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Proceedings Paper

Multifrequency electrical impedance tomography: tissue characterization and image quality
Author(s): A. M. Shallof; David C. Barber
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Paper Abstract

Electrical impedance tomography, is a non-invasive imaging technique with widespread applications in medicine and industry. It aims to image the conductivity distribution within a test column by making electrical measurements on the surface of the volume. Reconstruction of the conductivity distribution in electrical impedance tomography is under-determined and ill-posed problem, typically requiring simplifying assumptions or regularization and least squares with linear inequality constraints solutions to improve the image quality. The ability to consider least squares problems with linear inequality constraints solution allows us in particular to have such constraints on the solution as non-negativity conductivity values. A new method concerning multi-frequency electrical impedance tomography has been developed and the full information contained in the complex tissue conductivity can be obtained. The results using least squares problems with linear inequality constraints solution are presented.

Paper Details

Date Published: 7 May 1997
PDF: 9 pages
Proc. SPIE 3031, Medical Imaging 1997: Image Display, (7 May 1997); doi: 10.1117/12.273952
Show Author Affiliations
A. M. Shallof, Royal Hallamshire Hospital (United Kingdom)
David C. Barber, Royal Hallamshire Hospital (United Kingdom)


Published in SPIE Proceedings Vol. 3031:
Medical Imaging 1997: Image Display
Yongmin Kim, Editor(s)

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