Colchester A C, Zhao J, Holton-Tainter K S, Henri C J, Maitland N, Roberts P T, Harris C G, Evans R J
Department of Neurology, UMDS, Guy's Hospital, London, UK.
Med Image Anal. 1996 Mar;1(1):73-90. doi: 10.1016/s1361-8415(01)80006-2.
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.
VISLAN是一个集成的神经外科手术规划与引导系统。该系统融入了新的分割和渲染技术。术中使用了一个立体视频系统，它发挥着四个作用。第一，视频显示器上叠加有图形轮廓，显示计划开颅手术的位置或目标（增强现实显示）。第二，利用图案光从立体视频图像中重建皮肤表面贴片（表面点定位的平均误差<0.15毫米）。第三，一个可自由移动的手持式定位器被实时跟踪（位置误差<0.5毫米，校准改进后<0.2毫米），其位置叠加在术前患者模型上以辅助手术引导。第四，固定在颅骨开口旁颅骨上的标记用于检测术中移动并更新配准。模型实验的初步结果表明，对于术前图像中定义的特征进行术中定位，整个系统的精度优于0.9毫米。该原型系统已在六次神经外科手术中进行了测试，效果非常好。
