... is systemic administation of a photo sensitiser, which a stimulated by photon, chemical and biologic process. PDT can treat a wide range of skin ... from US.5.Be proven to be 100% safe and highly effective, with a timer system,6..No UVA, No UVB, No ... ,7.Strong lighting energy, intensive penetration, big spot size, and short treatment time applicable for any characteristics of skin,8.Light sources ...