title: General principles of radiation and chemoradiation.
abstract: High-resolution, three-dimensional functional imaging has improved delivery of radiotherapy to tumors while minimizing damage to adjacent, healthy tissue. A growing array of energy sources and delivery systems, including external delivery of protons and brachytherapy, are also credited with improvement in the therapeutic index of treating diseases with radiation. In many malignancies, the therapeutic effects of radiotherapy can be significantly augmented by coordinated delivery of adjunctive therapies, particularly chemotherapy. In age-related macular degeneration (AMD) and other diseases of the eye, radiotherapy combined with pharmaceutical agents, including antiangiogenesis therapies, have the potential to an additive or synergistic effect. In AMD, the most significant challenge for radiotherapy may be precise delivery to the target and avoidance of damage to surrounding tissues.
authors: Department of Radiation Oncology, the University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA. hahn@xrt.upenn.edu
authors: Stephen M
authors: SM
authors: Hahn
authors: Amit
authors: A
authors: Maity
mesh_terms: D020533:Angiogenesis Inhibitors / Q000627:therapeutic use; D000818:Animals; D003131:Combined Modality Therapy; D005134:Eye Neoplasms / Q000188:drug therapy / Q000532:radiotherapy; D006801:Humans; D008268:Macular Degeneration / Q000188:drug therapy* / Q000532:radiotherapy*; D011878:Radiotherapy / Q000379:methods
chemical_list: D020533:Angiogenesis Inhibitors