三层人脑三维有限元脑模型的建立

Three-dimensional Finite Element Brain Model with Three-layer Tissues

目的:构建应用于脑部电磁问题研究的接近真实大脑轮廓的三维有限元脑模型。方法:分析人颅骨的结构特征和几何轮廓,利用规则几何体的组合拟合颅骨轮廓,建立颅骨轮廓模型;然后,以颅骨轮廓模型为基础,向外扩展出头皮层,向内缩小分别形成颅骨层和脑实质层;最后,利用有限元数值分析软件包对三层脑部模型进行有限元剖分。结果:建立了由头皮层、颅骨层和脑实质层组成的三层人脑三维有限元脑模型。结论:本模型构建方便、快速,与真实人脑结构近似程度高,为脑部电磁问题的研究提供了一种适合的仿真模型。

Objective To study and establish a three-dimensional finite element brain model closing to realistic brain contour,which is applied to electromagnetism study of brain.Methods The organizational characteristics and geometric contour of realistic skull were analyzed.The first step was to establish the skull model with regular geometry.Then the skull model was expended to build the skin-layer,contracted to build skull-layer and brain parenchyma.Finally,the brain model with three-layer tissues was finite element meshed using the modeling tools of finite element software Comsol.Results A three-dimensional finite element brain model with skin,skull and brain parenchyma were established.Conclusion The processes of model building are convenient,fast and provide a conformable finite element brain model for the electromagnetism study of human brain.The contour of brain model is close to the realistic boundary conditions of human brain.