SAN FRANCISCO--(BUSINESS WIRE)--AMERICAN SHARED HOSPITAL SERVICES (AMEX:AMS) (PCX:AMS), a leading provider of turnkey technology solutions for advanced radiosurgical and radiation therapy services, announced today that it has ordered four Leksell Gamma Knife® Perfexion™ systems from Elekta AB (Stockholm Stock Exchange:EKTAb) for planned upgrades of AMS clinical partner sites in the United States.
