New rate boosts prospects for AMS proton centers

"We are pleased that CMS recognizes the therapeutic value of proton therapy, now widely regarded as the optimal radiation treatment for an increasing variety of cancers. This payment increase will facilitate the development of much-needed proton therapy centers throughout the country," said AMS Chairman and Chief Executive Officer Ernest A. Bates, M.D.

AMS is developing hospital based proton therapy centers in Dayton, Ohio (Kettering Medical Center), Boston (Tufts Medical Center), Orlando (Orlando Regional Healthcare) and Long Beach, California (Long Beach Memorial Medical Center).

About AMS

American Shared Hospital Services provides turnkey technology solutions for advanced radiosurgical and radiation therapy services. AMS is the world leader in providing Gamma Knife radiosurgery equipment, a non-invasive treatment for malignant and benign brain tumors, vascular malformations and trigeminal neuralgia (facial pain).

The Company also offers the latest IGRT and IMRT systems, as well as its proprietary Operating Room for the 21st Century® concept. Through its preferred stock investment in Mevion Medical Systems, Inc., formerly Still River Systems, AMS also plans to complement these services with the MEVION S250 proton beam radiation therapy (PBRT) system, which has not yet been approved by the FDA.

Safe Harbor Statement

This press release may be deemed to contain certain forward-looking statements with respect to the financial condition, results of operations and future plans of American Shared Hospital Services, which involve risks and uncertainties including, but not limited to, the risks of the Gamma Knife and radiation therapy businesses, the risks of developing The Operating Room for the 21st Century program, and the risks of investing in a development-stage company, Mevion Medical Systems, Inc., without a proven product.

Further information on potential factors that could affect the financial condition, results of operations and future plans of American Shared Hospital Services is included in the filings of the Company with the Securities and Exchange Commission, including the Company's Annual Report on Form 10-K for the year ended December 31, 2010, the Quarterly Report on Form 10-Q for the quarter ended March 31, 2011, Form 10-Q and 10-Q/A for the quarter ended June 30, 2011, and the definitive Proxy Statement for the Annual Meeting of Shareholders held on June 9, 2011.

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