Instrument recognizing method for passive optical operation navigation

A technology of surgical navigation and identification method, applied in surgical navigation systems, surgery, surgical instruments, etc., can solve problems such as difficulties, achieve the effects of good identification and tracking, simple implementation methods, and improved interchangeability

Inactive Publication Date: 2008-12-24
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the implementation of this method has certain difficulties, because it is necessary to design and process a variety of landmark points, and it is difficult to locate and distinguish them in the image.

Method used

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  • Instrument recognizing method for passive optical operation navigation
  • Instrument recognizing method for passive optical operation navigation
  • Instrument recognizing method for passive optical operation navigation

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing and example the present invention will be further described:

[0037] When designing the layout of marker points on surgical instruments that can be tracked and positioned, the design principles of marker point layout in the invention concept should be fully considered, and different marker point layout schemes should be selected to facilitate identification. For example, try to use a device to be identified with a layout of four coplanar marker points, and the distance and arrangement of the four marker points are significantly different.

[0038] As an example of specific implementation, the instruments with 5 different marker point layouts shown in Table 1 can be used, and the distances between the marker points are shown in Table 1. In this example, the differences between the distances formed between the marking points on the same instrument are all greater than 5mm, and the layout of the marking points on each instrum...

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Abstract

The present invention provides an appliance identification method used in passive optical operation navigation, pertaining to the application field of the information technology in clinic. Firstly, the sign points of appliances to be identified are distributed as follows: the shape of the fixed sign point on each appliance is totally the same but the distance among the sign points on the same operational appliance is different and the distance among the sign points on different appliances is obviously different. In detection, the binocular vision principle is firstly utilized to detect the sign points in the three-dimensional space; then a match detection is carried out according to the geometric relationship among the sing points according to the known sign points on the appliances; if such combination can be found, the match is completed and the appliance is thought to be constituted by the selected sign points. The advantages of the present invention include making the passive tacking and positioning of various operational appliances only by using one kind of sign points with same specifications, increasing the interchangeability of damageable sign points and reducing the cost for replacing sign points.

Description

technical field [0001] The present invention is an instrument identification method for passive optical surgical navigation. The method utilizes an optical motion tracking system to simultaneously track and identify a plurality of surgical instruments equipped with passive marker points, and is used for simultaneous navigation and positioning in computer-assisted surgery. Tracking and identification of multiple passively marked surgical instruments. The invention belongs to the field of application of information technology in clinical medicine. technical background [0002] With the development of information technology, computer vision technology has been used to guide surgery in clinic, so that the surgery can be minimally invasive and precise. In order to guide the operation, it is necessary to obtain the relative positional relationship between the instrument and the human body. The most commonly used is the infrared optical three-dimensional positioning tracking syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B19/00A61B17/94A61B34/20
Inventor 王广志丁辉郭兆君
Owner TSINGHUA UNIV
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