阅读说明：本技术 一种法线重合配准系统 (Normal coincidence registration system ) 是由 张峰峰 钟恺 于 2020-06-30 设计创作，主要内容包括：本发明公开了一种法线重合配准系统,该系统包括X光机、相机、标定靶、第一调节模块和第二调节模块,标定靶置于X光机的成像板上,第一调节模块用于调节标定靶使得标定靶对准X光机的成像法线,第二调节模块用于在标定靶对准X光机的成像法线后,调节相机使得标定靶对准相机的成像法线。本发明的法线重合配准系统通过设置标定靶、第一调节模块和第二调节模块,通过第一调节模块调节标定靶使得标定靶对准X光机的成像法线,再通过第二调节模块调节相机使得标定靶对准相机的成像法线,即完成了X光机和相机的法线重合配准,配准精度高,简单可行,提高手术导航的精确性,降低手术的风险性。(The invention discloses a normal line superposition and registration system which comprises an X-ray machine, a camera, a calibration target, a first adjusting module and a second adjusting module, wherein the calibration target is arranged on an imaging plate of the X-ray machine, the first adjusting module is used for adjusting the calibration target to enable the calibration target to be aligned with an imaging normal line of the X-ray machine, and the second adjusting module is used for adjusting the camera to enable the calibration target to be aligned with the imaging normal line of the camera after the calibration target is aligned with the imaging normal line of the X-ray machine. The normal line superposition registration system is provided with the calibration target, the first adjusting module and the second adjusting module, the calibration target is adjusted through the first adjusting module to enable the calibration target to be aligned with the imaging normal line of the X-ray machine, the camera is adjusted through the second adjusting module to enable the calibration target to be aligned with the imaging normal line of the camera, namely the normal line superposition registration of the X-ray machine and the camera is completed, the registration precision is high, the operation navigation precision is improved, and the operation risk is reduced.)

1. A normal registration system is characterized by comprising an X-ray machine, a camera, a calibration target, a first adjusting module and a second adjusting module, wherein the calibration target is arranged on an imaging plate of the X-ray machine, the first adjusting module is used for adjusting the calibration target to enable the calibration target to be aligned with an imaging normal of the X-ray machine, and the second adjusting module is used for adjusting the camera to enable the calibration target to be aligned with the imaging normal of the camera after the calibration target is aligned with the imaging normal of the X-ray machine.

2. The normal registration system of claim 1, wherein the calibration target comprises two horizontal arms and a vertical arm, the two horizontal arms are arranged in a cross manner, the bottom of the vertical arm is arranged at the intersection point of the two horizontal arms and is perpendicular to the plane of the two horizontal arms, the top of the vertical arm is provided with a main marker ball, and the two ends of the two horizontal arms are provided with auxiliary marker balls.

3. The normal registration system of claim 2, wherein the vertical arm and one horizontal arm are integrally formed, and the other horizontal arm comprises two mounting arms symmetrically mounted on both sides of the vertical arm.

4. The normal registration system of claim 3, wherein the two mounting arms are bolted to the vertical arm.

5. The normal registration system of claim 2, wherein the primary marker balls are located at an intersection of two opposite secondary marker ball lines in an image taken by the X-ray machine or camera when the calibration target is aligned with an imaging normal of the X-ray machine or camera.

6. The normal registration system of claim 2, wherein the primary marker ball and the secondary marker ball are bolted to the vertical arm and the horizontal arm, respectively.

7. The normal registration system of claim 2, wherein the primary marker ball and the secondary marker ball each have a reflective coating thereon.

8. The normal registration system of claim 1, further comprising a third adjustment module configured to coarsely adjust the calibration target based on a laser cross of the X-ray machine.

9. The normal registration system of claim 1, wherein the first adjustment module is configured to adjust the calibration target such that the calibration target is aligned with an imaging normal of the X-ray machine, and specifically comprises: the first adjusting module is used for adjusting the calibration target according to the image shot by the X-ray machine so that the calibration target is aligned to the imaging normal of the X-ray machine.

