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A Method for Determining Tissue Conductivity and Thickness in Stratified Biological Structure

A simple method is proposed for determining the tissue conductivity and layer thickness in a stratified biological structure. Under illumination of a horizontal coil above the biological structure, a secondary magnetic field is generated, which results in a change of impedance of the coil. From the measured change of the coil impedance, the conductivity of tissue of interest and the layer thickness can be determined by an inverse calculation. To explore the feasibility of the proposed method, a numerical simulation for the measurement and an inverse computational technique, based on an improved genetic algorithm, are developed and presented.