Brain tissues anisotropic conductivity model based on diffusion tensor imaging

The brain tissue conductivity not only plays key role in the analysis of electroencephalography (EEG) and magnetoencephalography (MEG), but also is one key factor of diagnosing brain functional change in time. Diffusion tensor imaging (DTI) is a non-invasive imaging method, with high spatial-resolution. The importance of conductivity imaging of brain inner tissue is remarkable. This paper summarized the existing WM anisotropic conductivity models, including the model of linear-eigenvalues, the model of electric viscous force balance, Wang-constraint model, volume-constraint model, volume fraction model, and electrochemical model. At last the properties of these models were discussed, and the forward trend of this topic was discussed.