阅读说明：本技术 一种高效的cbct拍摄装置及其拍摄方法 (Efficient CBCT (cone beam computed tomography) shooting device and shooting method thereof ) 是由 胡功银 何传鑫 胡剑文 蒋茂余 路宇 于 2021-09-23 设计创作，主要内容包括：本发明公开了一种高效的CBCT拍摄装置,包括水平安装板、可拆卸固定在所述水平安装板两侧的X射线发生器和X射线平板探测器。所述X射线发生器和所述X射线平板探测器在水平方向上正对设置,所述X射线发生器在所述X射线平板探测器上的投影沿所述X射线平板探测器的中轴线对称分布；所述X射线发生器和所述X射线平板探测器在竖直方向上错位设置。通过上述设置方式,设备只需转动小于等于200°即可完成全对视野尺寸直径大于等于60mm的被扫描体的周向拍摄,降低患者拍摄的扫描时间,降低了患者吸收辐射剂量,提高了设备的使用效率。(The invention discloses a high-efficiency CBCT shooting device, which comprises a horizontal mounting plate, an X-ray generator and an X-ray flat panel detector, wherein the X-ray generator and the X-ray flat panel detector are detachably fixed on two sides of the horizontal mounting plate. The X-ray generator and the X-ray flat panel detector are arranged oppositely in the horizontal direction, and the projections of the X-ray generator on the X-ray flat panel detector are symmetrically distributed along the central axis of the X-ray flat panel detector; the X-ray generator and the X-ray flat panel detector are arranged in a staggered mode in the vertical direction. Through the arrangement mode, the equipment can complete circumferential shooting of the scanned body with the visual field size diameter being more than or equal to 60mm only by rotating by less than or equal to 200 degrees, the scanning time of shooting by a patient is reduced, the radiation dose absorbed by the patient is reduced, and the use efficiency of the equipment is improved.)

1. A high-efficiency CBCT shooting device is characterized by comprising a horizontal mounting plate, an X-ray generator and an X-ray flat panel detector, wherein the X-ray generator and the X-ray flat panel detector are detachably fixed on two sides of the horizontal mounting plate;

the X-ray generator and the X-ray flat panel detector are arranged oppositely in the horizontal direction, and the projections of the X-ray generator on the X-ray flat panel detector are symmetrically distributed along the central axis of the X-ray flat panel detector; the X-ray generator and the X-ray flat panel detector are arranged in a staggered mode in the vertical direction.

2. The efficient CBCT photographing device as recited in claim 1, wherein a first mounting bracket for mounting an X-ray generator is disposed on one side of the horizontal mounting plate, a second mounting bracket for mounting the X-ray flat panel detector is disposed on the other side of the horizontal mounting plate, and the first mounting bracket and the second mounting bracket are detachably fixed with the horizontal mounting plate.

3. A high-efficiency CBCT photographing apparatus according to claim 1, wherein the top of the horizontal mounting plate is provided with a mounting hole for fixing with the rotation driving device.

4. A high efficiency CBCT imaging method according to any of claims 1-3, comprising the steps of:

a1, placing the scanned body between the X-ray generator and the X-ray flat panel detector;

a2, starting the X-ray generator and the X-ray flat panel detector;

a3, driving the horizontal mounting plate to rotate at a constant speed by using the rotary driving device to drive the horizontal mounting plate to rotate around the mounting hole, wherein the rotation angle of the horizontal mounting plate is less than or equal to 200 degrees.

5. The efficient CBCT photography method as claimed in claim 4, wherein the rotation angle of the horizontal mounting plate is 180-200 °.

6. An efficient CBCT photography method as recited in claim 4, wherein the scan time of the X-ray generator is less than 12s, and the diameter of the field of view size of the scanned object is greater than or equal to 60 mm.

Technical Field

The invention relates to the technical field of medical treatment and oral medicine, in particular to a high-efficiency CBCT (cone beam computed tomography) shooting device and a shooting method thereof.

