An analytic solution to the homogeneous EIT problem on the 2D disk and its application to estimation of electrode contact impedances.

Abstract:

:An analytic solution of the potential distribution on a 2D homogeneous disk for electrical impedance tomography under the complete electrode model is expressed via an infinite system of linear equations. For the shunt electrode model with two electrodes, our solution coincides with the previously derived solution expressed via elliptic integral (Pidcock et al 1995 Physiol. Meas. 16 77-90). The Dirichlet-to-Neumann map is derived for statistical estimation via nonlinear least squares. The solution is validated in phantom experiments and applied for breast contact impedance estimation in vivo. Statistical hypothesis testing is used to test whether the contact impedances are the same across electrodes or all equal zero. Our solution can be especially useful for a rapid real-time test for bad surface contact in clinical setting.

journal_name

Physiol Meas

authors

Demidenko E

doi

10.1088/0967-3334/32/9/008

subject

Has Abstract

pub_date

2011-09-01 00:00:00

pages

1453-71

issue

9

eissn

0967-3334

issn

1361-6579

pii

S0967-3334(11)89659-0

journal_volume

32

pub_type

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