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Three dimensional electrical impedance tomography in thorax complete model.

The forward problem and the inverse problem are both researched. The opposite drive pattern is adopted with single drive current pattern. The potential distributions of inhaling and exhaling models are gotten in the forward problem, which are obtained by finite element method. The inverse problem is realized by Homotopy-Newton-Raphson algorithm, which needs times of revising the impedance after comparing the measuring potentials and the computing ones on the electrodes. The solution of the inverse problem is benefit for monitoring the activities in the thorax, such as inhaling and exhaling. Three dimensional electrical impedance tomography in the thorax complete model is provided in this paper, which is consisted with lung, muscle, heart and spinal column.