Effects of Brain White Matter Anisotropic Conductivity on Distribution of EEG Calculated with Finite Element Method Based on Diffusion Tensor Image (DTI) of Nuclear Magnetic Resonance
- VernacularTitle:基于扩散张量成像利用一阶有限元方法计算脑白质各向异性电导率对脑电位分布的影响
- Author:
Zhanxiong WU
;
Shanan ZHU
;
He BIN
- Publication Type:Journal Article
- Keywords:
diffusion tensor;
conductivity tensor;
first-order finite element method
- From:Space Medicine & Medical Engineering
2006;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the influence of white matter anisotropic conductivity on scalp electric potential distribution.Methods According to the volume constraint water diffusion tensor was converted to conductivity tensor,and the five-layer(white matter,grey matter,CSF,skull,scalp)finite element model(FEM)was constructed based on the DTI data.Based on this model first-order FEM algorithm was implemented.And the scalp electric potential distribution was calculated by using current dipole modal.Results Anisotropic conductivity of white matter has influence in EEG problem,and more influence when the ratio of radius and tangential of volume constraint is greater.The right-left dipoles have more influence than superior-inferior ones.Conclusion In the study of EEG,the anisotropic conductivity of brain tissue cannot be neglected.
