... light source for PDT, the wavelength of 635nm, output power is 400mw, in a 5 - Aminolevulinic acid hydrochloride (5-ALA) for ... drugs PDT course of treatment, through exposure to contain a large number of the lesions photosensitizer to produce sufficient quantities ... good, simple, intelligent, stable and secure, more importantly, increased power to choose treatment, time is short and quick results. The ...