A non-invasive medical imaging technique capable of evaluating, in situ, the oxygenation state of body tissues (e.g., by measuring the spectral properties of heme proteins) is described. The technique is based on the measurement of scattered radiation in the near-infrared region (NIR), where significant...http://www.google.es/patents/US5137355?utm_source=gb-gplus-sharePatente US5137355 - Method of imaging a random medium