10. The normal registration system of claim 1, wherein the adjusting the camera such that the calibration target is aligned with an imaging normal of the camera, specifically comprises: and adjusting the camera according to the image shot by the camera so that the calibration target is aligned with the imaging normal of the camera.

Technical Field

The invention relates to the technical field of surgical navigation, in particular to a normal line coincidence registration system.

Background

The operation navigation system accurately corresponds the preoperative or intraoperative image data of a patient to the anatomical structure of the patient on an operation bed, tracks the surgical instrument during the operation and updates and displays the position of the surgical instrument on the image of the patient in real time in the form of a virtual probe, so that a doctor can clearly know the position of the surgical instrument relative to the anatomical structure of the patient, and the surgical operation is quicker, more accurate and safer.

In surgery, the surgical site must be accurately determined, otherwise the surgery is prone to fail, and therefore, the image captured by the intraoperative camera and the image captured by the preoperative X-ray machine need to be accurately registered. Most of the existing registration methods consider the center of the CCD or CMOS element as the imaging center of the camera, but since the camera image is cropped, the imaging center is different from the center of the camera image. In addition, the distortion of the lens during the imaging of the camera is a non-negligible problem, which is caused by the inherent perspective distortion of the optical lens, and the distortion is larger as the closer to the edge of the lens, so in order to reduce the error caused by the distortion of the lens, the imaging center light should be made to pass through the optical axis of the lens as much as possible during the shooting, that is, the axial direction of the lens is perpendicular to the virtual plane of the operation.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a simple and feasible normal registration system with high precision. The technical scheme is as follows:

a normal line coincidence registration comprises an X-ray machine, a camera, a calibration target, a first adjusting module and a second adjusting module, wherein the calibration target is arranged on an imaging plate of the X-ray machine, the first adjusting module is used for adjusting the calibration target to enable the calibration target to be aligned with an imaging normal line of the X-ray machine, and the second adjusting module is used for adjusting the camera to enable the calibration target to be aligned with the imaging normal line of the camera after the calibration target is aligned with the imaging normal line of the X-ray machine.

As a further improvement of the invention, the calibration target comprises two horizontal arms and a vertical arm, the two horizontal arms are arranged in a crossed manner, the bottom of the vertical arm is arranged on the intersection point of the two horizontal arms and is vertical to the plane where the two horizontal arms are located, the top of the vertical arm is provided with a main marking ball, and two ends of the two horizontal arms are provided with auxiliary marking balls.

As a further improvement of the invention, the vertical arm and the horizontal arm are integrally formed, and the other horizontal arm comprises two assembling arms which are symmetrically assembled at two sides of the vertical arm.

As a further improvement of the invention, the two mounting arms are fixed to the vertical arm by bolts.

As a further improvement of the present invention, when the calibration target is aligned with the normal line of the X-ray machine or the camera, in the image taken by the X-ray machine or the camera, the main marker sphere is located at the intersection of the connecting lines of the two opposite auxiliary marker spheres.

As a further improvement of the invention, the main marker ball and the auxiliary marker ball are fixed to the vertical arm and the horizontal arm, respectively, by bolts.

As a further improvement of the invention, the main marker ball and the auxiliary marker ball are both provided with a reflective coating.

As a further improvement of the present invention, the present invention further comprises a third adjusting module, wherein the third adjusting module is used for coarsely adjusting the calibration target according to the laser cross line of the X-ray machine.

As a further improvement of the present invention, the first adjusting module is configured to adjust the calibration target so that the calibration target is aligned with an imaging normal of the X-ray machine, and specifically includes: the first adjusting module is used for adjusting the calibration target according to the image shot by the X-ray machine so that the calibration target is aligned to the imaging normal of the X-ray machine.

As a further improvement of the present invention, the adjusting the camera to make the calibration target align with an imaging normal of the camera specifically includes: and adjusting the camera according to the image shot by the camera so that the calibration target is aligned with the imaging normal of the camera.

