Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (35): 6584-6587.doi: 10.3969/j.issn.1673-8225.2011.35.029

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Optical localizer of surgical navigation system based on binocular stereo vision

Wu Xue-mei, Liu Qi   

  1. School of Electrical Engineering & Information, Sichuan University, Chengdu  610065, Sichuan Province, China
  • Received:2011-03-23 Revised:2011-06-21 Online:2011-08-27 Published:2011-08-27
  • Contact: Liu Qi, Doctor, Associate professor, Master’s supervisor, School of Electrical Engineering & Information, Sichuan University, Chengdu 610065, Sichuan Province, China
  • About author:Wu Xue-mei★, Studying for master’s degree, School of Electrical Engineering & Information, Sichuan University, Chengdu 610065, Sichuan Province, China struing@yahoo.cn

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Abstract:

BACKGROUND: Localizer of surgical navigation system based on binocular stereo vision can supply real-time displays of the relative location and orientation between surgical instruments and the lesion location for doctors. It can improve surgical precision and reduce the time of surgery, makes it possible for that conventional surgery can not achieve.
OBJECTIVE: To localize the points of markers for navigation on the surgical needle-holder by binocular stereo vision.
METHODS: First, extract characteristics of the central objectives of markers for navigation on the surgical needle-holder by gravity method with threshold; Second, Considering that the surgical navigation system requires high-precision location and well stability, with the camera’s calibrating results by Zhang’s camera calibration method, get the three-dimensional coordinates of markers for navigation on the surgical needle-holder by least square method, and then relative location between puncture needle and the lesion site will be given.
RESULTS AND CONCLUSION: Stereo Optical Localizer System can fulfill real-time positioning of markers for navigation on the surgical needle-holder under the current experiment condition and the surgical precision is high enough for the need of surgical navigation.

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