Background

The oral cavity CT equipment is an oral cavity X-ray imaging system, an X-ray generator 4 and a detector of the oral cavity CT equipment are suspended at two sides of a rotary driving device, the rotary driving device rotates around the skull of a patient to carry out scanning imaging, three-dimensional images of the oral cavity jaw face of the patient can be provided, and the oral cavity CT equipment is widely applied to various departments of the oral cavity such as tooth implantation diagnosis, preoperative examination of oral surgery, orthodontic scheme design and the like. The main working principle is as follows: free charges generated by a high voltage generator in the X-ray tube assembly bombard a cathode of the X-ray tube to generate action with an anode target to emit X-rays, the X-rays are irradiated to the irradiation body in a 360-degree annular digital mode through a rotating arm, and a multi-angle projection image of the X-rays penetrating through the irradiation body is obtained through an image plate. The data obtained in the "intersection" after the multiple digital irradiations around the irradiation object are then input to a computer for image reconstruction, thereby generating a multi-slice tomographic image of the irradiation object. And finally, reconstructing the tomograms into a three-dimensional image through software processing.

In the prior art, due to the size limitation of a detector for receiving an X-ray signal (the increase of the size of the detector greatly increases technical difficulty and cost), in order to obtain a complete CT image, the installation position of the detector needs to be staggered for a certain distance in the horizontal direction so as to obtain a larger visual field, and the detector rotates 360 degrees around the skull of a patient and continuously emits X-rays. The 360 deg. rotation of the device for imaging not only results in a longer imaging time but also increases the radiation dose absorbed by the patient.

Disclosure of Invention

The present invention is directed to a CBCT imaging apparatus with high efficiency, which solves the above problems in the prior art.

The invention discloses a high-efficiency CBCT shooting device, which comprises a horizontal mounting plate, an X-ray generator and an X-ray flat panel detector, wherein the X-ray generator and the X-ray flat panel detector are detachably fixed on two sides of the horizontal mounting plate;

the X-ray generator and the X-ray flat panel detector are arranged oppositely in the horizontal direction, and the projections of the X-ray generator on the X-ray flat panel detector are symmetrically distributed along the central axis of the X-ray flat panel detector; the X-ray generator and the X-ray flat panel detector are arranged in a staggered mode in the vertical direction.

In a preferred embodiment, a first mounting bracket for mounting an X-ray generator is arranged on one side of the horizontal mounting plate, a second mounting bracket for mounting the X-ray flat panel detector is arranged on the other side of the horizontal mounting plate, and the first mounting bracket and the second mounting bracket are both detachably fixed with the horizontal mounting plate.

In a preferred embodiment, the top of the horizontal mounting plate is provided with a mounting hole for fixing with a rotary driving device.

An efficient CBCT shooting method comprises the following steps:

a1, placing the scanned body between the X-ray generator and the X-ray flat panel detector;

a2, starting the X-ray generator and the X-ray flat panel detector;

a3, driving the horizontal mounting plate to rotate at a constant speed by using the rotary driving device to drive the horizontal mounting plate to rotate around the mounting hole, wherein the rotation angle of the horizontal mounting plate is less than or equal to 200 degrees.

In a preferred embodiment, the rotation angle of the horizontal mounting plate is 180-200 °.

In a preferred embodiment, the scanning time of the X-ray generator is less than 12s, and the diameter of the field of view size of the scanned object is greater than or equal to 60 mm.

The technical scheme of the invention has the beneficial effects that:

the X-ray generator and the X-ray flat panel detector are arranged in a manner of being opposite to each other in the horizontal direction and staggered in the vertical direction. Through the arrangement mode, the equipment can complete circumferential shooting of the scanned body with the visual field size diameter being more than or equal to 60mm only by rotating by less than or equal to 200 degrees, the scanning time of shooting by a patient is reduced, the radiation dose absorbed by the patient is reduced, and the use efficiency of the equipment is improved.

