Analysis of systematic errors in the electrical impedance measurement of tissue characteristics during an in-vitro study in the frequency range 1 KHz to 4 MHz

Tunstall, B., Wang, W., Cheng, Z., McCormick, M. and Rew, David (1997) Analysis of systematic errors in the electrical impedance measurement of tissue characteristics during an in-vitro study in the frequency range 1 KHz to 4 MHz. In Proceedings of 1997 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE. pp. 860-862 .

Abstract

This paper describes some of the important systematic errors associated with an in-vitro study, using a four electrode impedance system, into the characteristics that allow for differentiation between normal and abnormal tissues. The impact of system parameters were investigated though the use of saline-filled phantoms and tissue samples. The latter being provided as part of a 100 patient in-vitro study carried out in collaboration with the Glenfield General Hospital, Leicester, UK. It has been found necessary to provide an environment with a known, and calibrated, post sample excision period. However, the orientation of the tissue during the measurement was also found to have a large and important impact upon the measured impedance.

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Contributors

Author: David Rew

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