an adjusting knob 634 is fixed to the end of the screw 632 located outside the slider 600 by a set screw 635; at this time, the forehead pillow 610 is fixed to the screw 632 by thread engagement and protrudes from the front side of the slider 600. The set screw 635 securely connects the adjusting knob 634 and the screw 632. Rotating the adjusting knob 634 can drive the screw 632 to rotate. Since the position of the screw 632 relative to the slider 600 is constrained by the clamping ring 633, the rotation of the screw 632 will push the forehead pillow 610 to move longitudinally.

[0096] It should be noted that in this embodiment, the height adjustment of the jaw support 520 by moving up and down, the height adjustment of the slider 600 by moving up and down, and the spacing adjustment of the adapter plate 300 by moving laterally can also be achieved by using a structure such as the side clamp rotation adjustment mechanism 640.

[0097] Specifically, the patient positioning device 10 further includes a side clamp rotation adjustment mechanism 640, which is disposed in the slider 600, connects the side clamp 620 to the slider 600, and is used to adjust the rotation position of the side clamp 620.

[0098] In this embodiment, as Figure 6 and Figure 7As shown, the side clamp rotation adjustment mechanism 640 connects the side clamp 620 to the slider 600 and controls the rotation position of the side clamp 620. As an example, as... Figure 7 As shown, the side clamp rotation adjustment mechanism 640 includes at least a ratchet 641, a pawl 642, a first pin 643, a second pin 644, a spring 645, and a paddle 646; wherein,

[0099] Ratchet 641 is fixed to slider 600 (ratchet 641 cannot rotate), side clamp 620 is rotatably connected to ratchet 641 via first pin 643 (because ratchet 641 and first pin 643 are coaxial, they can be considered as side clamp 620 rotating around ratchet 641); pawl 642 is rotatably connected to side clamp 620 via second pin 644, the front teeth of pawl 642 mesh with the teeth of ratchet 641, the back of the front teeth of pawl 642 is connected to side clamp 620 via compression spring 645, and its rear end contacts paddle 646, which is slidably mounted on side clamp 620; paddle 646 is provided with peak and valley segments. When the peak of the sliding paddle 646 contacts the pawl 642, the pawl 642 overcomes the pressure of the spring 645 and rotates counterclockwise around the second pin 644 by a certain angle. The ratchet 641 disengages from the pawl 642, and the side clamp 620 can rotate freely around the first pin 643. When the valley of the sliding paddle 646 contacts the pawl 642, the pawl 642 rotates clockwise around the second pin 644 by the spring pressure. The ratchet 641 engages with the pawl 642, and the side clamp 620 is driven by lateral force to rotate only counterclockwise around the first pin 643.

[0100] Accordingly, this embodiment also provides an external imaging oral CBCT device 1, which includes at least the patient positioning device 10 as described above. Furthermore, it also includes a rotating arm 20 and a gantry 30.

[0101] In this embodiment, when the device is in operation, the rotary arm 20 rotates around the patient positioning device 10 and uses the central incisor that bites on the occlusal bracket 510 as the positioning reference point for scanning imaging.

[0102] Specifically, such as Figure 1 and Figure 8 As shown, a connecting shaft 110 is fixedly installed above the support 100 inside the patient positioning device 10, and the support 100 is connected to the frame 30 through the connecting shaft 110; the rotating arm 20 is suspended below the frame 30, and has a bridging arm and two supporting arms. The two supporting arms are vertically downward at both ends of the bridging arm, and one of the supporting arms is equipped with an X-ray source 21, and the other supporting arm is equipped with a detector 22.

[0103] In this embodiment, as Figure 8As shown, the connecting shaft 110 and the support 100 are an integral structure. The connecting shaft 110 is connected to the frame 30, and the patient positioning device 10 is suspended in the frame 30. Furthermore, the connecting shaft 110 is rotatable, that is, the patient positioning device 10 can rotate within the frame 30. The other components in the patient positioning device 10, except for the support 100, can be adjusted laterally relative to the support 100 to facilitate patient entry and exit.

[0104] More specifically, the rotation axis of the rotary arm 20 overlaps with the central axis of the connecting shaft 110.

[0105] In this embodiment, the rotary arm 20 rotates about the central axis of the connecting shaft 110, and the patient positioning device 10 also rotates about the central axis of the connecting shaft 110. The rotation axis of the rotary arm 20 and the rotation axis of the patient positioning device 10 are coaxially arranged, which can effectively reduce the number and length of the dimensional chains in the equipment, reduce the manufacturing difficulty, and the positioning base points of the two are on the same axis after being coaxially arranged, which can improve the positioning accuracy.

