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Electrical impedance tomography reconstruction algorithm based on general inversion theory and finite element method.

T Mengxing·D Xiuzhen·Q Mingxin·F Feng·S Xuetao·Y Fusheng
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Abstract

A strict EIT reconstruction algorithm, the general inversion algorithm (GIA) is presented. To improve the noise performance, the algorithm is modified by attenuating the condition number of the forward matrix F and implemented using an improved FEM scheme, to obtain the 2D image of impedance change (dynamic image). This modified general inversion algorithm (MGIA) can be used on a larger dimension FEM model (248 elements) and is more practical than the GIA. When implementing this algorithm in computer simulation and in a physical phantom, it is found that the MGIA has a smaller reconstruction error than the currently used algorithms (equipotential-back-projection algorithm and filtered spectral expansion algorithm). With 0.1% white noise in the data, the algorithm can still reconstruct images of a complicated model. Further improvements are also discussed.

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AlgorithmsElectric ImpedanceFinite Element AnalysisHumansTomographyJournal Article

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BibTeXRIS

T Mengxing, D Xiuzhen, Q Mingxin, F Feng, S Xuetao, Y Fusheng. 1998. Electrical impedance tomography reconstruction algorithm based on general inversion theory and finite element method.. https://doi.org/10.1007/bf02523205

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