AMERICAN SHARED HOSPITAL SERVICES (NYSE MKT:AMS), a leading provider of turnkey technology solutions for advanced radiosurgical and radiation therapy services, today shared an announcement from Mevion Medical Systems, developer of the MEVION S250 Proton Therapy System for cancer treatment, that the world’s first MEVION S250 proton therapy treatment has been delivered to a patient at Barnes-Jewish Hospital in St. Louis. AMS Chairman and Chief Executive Officer Ernest A. Bates, M.D., said, "Treatment of the first patient on the MEVION S250 Proton Therapy System is a major step in increasing the availability of this cutting-edge cancer fighting technology. Until now, widespread adoption of proton therapy has been limited by the high capital and operating costs of conventional systems. Because of its significantly lower capital and operating costs, we believe many leading cancer centers will now consider providing proton therapy with the MEVION S250 system. AMS’s proven financing model can help make this happen. AMS’ first MEVION S250 system is under installation at Orlando Health in Orlando, FL. We currently have commitments for two additional MEVION S250 systems and anticipate that we will place many more orders." AMS owns an equity interest in Mevion, and will supply a MEVION S250 for the proton center now under construction at Orlando Health, in addition to other projects under development: World’s First MEVION S250 Proton Therapy Treatment Delivered at Barnes-Jewish Hospital Landmark event represents a new era in radiation therapy. ST. LOUIS, M.O., December 19, 2013 -- A patient with a rare type of cancer called chondrosarcoma at the base of the skull has become the first person in the world to receive proton therapy using the revolutionary MEVION S250 Proton Therapy System from Mevion Medical Systems, Inc. of Littleton, MA. Radiation oncologists at the Siteman Cancer Center at Barnes-Jewish Hospital and Washington University School of Medicine in St. Louis delivered the treatment. The S. Lee Kling Proton Therapy Center at Barnes-Jewish Hospital is home to the MEVION S250, a unique proton therapy device designed to deliver the same precise, non-invasive treatments delivered by conventional proton systems but with a greatly reduced physical footprint, streamlined clinical workflow, and significantly lower implementation and operational costs.