Statistical estimation of EIT electrode contact impedance using magic Toeplitz matrix.

Statistical estimation of EIT electrode contact impedance using magic Toeplitz matrix.
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DOI:
10.1109/tbme.2011.2125790
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发表时间:
2011-08
期刊:
IEEE transactions on bio-medical engineering
影响因子:
--
通讯作者:
Hartov A
Hartov A
中科院分区:
其他
文献类型:
--
作者:
Demidenko E;Borsic A;Wan Y;Halter RJ;Hartov A

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本文的目标是提出一种快速可靠的方法来同时估计同质二维圆盘的电导率和电极接触阻抗。 Magic Toeplitz 矩阵作为具有有限宽度电极的 Neumann-to-Dirichlet 映射,在我们的线性模型(称为 gapZ 模型)中发挥着核心作用。该模型可以使用 F 检验来测试各种假设,例如电极阻抗的均匀性及其统计显着性。将gapZ模型与有限元近似进行比较,并通过充满盐水的模型水箱实验进行说明和验证。此外,该模型还用患者乳房 EIT 数据进行说明,以识别接触不良的电极。
The goal of this paper is to propose a fast and reliable method of simultaneous estimation of conductivity and electrode contact impedances for a homogeneous 2-D disk. Magic Toeplitz matrix as the Neumann-to-Dirichlet map with finite width electrodes plays the central role in our linear model, called the gapZ model. This model enables testing of various hypotheses using the F-test, such as the uniformity of electrode impedances and their statistical significance. The gapZ model is compared with the finite element approximation, and illustrated and validated with a phantom tank experiment filled with saline. Further, this model was illustrated with the patient breast EIT data to identify bad contact electrodes.