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Electrical impedance tomography using induced and injected currents
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029581.pdf
Date
1992-01-01
Author
Gençer, Nevzat Güneri
İder, Y. Ziya
Kuzuoğlu, Mustafa
Metadata
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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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.
Subject Keywords
Biophysics
URI
https://hdl.handle.net/11511/35058
Journal
CLINICAL PHYSICS AND PHYSIOLOGICAL MEASUREMENT
DOI
https://doi.org/10.1088/0143-0815/13/a/019
Collections
Department of Electrical and Electronics Engineering, Article