Gamma Knife radiosurgery is a way to treat brain tumors and certain other brain diseases (arteriovenous malformations, trigeminal neuralgia, acoustic neuromas, certain functional disorders and others) without a scalpel or incision.  Gamma Knife treatment is a one-day, out-patient procedure which is virtually painless.  This technology delivers a high dose of radiation to a small target within the brain.  It is not necessary to shave the patient's head.  If you have questions, call Dr. Paul Sperduto at 952-442-6000.