Source:http://linkedlifedata.com/resource/umls/id/C1520143
NCI: A type of external radiation therapy used to treat patients who have cancer in the brain. It is often used to treat patients whose cancer has spread to the brain, or who have more than one tumor or tumors that cannot be removed by surgery. Radiation is given to the whole brain over a period of many weeks.,NCI: Radiation treatment modality used as major component in treatment of primary and metastatic brain tumors. This is a standard treatment for multiple brain metastases.