Current Injection Optimization for Magnetic Resonance-Electrical Impedance Tomography (MREIT)

Abstract

Abstract-Determining optimum current injection pattern is of interest in magnetic resonance-electrical impedance tomography (MREIT), since it helps in detecting smaller inhomogeneities within the body when total injected current into the body is limited. Based on this fact, for 2-D cylindrical body with concentric and cylindrical inhomogeneity, current injection optimization problem is analytically formulated, based on distinguishability definition for MREIT. The exterior penalty method is used to solve the optimization problem. In the second step, the same problem is considered for eccentric and cylindrical inhomogeneity and the best current injection pattern is obtained.