Solution of the inverse problem of magnetic induction tomography (MIT) with multiple objects: analysis of detectability and statistical properties with respect to the reconstructed conducting region.
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.
Merwa
Robert
R
Institute for Medical Engineering, Graz University of Technology, Krenngasse 37, 8010 Graz, Austria. merwa@tugraz.at
Brunner
Patricia
P
Missner
Andreas
A
Hollaus
Karl
K
Scharfetter
Hermann
H
D000465:Algorithms; D003198:Computer Simulation; D017097:Electric Impedance; D005240:Feasibility Studies; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008280:Magnetics; D008954:Models, Biological; D015233:Models, Statistical; D009010:Monte Carlo Method; D010992:Plethysmography, Impedance / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014054:Tomography / Q000379:methods*