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 reg...

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Bibliographic Details
Published in:Physiological measurement 2006-05, Vol.27 (5), p.S249-S259
Main Authors: Merwa, Robert, Brunner, Patricia, Missner, Andreas, Hollaus, Karl, Scharfetter, Hermann
Format: Article
Language:English
Subjects:
Algorithms
Computer Simulation
Electric Impedance
Feasibility Studies
Image Interpretation, Computer-Assisted - methods
Magnetics
Models, Biological
Models, Statistical
Monte Carlo Method
Plethysmography, Impedance - methods
Reproducibility of Results
Sensitivity and Specificity
Tomography - methods
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Summary: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.
ISSN:0967-3334
1361-6579
DOI:10.1088/0967-3334/27/5/S21