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A review of image reconstruction techniques for electrical impedance tomography
Author(s) -
Barber D. C.
Publication year - 1989
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.596368
Subject(s) - electrical impedance tomography , electrical impedance , iterative reconstruction , tomography , voltage , image quality , acoustics , tomographic reconstruction , body surface , image resolution , nonlinear system , computer science , materials science , physics , optics , image (mathematics) , mathematics , computer vision , geometry , quantum mechanics
There has recently been an increasing interest in the possibility of producing images of electrical impedance within the human body. When an electric current is applied to the body of a voltage distribution is developed across the body surface. This distribution is in part dependent on the internal impedance distribution within the body and its is possible to estimate this distribution from a suitable set of voltage measurements. Because of the nonlinear relationship between the impedance distribution and the voltage distribution at the surface of the body, the reconstruction problem is much more difficult than for other tomographic imaging techniques, but a significant amount of progress has been made, and it is now possible to produce tomographic images of i n v i v o distributions of impedance, albeit with low spatial resolution. Future developments should improve image quality.