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ApplicationNo. 398365 filed on 08/24/1989
US Classes:600/342, Light conducting fiber inserted in body600/475, With comparison means (e.g., ratio of or comparison to a standard)600/478Light conducting fiber inserted into a body
ExaminersPrimary: Cohen, Lee S.
Assistant: Zele, John D.
Attorney, Agent or Firm
Foreign Patent References
International ClassA61B 005/00
Foreign Application Priority Data1988-08-26 AU
AbstractA 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, or non-absorbed, light at the two wavelengths is compared, preferably after being normalized by the magnitude of ambient light reflected from the tissue immediately prior to each measurement. The invention finds application in detecting cervical lesions but is also applicable to endoscope inspectable tissues such as the lungs and alimentary canal tissues.