Tissue Characterisation using an Impedance Spectroscopy Probe (original) (raw)

Electrical Impedance Spectroscopy (EIS) involves the injection of a constant current into tissue at different frequencies and measurement of the resultant voltages. The transfer impedance is then calculated, fitted to an appropriate model and parameters are extracted to describe the electrical properties of the tissue. This technique has been used for characterising oesophageal and cervical tissue. However, electrode/tissue interface impedance and tissue inhomogeneities limit the consistency of the technique. The objective of this research is to optimise the ability of a tetrapolar impedance probe to characterise tissue in terms of electrical impedance spectra.