Drawings

FIG. 1 is a top view of a CBCT camera for oral cavity,

figure 2 is a schematic view of the overall structure of the present invention,

FIG. 3 is a top view of the scanned object of the present invention,

figure 4 is a side view of a scanned object photographed according to the present invention,

figure 5 is a view of the horizontal mounting plate of the present invention rotated 180 deg. for a shooting range,

fig. 6 is a view of the photographing range of the horizontal mounting plate rotated by 200 deg. according to the present invention.

Description of reference numerals: the X-ray scanning device comprises a horizontal mounting plate 1, a mounting hole 2, a first mounting bracket 3, a 4X-ray generator, a second mounting bracket 5, an X-ray flat panel detector 6 and a scanned body 7.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

As shown in fig. 1, in the prior art, in order to obtain a large field of view, the X-ray generator 4 and the X-ray flat panel detector 6 are horizontally offset by a certain distance, and during scanning and shooting, the shooting device needs to rotate 360 ° around the skull of the patient and continuously emit X-rays. Not only does it lengthen the imaging time, but it also increases the amount of radiation absorbed by the patient.

As shown in fig. 2, the technical solution of the present invention discloses an efficient CBCT photographing apparatus, which can realize one-circle photographing through a small number of rotation angles, thereby reducing the radiation dose to the patient. The device comprises a horizontal mounting plate 1, an X-ray generator 4 and an X-ray flat panel detector 6 which are detachably fixed on two sides of the horizontal mounting plate 1, wherein the X-ray generator 4 and the X-ray flat panel detector 6 are respectively used for generating and receiving X-rays.

A first mounting bracket 3 used for mounting an X-ray generator 4 is arranged on one side of the horizontal mounting plate 1, a second mounting bracket 5 used for mounting an X-ray flat panel detector 6 is arranged on the other side of the horizontal mounting plate, and the first mounting bracket 3 and the second mounting bracket 5 are both detachably fixed with the horizontal mounting plate 1. The first mounting bracket 3 and the second mounting bracket 5 are used for detachably fixing the X-ray generator 4 and the X-ray flat panel detector 6 on the horizontal mounting plate 1.

The top of the horizontal mounting plate 1 is provided with a mounting hole 2 for fixing with a rotary driving device. The horizontal mounting plate 1 is fixed with the rotation driving device through the mounting hole 2, and when the rotation driving is performed, the horizontal mounting plate 1 drives the X-ray generator 4 and the X-ray flat panel detector 6 to rotate around the mounting hole 2 (the rotation driving device is a scheme which can be realized by the prior art).

As shown in fig. 3, the X-ray generator 4 and the X-ray flat panel detector 6 are disposed opposite to each other in the horizontal direction, and the projections of the X-ray generator 4 on the X-ray flat panel detector 6 are symmetrically distributed along the central axis of the X-ray flat panel detector 6. As shown in fig. 4, the X-ray generator 4 and the X-ray flat panel detector 6 are arranged offset in the vertical direction.

A high-efficiency CBCT shooting method comprises the following steps of A1, placing a scanned object 7 between an X-ray generator 4 and an X-ray flat panel detector 6; a2, starting the X-ray generator 4 and the X-ray flat panel detector 6; a3, the horizontal mounting plate 1 is driven by the rotary driving device to rotate at a constant speed by taking the mounting hole 2 as the center, and the rotation angle of the horizontal mounting plate 1 is less than or equal to 200 degrees.

The preferred rotation angle of the horizontal mounting plate 1 is 180-200 deg.. Fig. 5 and 6 are shooting regions of the horizontal mounting plate 1 rotated by 180 ° and 200 °, respectively, in which the field of view size of the scanned body 7 disposed therein is 60mm in diameter. As can be seen from fig. 5, the horizontal mounting plate 1 rotates 180 ° to complete the omnidirectional imaging of the object 7 to be scanned.

By adopting the shooting method, the rotation angle of the equipment is reduced, and meanwhile, the X-ray generator 4 can complete one-circle shooting of the scanned body 7 with the visual field size and the diameter being more than or equal to 60mm under the condition that the scanning time is less than 12s, so that the radiation dose absorbed by a patient is reduced, and the use efficiency of the equipment is improved.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.