NEAR-INFRARED RADIATION FOR DIAGNOSIS OF TISSUE

The application of Near-Infrared Radiation provides the physician with a method of reaching a specific and non-invasive examination of inter nal body parts: Without addition of a contrast medium, the distributio ns of local haematocrit, namely the structures of mainly subcutaneous bloodvessels, can be shown with continuity and good definition in the regions of focus (NIR-Microangiopathy, especially for peripheral body sections). This paper introduced a transmission method able to penetra te even thick sections (>30 mm). A new, simple method to evaluate refl ected NIR parts permits a non-invasive and exact localization of inhom ogeneities in organic substances of certain consistency (for instance milk and blood) up to depth of 20 mm.