The bioelectric conduction model plays a key role in bioelectromagnetism analysis, such as solving electromagnetic forward and inverse problems. This paper is aimed to develop ananisotropic subvoxel-smooth conduction model (ASCM) to characterize the electrical conductivitytensor jump across the tissue interface, which is derived based on the interfacial continuity condition with asymptotic analysis method. This conduction model is furthermore combined with finite volume method to improve the numerical accuracy for solving electromagnetic forward problem. The performance of ASCM for electrical potential analysis is verified by comparison with analytic solution. The method is also applied to investigate the effect of anisotropicconduction on EEG analysis in a realistic human head model.

J. Appl. Phys. 119, 024701 (2016)

The schematic diagram of voxel cross tissue interface.