Electrical impedance tomography using induced and injected currents

A two-dimensional forward problem formulation is introduced for electrical impedance tomography (EIT) using induced currents. The forward problem is linearised around a certain resistivity distribution and the inverse problem is formulated as a solution of a linear system of equations. Sensitivity of boundary measurements to resistivity variations arc analysed for spatially uniform, linear and quadratic fields. The formulation, however, is suitable for studying the effects of a general magnetic field applied to induce the currents in the conductive object. A similar inverse problem formulation is also developed for EIT using injected currents. Simulation studies are performed by reconstructing images of a simulation distribution using both methods separately with generalised inversion. It is also shown that the derived formulations for the inverse problems of the two methods can be combined to solve a larger set of equations with a greater number of independent measurements.

Citation Formats
N. G. Gençer, Y. Z. İder, and M. Kuzuoğlu, “Electrical impedance tomography using induced and injected currents ,” CLINICAL PHYSICS AND PHYSIOLOGICAL MEASUREMENT, vol. 13, pp. 95–99, 1992, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35058.