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The influence of measurement frequencies on the accuracy of tissue impedance parametric modeling

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2 Author(s)
Kun, Stevan ; Dept. of Biomed. Eng., Worcester Polytech. Inst., MA, USA ; Peura, R.A.

The study was performed as a part of research to develop an electrical impedance spectroscopic system for muscle tissue ischemia estimation. Results of simulations done to determine the measurement frequencies that provide optimal extraction of tissue electrical impedance model parameters from electrical impedance spectra are presented. Measurement frequency sets that are logarithmic, quasilinear, and frequency sets that produce angularly equidistant points on the Nyquist loci, were tested with a tissue impedance model extraction algorithm which calculates R0, R, α, and τ tissue parameters from complex impedance spectra. The results show that the measurement frequency set which best estimates: R0 should include the decade from 100 Hz-1 kHz; R should not include frequencies under 1 kHz; α and τ should be equidistantly spaced on the Nyquist locus. Using two sets of measurement frequencies, one to estimate R0, and the other for R, α, and τ, provides the best overall performance

Published in:

[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint  (Volume:2 )

Date of Conference:

Oct 1999