COMPUTER-ASSISTED GEOMETRIC DESIGN OF CEREBRAL ANEURYSMS FOR SURGICALSIMULATION

THIS REPORT PRESENTS conceptual aspects and the clinical implications of a computer-assisted geometric design of a cerebral aneurysm and sur rounding structures. The technique is based on the approximation power of the parametric spline function, which achieves interpolation and s urface fitting of the arterial information obtained by conventional an giography. Computer graphic transformations including shifting, scalin g, rotation, and putting different colors in different intensities mak e it possible to obtain the surgical simulation of a cerebral aneurysm . To our knowledge, this is the first report in which the computer gra phic simulation of the surgical view of a cerebral aneurysm is made wi th a personal computer. Using our method, it may be possible to obtain the surgical simulation of a more complicated view by introducing a n avigation system of a new style for conventional open neurosurgery. Co ncepts and the technical details of the method are described.