Reconstruction of conductivity distributions by means of an impedance tomograph

We have built an electrical impedance tomograph which makes it possible to reconstruct impedance distributions in the interior of a cylinder by means of measurements of currents and potentials on its boundary. The reconstucti on algorithm is based on Newton's algorithm for the solution of non-linear integral equations, where the electric fields are calculated by the methods of finite elements and finite integrals. The results can be represented gr aphically on a PC. The resolution is fine enough to envisage applications i n medical diagnostcs.