Photodynamic therapy (PDT) utilizes light-activated catalysts, or photosensitizers, to produce reactive oxygen species (ROS) that can destroy cancer cells. The photosensitizer is administered to the patient and accumulates in cancer cells. When exposed to a specific wavelength of light, the photosensitizer generates ROS, leading to cell death. PDT is highly specific, as the activation only occurs where the light is directed.
