Development and preliminary evaluation of VISLAN, a surgical planning and guidance system using intra-operative video imaging

✍ Scribed by Alan C.F. Colchester; Jason Zhao; Kerrie S. Holton-Tainter; Christopher J. Henri; Neil Maitland; Patricia T.E. Roberts; Christopher G. Harris; Richard J. Evans

• Book ID: 104404471
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 892 KB
• Volume: 1
• Category: Article
• ISSN: 1361-8415
• DOI: 10.1016/s1361-8415(01)80006-2

✦ Synopsis

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.