American Shared Hospital Services announced that physicians have begun treating patients with the Gamma Knife Perfexion system AMS supplied to Methodist Hospitals, Merrillville, Indiana. The initiation of Gamma Knife Perfexion treatments at Methodist Hospitals – Southlake Campus, upgrading their program that was first introduced over 15 years ago. With the new system, Methodist’s brain tumor, trigeminal neuralgia and vascular malformation patients will benefit from the Gamma Knife Perfexion’s documented clinical efficacy.