Health Library

Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Radiation therapy

Radiation therapy is the use of high-energy radiation, such as X-rays, to destroy cancer cells and shrink tumors. Radiation may come from a machine outside the body (external radiation therapy). Radiation can also be given from inside your body (internal radiation therapy). For example, brachytherapy uses radiation implants that are placed in or near the cancer. Systemic radiation therapy is given by a pill or injection. And intraoperative radiation therapy is given inside the body during an operation.

Radiation therapy is standard treatment for many types of cancer. It may be used in combination with other treatments, such as surgery, chemotherapy, or immunotherapy.