A novel approach to compute the impedance matrix of a cochlear implant system incorporating an electrode-tissue interface based on finite element method

T.m. Choi; Wei Dian Lai; Sih Sian Lee

doi:10.1109/TMAG.2006.872461

A novel approach to compute the impedance matrix of a cochlear implant system incorporating an electrode-tissue interface based on finite element method

T.m. Choi^*, Wei Dian Lai, Sih Sian Lee

^*Corresponding author for this work

Institute of Biomedical Engineering

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

This paper proposes to use a new and realistic finite element model of a single turn human cochlea and cochlear implant electrode array with electrode-tissue interface to model the electric field imaging technique, which creates an impedance matrix. Due to discrepancy in the Warburg capacitor in the active and nonactive electrode contacts and electric power lost along the cochlea, the diagonal terms of the impedance matrix is larger than the off diagonal terms, which represent the impedance values of the nonactive electrode contacts. The impedance matrix from electric field imaging measurements is compared with the simulation results.

Original language	English
Pages (from-to)	1375-1378
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	42
Issue number	4
DOIs	https://doi.org/10.1109/TMAG.2006.872461
State	Published - Apr 2006

Keywords

Cochlear implant
Electric field imaging
Finite element method
Tissue-interface model
Volume conduction model

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10.1109/TMAG.2006.872461

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abstract = "This paper proposes to use a new and realistic finite element model of a single turn human cochlea and cochlear implant electrode array with electrode-tissue interface to model the electric field imaging technique, which creates an impedance matrix. Due to discrepancy in the Warburg capacitor in the active and nonactive electrode contacts and electric power lost along the cochlea, the diagonal terms of the impedance matrix is larger than the off diagonal terms, which represent the impedance values of the nonactive electrode contacts. The impedance matrix from electric field imaging measurements is compared with the simulation results.",

keywords = "Cochlear implant, Electric field imaging, Finite element method, Tissue-interface model, Volume conduction model",

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AB - This paper proposes to use a new and realistic finite element model of a single turn human cochlea and cochlear implant electrode array with electrode-tissue interface to model the electric field imaging technique, which creates an impedance matrix. Due to discrepancy in the Warburg capacitor in the active and nonactive electrode contacts and electric power lost along the cochlea, the diagonal terms of the impedance matrix is larger than the off diagonal terms, which represent the impedance values of the nonactive electrode contacts. The impedance matrix from electric field imaging measurements is compared with the simulation results.

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KW - Electric field imaging

KW - Finite element method

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KW - Volume conduction model

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A novel approach to compute the impedance matrix of a cochlear implant system incorporating an electrode-tissue interface based on finite element method

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Keywords

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