A method of analyzing tissue includes inserting a radiation source into tissue, impinging radiation upon the tissue, obtaining a sample signal of the radiation that impinges upon the tissue, and determining a refractive index of the tissue from the sample signal. The method may also include determining...http://www.google.de/patents/US7787129?utm_source=gb-gplus-sharePatent US7787129 - Method and apparatus for measurement of optical properties in tissue
