A reconstruction algorithm of electrical impedance tomography with optimal configuration of the driven electrodes

Author

Kyriacou, George A. ; Koukourlis, Christos S. ; Sahalos, John N.

Author_Institution

Dept. of Electr. Eng., Demokritos Univ. of Thrace, Xanthi, Greece

Volume

12

Issue

3

fYear

1993

fDate

9/1/1993 12:00:00 AM

Firstpage

430

Lastpage

438

Abstract

A reconstruction algorithm for electrical impedance tomography (EIT) is presented. The least-squares (LS) method is applied and a formulation similar to that of the perturbation method is found. The main difference from perturbation lies with the sensitivity matrix, which here is replaced by the Jacobian matrix, defined in terms of the partial derivatives of every sensing electrode pair voltage difference with respect to every element´s conductivity. The mutual position between the active electrodes is chosen to give optimum sensitivity. The results shown that the algorithm presented here has a better convergence and needs fewer iterations than the perturbation method

Keywords

computerised tomography; electric impedance imaging; image reconstruction; Jacobian matrix; active electrodes; driven electrodes; electrical impedance tomography; electrode pair voltage difference; iterations; least-squares method; medical diagnostic imaging; optimal electrodes configuration; partial derivatives; perturbation method; reconstruction algorithm; sensitivity matrix; Boundary conditions; Conductivity; Electrodes; Impedance; Jacobian matrices; Laplace equations; Perturbation methods; Reconstruction algorithms; Tomography; Voltage;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.241870

Filename

241870