An analytic solution to the homogeneous EIT problem on the 2D disk and its application to estimation of electrode contact impedances.
An analytic solution to the homogeneous EIT problem on the 2D disk and its application to estimation of electrode contact impedances.
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DOI:
10.1088/0967-3334/32/9/008
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发表时间:
2011-09
影响因子:
3.2
通讯作者:
Demidenko E
中科院分区:
文献类型:
--
作者:
Demidenko E
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. 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.
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