光动力学治疗(photodynamic therapy,PDT)是一种新颖的治癌方法,与其他肿瘤疗法相比,PDT具有独特的优势。其包含了3个可变参数[1]:光敏剂、光源以及组织中分子态氧,三者缺一不可。PDT时,光敏剂能在肿瘤细胞内选择性聚积;将合适波长的激光照射肿瘤后,光敏剂激发并发生光化学反应 Photodynamic therapy (PDT) is a novel cancer-fighting approach that offers unique advantages over other cancer therapies. It contains three variable parameters [1]: photosensitizers, light sources and molecular oxygen in the tissue, the three are indispensable. PDT, the photosensitizer can selectively accumulate in tumor cells; the appropriate wavelength laser irradiation tumor, the photosensitizer excited and photochemical reactions