A method of, and apparatus for, identifying human tissue which is suspected of being physiologically changed as a result of commencement of neoplastic activity or pre-activity, is disclosed. The tissue is preferably irradiated with light at wavelengths of 660 nm and 940 nm. The magnitudes of the reflected,...http://www.google.fr/patents/US5036853?utm_source=gb-gplus-shareBrevet US5036853 - Physiological probe
