Development and preliminary evaluation of VISLAN, a surgical planning and guidance system using intra-operative video imaging
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- 作者：Colchester ; Alan C. F. ; Zhao ; Jason ; Holton-Tainter ; Kerrie S. ; Henri ; Christopher J. ; Maitland ; Neil ; et. al.
- 关键词：enhanced reality ; image guided surgery ; localizer ; registration ; segmentation ; video imaging ; virtual reality
- 刊名：Medical Image Analysis
- 出版年：1996
- 出版时间：March, 1996
- 年：1996
- 卷：1
- 期：1
- 页码：73-90
- 全文大小：892 K
文摘
VISLAN is an integrated neurosurgical planning and guidance system. New segmentation and rendering techniques have been incorporated. A stereo video system is used intra-operatively and fulfils four roles. First, the video display is overlaid with graphical outlines showing the position of the planned craniotomy or the target (enhanced reality displays). Second, a skin surface patch is reconstructed from the stereo video images using patterned light (mean errors of surface point location are <0.15 mm). Third, a freely mobile, hand-held localizer is tracked in real time (position errors are <0.5 mm and with improved calibration <0.2 mm), with its position superimposed on the pre-operative patient representation to assist surgical guidance. Fourth, markers fixed to the skull bone next to the cranial opening are used to detect intra-operative movement and to update registration. Initial results from phantom experiments show an overall system accuracy of better than 0.9 mm for intra-operative localization of features defined in pre-operative images. The prototype system has been tested during six neurosurgical operations with very good results.