[0106] In summary, the patient positioning device and external imaging oral CBCT equipment provided by this invention, through the setting of an immovable occlusal support and the use of an adjustable chin rest, ensure that the position of the central incisor positioning point remains fixed and accurate; the side clamp improves the stability of patient head positioning; and the central axis of the connecting shaft overlaps with the rotation axis of the rotating arm, achieving coaxial positioning, reducing positioning errors between the two, and lowering the positioning difficulty. Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0107] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A patient positioning device, characterized in that, The patient positioning device includes at least: a support, a transverse telescopic rod, an adapter plate, a longitudinal guide rail, a bracket, an occlusal support, a jaw rest, a slider, a frontal bolster, and two side clips; wherein... The support is connected to the adapter plate via the lateral telescopic rod, and the lateral distance between the adapter plate and the support is adjusted by adjusting the length of the lateral telescopic rod. The bracket is connected to the adapter plate via the longitudinal guide rail, and the bracket is located below the support. The bracket has the occlusal bracket and the jaw support on its upper side facing the support. The distance between the occlusal bracket and the longitudinal guide rail is smaller than the distance between the jaw support and the longitudinal guide rail. The jaw support can be adjusted in height by moving up and down. The slider is mounted on the longitudinal guide rail and its longitudinal distance from the bracket is adjusted by sliding up and down. The front side of the slider away from the longitudinal guide rail is provided with the forehead pillow. Two side clamps are provided on the left and right sides of the slider respectively. The clamping position of the side clamps is adjusted by adjusting the rotation angle. The support is provided with a transverse hole, and the transverse telescopic rod achieves its telescopic function by adjusting its depth in the transverse hole; The bite support and the bracket are detachably connected; the height of the bite support is not adjustable. By setting up an immovable occlusal support and using an adjustable jaw bracket, the position of the occlusal focus, i.e. the central incisor positioning point, remains fixed for different patients, ensuring precise and stable positioning.

2. The patient positioning device according to claim 1, characterized in that, The longitudinal guide rail is made of carbon fiber tubing.

3. The patient positioning device according to claim 1, characterized in that, The patient positioning device further includes a front pillow movement adjustment mechanism, one end of which is disposed outside the slider and the other end of which is disposed in the slider and connected to the front pillow. The front pillow adjusts its lateral distance from the occlusal bracket through the front pillow movement adjustment mechanism.

4. The patient positioning device according to claim 3, characterized in that, The forehead pillow adjustment mechanism includes at least a guide groove, a screw, a clamping ring, an adjustment knob, and a set screw; wherein... The guide groove opens at the front side of the slider and extends into the slider; the screw passes through the slider at the rear side of the slider near the longitudinal guide rail and extends into the guide groove, and is fixed to the slider by the clamping ring; the adjusting knob is fixed to the end of the screw located outside the slider by the set screw; at this time, the forehead pillow is fixed to the screw by thread engagement and protrudes from the front side of the slider.

5. The patient positioning device according to claim 1, characterized in that, The patient positioning device further includes a side clamp rotation adjustment mechanism, which is disposed in the slider, connects the side clamp to the slider, and is used to adjust the rotation position of the side clamp.

6. The patient positioning device according to claim 5, characterized in that, The side clamp rotation adjustment mechanism includes at least a ratchet, a pawl, a first pin, a second pin, a spring, and a lever; wherein... The ratchet is fixed to the slider, and the side clamp is rotatably connected to the ratchet via the first pin. The pawl is rotatably connected to the side clamp via the second pin. The teeth at its front end mesh with the teeth of the ratchet. The back of the teeth at its front end is connected to the side clamp via a compression spring. Its rear end contacts the paddle. The paddle is slidably mounted on the side clamp. The paddle has a peak segment and a valley segment.

7. The patient positioning device according to claim 1, characterized in that, A handle is provided on the rear side of the bracket near the longitudinal guide rail.

8. An external imaging oral CBCT device, characterized in that, The external imaging oral CBCT device includes at least the patient positioning device as described in any one of claims 1-7.

9. The external imaging oral CBCT device according to claim 8, characterized in that, The external imaging oral CBCT equipment also includes a rotating arm and a gantry; A connecting shaft is fixedly installed above the support, and the support is connected to the frame through the connecting shaft; The slewing boom is hoisted and installed below the frame. It has a bridging boom and two support booms, with the two support booms vertically downward at both ends of the bridging boom. One arm is equipped with an X-ray source, the other arm is equipped with a detector, and the rotation axis of the rotary arm overlaps with the central axis of the connecting shaft.

10. The external imaging oral CBCT device according to claim 9, characterized in that, The frame is also equipped with a rotating structure that drives the connecting shaft to rotate.

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