Radiation oncology, also known as radiation therapy, is a type of cancer treatment that uses high-energy radiation to kill cancer cells. There are several synonyms for this term, including radiotherapy, radiation treatment, and radiation therapy. Other related terms include brachytherapy, which involves placing radiation sources directly into or near the tumor, and proton therapy, which uses high-energy protons to destroy cancer cells. In some cases, radiation therapy may be combined with other forms of cancer treatment, such as chemotherapy or surgery, to provide the best possible outcome for the patient. Regardless of the terminology used, radiation oncology is an important tool in the fight against cancer and can make a significant difference in the lives of those affected.