FAST IN-VIVO MEASUREMENTS OF LOCAL TISSUE IMPEDANCES USING NEEDLE ELECTRODES

The objective of the research is to show an in vivo, fast method of me asurement of local tissue bio-impedance in the beta dispersion region (0-200 kHz). A needle electrode is used for the purpose. The performan ces with respect to circuits, electrodes, measurement area and electri cal representations are evaluated. A measurement example is shown, and the electrical representations are discussed and compared using it. T he method discussed, although invasive, is considered to be useful for local tissue diagnoses concerning structures and physiological functi ons.