7. Approximately 2 weeks after completing all the consultation appointments and obtaining the imaging for treatment planning, the single stereotactic radiation treatment will be performed. The SRS procedure takes approximately 2.5 hours. It is entirely outpatient and does not require anesthesia. The procedure is noninvasive and painless (X-ray treatment). During the entire treatment, the head is held tightly in the plastic mask. Oral anti-anxiety medication may be given to relax the patient.