0934 脳神経外科ナビゲーション手術でのブレインシフトの有限要素解析(S05-1 生体のシミュレーション・モデリング・計測(1),S05 生体のシミュレーション・モデリング・計測)

概要

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Image-guided surgery has been becoming a standard technique in the field of neurosurgery. However, brain shift throughout the surgical procedure has been a major issue affecting the spatial accuracy of conventional neuronavigation system. This study aims at developing the anatomically detailed three-dimensional finite element brain model and demonstrating the prediction capability of gravity-induced brain shift using the developed finite element brain model without additional acquisition of intraoperative imaging data. The model of brain parenchyma consisted of 253,278 tetrahedral elements whose material property was hyper-viscoelastic model presented in the literature. The computation of the gravity-induced brain shift by assuming that the patient was positioned lateral (left fronto-temporal craniotomy) was conducted using ABAQUS/Explicit. Deformation of the brain surface due to gravity after dura opening was demonstrated in 3D view with color-coded surface rendering and good agreement with the clinically experienced brain shift reported in the literature. The illustrative results successfully demonstrated the prediction capability of brain shift using the developed model.
社団法人日本機械学会の論文
2007-09-07