PDD is particularly effective in diagnosing cancers that are difficult to detect using conventional imaging techniques. It is commonly used for: - Bladder Cancer: PDD can improve the detection of bladder tumors, especially non-muscle invasive bladder cancer. - Brain Tumors: Intraoperative PDD helps neurosurgeons distinguish between tumor tissue and normal brain tissue during surgery. - Skin Cancer: PDD assists in identifying superficial skin cancers such as basal cell carcinoma and squamous cell carcinoma.