This typically takes one to two hours to complete. Once the individualized treatment plan is completed, the patient is placed on the Gamma Knife couch. The stereotactic frame is attached to the collimator helmet containing the 201 portals through which the radiation beams are focused and set to the target coordinates. After all stereotactic coordinates are checked, the couch is moved into the unit by an electrical motor and treatment begins. During the treatment, there is no noise and the patient feels no pain.
Communication is maintained with the patient at all times via video cameras and an intercom.
Treatment time typically varies between 20 minutes and two hours depending on the complexity of the treatment plan and number of isocenters required. At the conclusion of the treatment, the stereotactic frame is removed and the patient is sent to his or her room after a brief period of observation. Occasionally, patients are observed overnight before being discharged and sent home. They can return to work and full activity the next day.