Method:The photodynamic cytotoxicity of human bladder cancer cells(T-24 and SCaBER) was studied by MTT rapid colormetric assay referring to different CPD 4 concentration,laser energy and wavelength.

• 方法：采用MTT比色分析法判别体外人膀胱癌T－24和SCaBER细胞对不同的激光波长、能量和CPD4浓度的光敏效应。