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An instrumental electrode model for solving electrical impedance tomography forward problems

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journal contribution
posted on 2023-06-08, 17:35 authored by Weida Zhang, David Li
An instrumental electrode model (IEM) capable of describing the performance of electrical impedance tomography (EIT) systems in the MHz frequency range has been proposed. Compared with the commonly used Complete Electrode Model (CEM), which assumes ideal front-end interfaces, the proposed model considers the effects of non-ideal components in the front-end circuits. This introduces an extra boundary condition in the forward model and offers a more accurate modelling for EIT systems. We have demonstrated its performance using simple geometry structures and compared the results with the CEM and full Maxwell methods. The IEM can provide a significantly more accurate approximation than the CEM in the MHz frequency range, where the full Maxwell methods are favoured over the quasi-static approximation. The improved electrode model will facilitate the future characterization and front-end design of real-world EIT systems.

Funding

Microwave breast cancer diagnosis; WZVI, Ltd.

History

Publication status

  • Published

File Version

  • Published version

Journal

Physiological Measurement

ISSN

0967-3334

Publisher

IOP Publishing

Issue

10

Volume

35

Page range

2001-2026

Department affiliated with

  • Engineering and Design Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2014-06-10

First Open Access (FOA) Date

2014-09-22

First Compliant Deposit (FCD) Date

2014-06-09

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