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Solution of the inverse problem of magnetic induction tomography (MIT) with multiple objects: analysis of
Robert Merwa1, Patricia Brunner, Andreas Missner
1Institute for Medical Engineering, Graz University of Technology, Krenngasse 37, 8010 Graz, Austria. merwa@tugraz.at
Abstract:
Magnetic induction tomography (MIT) is a technique to image the passive electrical properties (i.e. conductivity, permittivity, permeability) of biological tissues. The inverse eddy current problem is nonlinear and ill-posed, thus a Gauss-Newton one-step method in combination with four different regularization schemes is used to obtain stable solutions. Simulations with 16 excitation coils, 32 receiving coils and different spherical perturbations inside a homogeneous cylinder were computed. In order to compare the statistical properties of the reconstructed results a Monte Carlo study with a SNR of 40 dB and 20 dB was carried out. Simulated conductivity perturbations inside a homogeneous cylinder can be localized and resolved and the results prove the feasibility of difference imaging with MIT.
