Patient Surface Registration Method Applied to Markerless Optical Surgical Navigation System

Abstract

The invention discloses a patient surface registration method applied to an unmarked point optical surgery navigation system. The steps include: 1) obtaining spatial image data of a patient image: anoriginal point set and a simplified point set; 2) acquiring the actual spatial surface data of the patient: a laser point set and the simplified point set; 3) screening an optimal matching-rough matching transformation matrix set by gridding and eight-azimuth matching method; and 4) finding a matching matrix set and the corresponding matching error based on the previous step, screening the optimaltransformation matrix of the fine matching step according to the error, and 5) according to 3) and 4), obtaining the total optimal transformation matrix to complete the spatial registration. The method uses an infrared laser lamp to illuminate the surface of the patient to obtain the data space registration of the actual space, uses gridding for searching optimization, and matches the set of points to-be-matched with a target point set by eight different orientations, the two steps avoid the situation that the matching result falls into local optimum, and the method realizes the function of automatic registration.

Description

technical field [0001] The invention relates to the technical field of optical surgical navigation, in particular to a patient surface registration method applied to a markerless optical surgical navigation system. Background technique [0002] Surgical navigation system is more and more widely used clinically, and it has become an important development direction for precise and minimally invasive surgical treatment. Compared with the corresponding traditional surgery, it has made great improvements in terms of surgical accuracy, surgical time consumption, surgical trauma, and postoperative efficacy. During intraoperative navigation, the system can assist doctors in performing surgery by visualizing the location of surgical tools and patient features in real space, thereby improving surgical accuracy and reducing patient injuries. The key step of the navigation system is the transformation relationship between the real space and the image space, and this step is called regi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and propose a patient surface registration method applied to an optical surgical navigation system without marking points. Problems such as limited pasting of marking points avoid errors caused by manual extraction of marking points. At the same time, the registration process is simple to operate, the registration time is short, and the registration accuracy can meet clinical requirements.

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