Real-time free bone fragment tracing method for surgical navigation system

Abstract

The invention discloses a real-time free bone fragment tracing method for a surgical navigation system. A corresponding relation between a coordinate system relevant to a free bone fragment and a three-dimensional model coordinate system is built according to a mark point method and a geometric characteristic face scanning method or a positioning array method; after the free bone fragment is displaced during operation, the real-time space position information generated after the bone fragment is reset is obtained through reading or rescanning a mark point or a geometric characteristic face, or through a positioning array; real-time visual display of a three-dimensional model corresponding to the whole bone fragment in the navigation system is achieved according to the position information after the bone fragment is reset. By means of the real-time free bone fragment tracing method, time and labor are saved, the method is free of depending on doctor experience, error diagnosis is not easily caused, and safety, accuracy and effectiveness of the operation are improved.

Description

technical field [0001] The invention belongs to the technical field of computer-aided surgery, and relates to a functional method for positioning, tracing and displaying. Background technique [0002] In traditional surgery, surgeons use imaging data, combined with their own knowledge reserves and clinical experience, to analyze the spatial positional relationship between tissues in the surgical area, and then perform surgery based on the doctor's experience. This method is not easy to determine the spatial position of some variable structures information, positioning accuracy is low, and the safety and effectiveness of the operation cannot be guaranteed. With the development of industry and computer technology, computer surgical navigation technology came into being. During the operation, the corresponding relationship between the patient's reference coordinate system and the image data virtual coordinate system is established through registration. According to the preoper...

AI Technical Summary

Problems solved by technology

[0003] The process of locating and guiding the bone block reset by the existing computer surgical navigation technology requires the use of tracer tools to explore the surface of the bone block in all directions, so as to indirectly obtain the spatial position and posture of the bone block; and this method locates the bone block model with a three-dimensional structure It is cumbersome and requires all-round exploration to obtain the exact position of the bone block, which prolongs the operation time; in addition, this method requires the surgeon to have a strong three-dimensional imagination ability to fit the point set obtained by the exploration in his mind The three-dimensional structure lacks an intuitive overall display. Only based on the local shape formed by the point set obtained by exploration, it is easy to misjudge the overall position and posture of the bone block, resulting in a decrease in the efficacy and even safety of the operation. A big hidden danger in the process

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