Solving the three-dimensional EIT forward problem using finite element method

Electrical impedance tomography (EIT) is a newly developed technique by which impedance measurements from the surface of an object are reconstructed into impedance image. But in the initial stage, the EIT problem is regarded as the two-dimensional EIT problem, which ignores too much important information and makes it can´t give the exact spatial information of the place where the impedance has changed because of some diseases. We pay much attention to the three-dimensional EIT and here the finite element method (FEM) is used. Tetrahedron is used in the subdivision. The potential of each node can be given by the solution of the forward problem, which is the reference of the EIT inverse problem, and it is proved close to the analysis solution.