Betz, V.V.Betz2022-03-082022-03-081996https://publica.fraunhofer.de/handle/publica/303364The invention relates to a device for the diagnosis of body tissue or specimens, comprising a device for supplying oxygen, or oxygen-enriched air or a gas containing a higher or lower proportion of oxygen than air, to the tissue or specimen to be examined, a device for illuminating the tisue and a device for examining the image of the tissue or the specimen, and an evaluating device.de608610620patent1994-4433123