Rekonstruktion der Leitfähigkeitsverteilung mit einem Impedanztomographen: 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 reconstuction 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 graphically on a PC. The resolution is fine enough to envisage applications in medical diagnostcs.