Radiation therapy is used to treat most cancers and simplicity cancer signs and symptoms. while used to treat cancer, radiation therapy can therapy most cancers, save you it from returning, or stop or gradual its boom. when remedies are used to ease symptoms, they are called palliative treatments. Radiation therapy or radiotherapy, often abbreviated RT, RTx, or XRT, is a therapy the use of ionizing radiation, typically as a part of cancer remedy to manipulate or kill malignant cells and typically brought with the aid of a linear accelerator.