A device and method for noninvasive depth-selective detection and characterization of surface phenomena in organic and biological material such as tissues by surface measurement of the electrical impedance of the material. The device includes a probe with a plurality of measuring electrodes separated...http://www.google.fr/patents/US5353802?utm_source=gb-gplus-shareBrevet US5353802 - Device for measurement of electrical impedance of organic and biological materials
Device for measurement of electrical impedance of organic and biological ...
