The branch of Oncology dealing with Radiation therapy is called as Radiation Oncology. Radiation oncology is a medical felid that involves the controlled usage of radiation to treat cancer for cure or to reduce the pain and other symptoms caused by cancer. Radiation therapy which is also called radiotherapy is the term used to describe the definite treatment delivered by the radiationoncology team. Three unique specialist professions in the field os radiation oncology perform the practice: Radiation Oncologists which are doctors, Radiation Therapists and Radiation Oncology Medical Physicists. These are highly trained medical professionals who uses the advanced technologies to deliver safe and effective radiation therapy to cancer patients in which few side effects as possible.