... semi-conductor laser therapeutic apparatus as excitation light source for PDT, the wavelength of 635nm, output power is 400mw, in a ... 5 - Aminolevulinic acid hydrochloride (5-ALA) for photosensitive drugs PDT course of treatment, through exposure to contain a large number ... , and give full play to the selective killing effect of PDT, not harm normal tissues. This treatment method is simple, specific ...