AMERICAN SHARED HOSPITAL SERVICES (NYSE AMEX:AMS), a leading provider of turnkey technology solutions for advanced radiosurgical and radiation therapy services, announced today that the Gamma Knife® system it supplied to Baskent University, Adana, Turkey under a contract announced in March 2011 has begun treating patients, including 11 patients treated in just the first week of clinical operations–the highest start-up volume of any Gamma Knife in AMS' 20-year history. The Kisla Campus of Baskent University houses the largest and most modern oncology center in the Adana region, now including both a Gamma Knife and two linear accelerator devices used for radiation therapy. Baskent University has a total of 561 hospital beds. AMS Chairman and Chief Executive Officer Ernest A. Bates, M.D., said, "Turkey is the fastest growing economy in Europe and the third fastest growing economy in the world behind only China and India. Given the small number of radiosurgery devices and services in the country today, and the fact that more than 90% of the population of 77 million is covered by health insurance, Turkey represents a significant growth opportunity for AMS. Together with our partner EMKA LLC, an affiliate of Ankara-based ÖZYÜREK A.Ş., Elekta's distributor in Turkey for the past twenty five years, we are committed to pursuing this opportunity aggressively." About Gamma Knife Surgery Gamma Knife surgery, sometimes referred to as stereotactic radiosurgery (SRS), is a non-invasive method for treating brain disorders. It is the delivery of a single, high dose of radiation to a small and critically located intra-cranial volume through the intact skull. It is preferred for its extreme accuracy, efficiency and outstanding therapeutic response. Today, Gamma Knife surgery is performed in hundreds of leading hospitals and clinics around the world. Approximately 50,000 patients undergo Gamma Knife surgery every year, and this unique procedure has an impressive scientific track record with thousands of peer-reviewed articles. No other non-invasive treatment method in this field has greater clinical acceptance.