Haematoporphyrin-derivative fluorescence in vitro and in an animal tumour

Abstract
Experiments are presented on the presented on the fluorescent properties of haematoporphyrin-derivative (HPD) in vitro and in an animal tumour. The experiments show that, firstly, an argon laser can be used as an effective excitation source and, secondly, that the in vivo fluorescence spectrum is different from that in vitro.