Feasibility of head imaging using multi-frequency magnetic induction tomography

Magnetic induction tomography (MIT) is a low resolution imaging modality which attempts to reconstruct the electrical conductivity distribution in the body. In MIT, are induced within the body via transmitter coils and the magnetic field of these currents are measured by an array of receiver coils encircling the body. The multi-frequency excitation permits imaging of motionless organs like the brain, since the frequency dependence of the biological tissue conductivities. In this work, the feasibility of the head imaging using multi-frequency MIT was investigated using a multi-shell spherical head model. The excitation frequency was chosen from 10 kHz to 10 MHz which covers the beta-dispersion region of the biological tissues of interest and the conductivities for the head tissues were assigned based on a Cole model. Moreover, the bleeding in head was modeled and the reconstructed head images were presented.