Radiation oncology (radiotherapy/radiation therapy) is a cancer treatment that employs high-energy beams to destroy cancer cells. It works by delivering high-energy x-rays (photons) through a linear accelerator. These painless and undetectable therapeutic x-rays are used to treat a variety of malignancies.
The most prevalent type of radiation therapy is external beam radiation therapy. During this type of radiation, high-energy beams originate from a machine outside of your body that targets the beams at a specific location on your body. Brachytherapy is a type of radiation treatment that delivers radiation directly to your body (brak-e-THER-uh-pee).