A Fundamental Study on Theory of Space Distribution Estimation for EIT

摘要

We proposed the new electrode that was called "divided electrode"for a high-speed measurement of bio-impedance aiming at the practical use of EIT(Electrical impedance tomography).This paper describes parameter estimation algorithm from the measurement impedance data by using the proposed divided electrode.In order to confirm the usefulness of the proposed estimation method,the cross section of the tissue represented by spatial distribution equivalent circuit model of tissue structure known,to understand constitution,and estimated those parameters by inverse algorithm.Models take account of tumor and contact impedance caused when measuring it.Impedance parameter is estimated by use of the Gauss-Newton method.Consequently,evaluation of computer simulations demonstrates the usefulness and practicability as a new EIT technology.