A new focusing excitation method based on magnetic induction tomography

Abstract

Magnetic induction tomography (MIT) is a new and non-invasive reconstruction method which reconstructs the conductivity distribution information within the target object by the eddy current signal. Due to the low conductivity for human, the eddy current field reflecting human conductivity is so weak. On the basis of analyzing magnetic field and excitation magnetic field, the conical spiral coil is proposed which can produce the focusing magnetic field. The measurement model with the target object whose parameters are near to the tissue is established for the focusing excitation coil. The primary field and the eddy current field produced within the target object are calculated and analyzed comparatively. The results show that the proposed focusing excitation coils that produces the excitation field and the eddy current field have the focusing effect, that is to say it can produce the focusing eddy current field, which provides an effect method for MIT from the eddy current source.