Finite volume method for investigating anisotropic conductivity in EEG

作     者：XIE Yaoqin, MA Xinshan , GUAN Xin, and CHENG Shaoping( Department of Electrical Engineering, Tsinghua University, Beijing 100084, China Naval Chief Hospital, Beijing, 100037, China) 

作者机构：Department of Electrical Engineering Tsinghua University Beijing 100084 China Naval Chief Hospital Beijing 100037 China 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2002年第2期

页      面：58-62页

学科分类：07[理学] 070102[理学-计算数学] 0701[理学-数学] 

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 59877009 and 59937160) 

主　　题：finite volume method anisotropy electroencephalogram. 

摘      要：A novel finite volume method is presented to investigate the effect of anisotropic conductivity on the potential distribution of the scalp. The second-order interpolation of the tetrahedral mesh is used to avoid employing the secondary element. The calculation precision is enhanced by using the Gaussian integration. To avoid the geometric singularity, the triangular prism is employed in place of the conventional hexahedron mesh. With the method, the spherical models as well as the realistic head models are simulated. The calculation results indicate that the anisotropic ratio and the position of dipole sources have great influence on the potential distribution in the electroencephalogram.