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Basics of Numerical Simulations of Bioimpedance Phenomena

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Bioimpedance in Biomedical Applications and Research

Abstract

Bioimpedance measurement technique is based on injecting AC current into a biological material and from comparison of voltage and current signals (amplitude and phase) extract (bio)impedance between the electrodes. Several details such as electrode shape, positioning and their electrical properties, and electrical and geometrical properties of the measured biological materials influence the measurements. Many of these influences can be foreseen and analyzed by performing a numerical simulation of AC current conduction through the analyzed structure. Usually it is sufficient to numerically solve Poisson equation for complex potential by taking into account appropriate boundary conditions and material parameters (both dielectric and conductive) and from known potential distribution extract other quantities of interest such as electric field, current density, current through the electrodes, complex power, and finally (bio)impedance. For basic demonstration purposes, free computer simulation tools can be used to perform this task as presented in this chapter by introducing free simulation software FEMM.

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Correspondence to Dejan Križaj .

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Križaj, D. (2018). Basics of Numerical Simulations of Bioimpedance Phenomena. In: Simini, F., Bertemes-Filho, P. (eds) Bioimpedance in Biomedical Applications and Research. Springer, Cham. https://doi.org/10.1007/978-3-319-74388-2_7

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  • DOI: https://doi.org/10.1007/978-3-319-74388-2_7

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  • Publisher Name: Springer, Cham

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