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

A surgical navigation and real-time display technology, applied in surgery, medical science, diagnosis, etc., can solve problems such as misjudgment of the overall position and posture of bone fragments, reduced safety of surgical efficacy, and lack of display.

Inactive Publication Date: 2015-03-25
SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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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 operat...

Method used

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

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Embodiment Construction

[0045] Such as figure 1 Shown:

[0046] 1. Preoperative planning: During the preoperative design, image segmentation and reconstruction are performed for the bone fragments that need to be displaced during the operation, and the corresponding three-dimensional models of the bone fragments are obtained.

[0047] 2. During the operation, the patient's real coordinate system and virtual coordinate system are registered and registered to establish the spatial correspondence between the patient and the virtual environment.

[0048] 3. Cut open and separate layer by layer, fully expose the bone that needs to be moved, and ensure that the bone is not displaced

[0049] 4. The establishment of the corresponding position relationship of the bone block coordinate system:

[0050] The three methods all involve three coordinate systems, one is the image coordinate system associated with the overall model of the skull (denoted as COS image1 ), and the second is the image coordinate syst...

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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...

Claims

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Application Information

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IPC IPC(8): A61B19/00
Inventor 李寅炜范先群庄艾苏蕴
Owner SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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