Gamma Knife
What Is Gamma Knife
A type of radiosurgery (radiation therapy) machine that acts by focusing low-dosage gamma radiation from many sources on a precise target. Areas adjacent to the target receive only slight doses of radiation, while the target gets the full intensity.
The gamma knife may be used to treat brain tumors, metastatic tumors in the brain (from sites such as the breast, lung, and skin), vascular malformations of the brain, acoustic neuromas (a tumor of the hearing nerve); meningiomas (tumors on the protective layers of the brain); trigeminal neuralgia causing severe facial pain; and temporal lobe epilepsy…
What to Expect During Gamma Knife™ Treatment
Preparation
Patients are admitted to Hospital in the morning of the procedure. Like most surgical procedures, patients wear a hospital gown and remove jewelry, eyeglasses, contact lenses, dentures, wigs or hairpieces. Patients will receive a mild sedative through an IV…
Headframe application
Patients are fitted for a lightweight frame which holds the head still during the procedure. A local anesthetic is injected in the four areas where the frame is attached to the head with mounting pins. Patients feel slight pressure during the headframe application, but this sensation usually goes away when the headframe is in place. Patients are able to move their heads after the headframe is applied…
Imaging to pinpoint the target
This may include CT (computed tomography), MRI (magnetic resonance imaging) and cerebral angiography. Patients may have had these studies performed before, but they must be repeated with the headframe in place to precisely map the area to be treated…
Computerized dose planning
Physicians use computers to plan the radiation so it matches the desired target. Dose planning generally takes less than one hour…
Treatment
when the radiation plan is ready, patients lie on the Gamma Knife™ couch and are positioned into a guiding device that holds their heads securely in the Gamma Knife™ helmet.
After patients are in position, the staff goes into an adjoining room to monitor the procedure with video cameras and an intercom system. Patients can talk to the physicians and nurses during the procedure. The number of minutes that each radiation dose lasts is determined during dose planning. The procedure usually includes multiple doses that are delivered one after the other, all on the same day…
Benefits of the Gamma Knife
The benefits of the Gamma Knife impact all concerned; physicians, patients, hospitals and society as a whole. These benefits are derived from its unique non-invasive nature, minimal hospitalization requirements, affordable cost and impressive long-term results…
No Hair Loss or Scarring
Gamma Knife radiosurgery treatment is specifically designed to protect the patient from diffuse exposure to radiation, avoiding disfigurement and scarring problems associated with neurosurgery.
Reduced Cost
Radiosurgery provides a cost savings of an estimated 20 to 50 percent when compared to conventional surgery.