With today's focus on targeted and minimally invasive therapies, photodynamic therapy (PDT) is now being studied and used to combat many disease states and to investigate critical biological questions. This groundbreaking resource brings practitioners and researchers the latest advances in photodynamic therapy and offers a solid understanding of the design, delivery and dosimetry of the three basic ingredients of PDT - photosensitisers, light and oxygen. The book covers novel areas of mechanistic and innovative translational approaches. Moreover, it presents an overview of the important medical applications of PDT, including approved treatments, clinical trials, and investigated therapies for cancer and non-malignant diseases.