Radiation oncology is a medical speciality 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.
You may call them simply doctors. But most doctors have extra expertise in one type of medicine or another. In fact, there are several hundred medical specialties and subspecialties. Here are the most common types of doctors you'll likely see.