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Sensitivity matrix and reconstruction algorithm for EIT assuming axial uniformity
K Jerbi1, W R Lionheart, P J Vauhkonen
1Biomedical Engineering Institute, University of Karlsruhe, Germany. up0c@rz.uni-karlsruhe.de
Physiological Measurement
|March 17, 2000
Abstract:
In electrical impedance tomography (EIT) two-dimensional models continue to be applied despite their known inability to provide correct reconstruction. In this paper, a reconstruction algorithm that assumes a translationally invariant conductivity distribution is described. A more precise forward solver is obtained by taking off-slice currents into consideration. An appropriate sensitivity matrix is derived. Numerical evidence for the improvement in precision compared to two-dimensional reconstruction is given.