DEVICE FOR PHOTODYNAMIC DIAGNOSIS

摘要

The invention relates to an endoscopic or microscopic device for diagnosis by means of a reaction in vivo in biological tissue, induced by light using a photosensitizer or caused by auto-fluorescence. The inventive device is characterized in that there is at least one reference wavelength ( lambda r) which is at the most 2 DELTA lambda greater or less than the intersection point wavelength ( lambda s), and to which the following therefore applies: lambda s - 2 DELTA lambda 10 %; |T1( lambda R+ DELTA lambda ) - T1( lambda R+3 DELTA lambda )| < 5 %, preferably < 3 %; T1( lambda r+ DELTA lambda > 0,5 %; T1( lambda r- DELTA lambda ) > 0,5 %; T1( lambda r-2 DELTA lambda ) > 0,5 %; T1( lambda + DELTA lambda ) > 0,3 %; T1( lambda r+3 DELTA lambda ) > 0,3 %; with 4nm < DELTA lambda < 6nm.