Patients scheduled for SRS will have their scalp numbed with medicine and their head will be placed in a head frame. A CT scan will be done on the morning of the procedure to plan the treatment. Around noon, the treatment, which consists of brief exposures to radiation, will be administered with the patient positioned comfortably on a treatment couch. The treatment will be completed in 1 to 2 hours, after which the head frame will be removed. After a brief period of observation, the patient will be discharged home.