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4 Numerical Solution and Computational Considerations

Because of the geometrical complexity of, and numerous inhomogeneities inherent in, anatomical structures in physiological models, solutions of bioelectric field problems are usually tractable (except in the most simplified of models) only when one employs a numerical approximation method such as the Finite Difference (FD), the Finite Element (FE), Boundary Element (BE), or the Multigrid (MG) Method to solve the governing field equation(s).