The invention has the beneficial effects that:

the normal line coincidence registration system is provided with the calibration target, the first adjusting module and the second adjusting module, the calibration target is adjusted through the first adjusting module to enable the calibration target to be aligned with the imaging normal line of the X-ray machine, the camera is adjusted through the second adjusting module to enable the calibration target to be aligned with the imaging normal line of the camera, namely normal line coincidence registration of the X-ray machine and the camera is completed, the registration precision is high, simplicity and feasibility are achieved, the accuracy of surgical navigation is improved, and the risk of surgery is reduced.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of the structure of a calibration target in a preferred embodiment of the present invention.

Description of the labeling: 10. a horizontal arm; 11. a secondary marker ball; 12. assembling the arm; 20. a vertical arm; 21. the main marker ball.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

The normal line coincidence registration system in the embodiment of the invention comprises an X-ray machine, a camera, a calibration target, a first adjusting module and a second adjusting module.

The calibration target is arranged on an imaging plate of the X-ray machine, the first adjusting module is used for adjusting the calibration target to enable the calibration target to be aligned with an imaging normal of the X-ray machine, and the second adjusting module is used for adjusting the camera to enable the calibration target to be aligned with the imaging normal of the camera after the calibration target is aligned with the imaging normal of the X-ray machine, namely normal coincidence registration of the X-ray machine and the camera is completed. After the registration is completed, the calibration targets on the imaging plate of the X-ray machine are removed.

In this embodiment, the first adjusting module is configured to adjust the calibration target so that the calibration target is aligned with an imaging normal of the X-ray machine, and specifically includes: the first adjusting module is used for adjusting the calibration target according to the image shot by the X-ray machine so that the calibration target is aligned to the imaging normal of the X-ray machine.

In this embodiment, adjusting the camera so that the calibration target is aligned with an imaging normal of the camera specifically includes: and adjusting the camera according to the image shot by the camera so that the calibration target is aligned with the imaging normal of the camera.

As shown in fig. 1, the calibration target includes two horizontal arms 10 and a vertical arm 20, the two horizontal arms 10 are arranged in a cross manner, the bottom of the vertical arm 20 is arranged at the intersection point of the two horizontal arms 10 and is perpendicular to the plane of the two horizontal arms 10, the top of the vertical arm 20 is provided with a main marker ball 21, and the two ends of the two horizontal arms 10 are provided with auxiliary marker balls 11.

When the calibration target is aligned with the normal line of the X-ray machine or camera, the main marker ball 21 is located at the intersection point of the connecting lines of the two opposite auxiliary marker balls 11 in the image shot by the X-ray machine or camera.

In the present embodiment, in order to ensure the accuracy, the vertical arm 20 and one horizontal arm 10 are integrally formed, and the other horizontal arm 10 includes two mounting arms 12, and the two mounting arms 12 are symmetrically mounted on both sides of the vertical arm 20. Preferably, the two mounting arms 12 are bolted to the vertical arm 20, the mounting arms being L-shaped.

In one embodiment, the main marker ball 21 and the sub marker ball 11 are bolted to the vertical arm 20 and the horizontal arm 10, respectively.

In this embodiment, the main marker balls 21 and the sub marker balls 11 are each provided with a reflective coating. Preferably, the reflective coating is a 3M reflective material.

In this embodiment, the system further includes a third adjusting module, where the third adjusting module is configured to perform coarse adjustment on the calibration target according to the laser cross line of the X-ray machine, and the calibration target can be placed at a position on an imaging plate of the X-ray machine, so that the first adjusting module can perform fine adjustment on the calibration target.

The normal line coincidence registration system is provided with the calibration target, the first adjusting module and the second adjusting module, the calibration target is adjusted through the first adjusting module to enable the calibration target to be aligned with the imaging normal line of the X-ray machine, the camera is adjusted through the second adjusting module to enable the calibration target to be aligned with the imaging normal line of the camera, namely normal line coincidence registration of the X-ray machine and the camera is completed, the registration precision is high, simplicity and feasibility are achieved, the accuracy of surgical navigation is improved, and the risk of surgery is reduced.

The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.