用于电阻抗断层成像的脑部三层有限元模型构建与仿真

Construction and Simulation of a 3D Brain Finite Element Model for Electrical Impedance Tomography

在电阻抗断层成像技术研究过程中,人体准确模型的构建和仿真对分析各种生理病理因素影响,评估成像算法质量等具有重要的价值。目前大多数电阻抗成像模型和仿真都采用二维简单模型,难以完成一些三维因素的准确仿真和研究。针对这一问题,本文提出了一种用于电阻抗断层成像的脑部三层有限元模型构建与仿真方法。首先,通过COMSOL建立脑部有限元仿真模型,然后联合运用MATLAB和COMSOL实现电阻抗断层成像的仿真。仿真结果表明,本文方法可以快速实现复杂模型的构建和仿真,该模型将来可用于脑部成像的研究。

Construction and simulation of finite element models of human body were needed to analyze the influences of physiological and pathological factors and evaluate the qualities of reconstruction algorithm in EIT（Electrical Impedance Tomography）. As a commonly-used model at present, traditional 2D（Two Dimensional） models were incapable to perform some of the 3D（Three Dimensional） simulation and researches. In view of this problem, the paper proposed a method for construction and simulation of a 3D brain finite element model for EIT. The model was built firstly through application of COMSOL. Then, a simulation experiment was performed with the application of combination of MATLAB and COMSOL. According to the results, the method could rapidly realize the construction and simulation of complicated models which would be further used for researched on brain imaging.