Radiation Oncology: is a medical specialty that involves the controlled use of radiation to treat cancer either for cure, or to reduce pain and other symptoms caused by cancer. Radiation therapy (also called radiotherapy) is the term used to describe the actual treatment delivered by the radiation oncology team. Three unique specialist professions are involved in the practice of radiation oncology: Radiation Oncologists, Radiation Therapists and Radiation Oncology Medical Physicists. These highly trained professionals use advanced technologies to deliver safe and effective radiation therapy to cancer patients with as few side effects as possible. Radiation therapy is a part of treatment in around 40% of all patients cured of cancer.