An instrumental electrode model for solving electrical impedance tomography forward problems

Zhang, Weida and Li, David (2014) An instrumental electrode model for solving electrical impedance tomography forward problems. Physiological Measurement, 35 (10). pp. 2001-2026. ISSN 0967-3334

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Abstract

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.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA0165 Engineering instruments, meters, etc. Industrial instrumentation
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK0452 Electric apparatus and materials. Electric circuits. Electric networks
Depositing User: David Day-Uei Li
Date Deposited: 10 Jun 2014 07:35
Last Modified: 07 Mar 2017 06:22
URI: http://sro.sussex.ac.uk/id/eprint/48938

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