AMERICAN SHARED HOSPITAL SERVICES REPORTS FIRST QUARTER RESULTS San Francisco, CA

AMERICAN SHARED HOSPITAL SERVICES

REPORTS FIRST QUARTER RESULTS

San Francisco, CA, May 14, 2007 AMERICAN SHARED HOSPITAL SERVICES (AMEX:AMS), a leading provider

of turnkey technology solutions for advanced radiosurgical and radiation therapy services, today

announced financial results for the first quarter of 2007.

First Quarter Results

For the three months ended March 31, 2007, revenue decreased to $4,749,000 from $5,045,000 as

patient volume for this year s first quarter was below the record volume experience in last year s

first quarter. This primarily reflected downtime required for cobalt reload at one of the

Company s centers and personnel shortages at another center. The reload has been completed and the

staffing issues have been resolved, and these issues are not expected to affect patient volume in

the current quarter. Gross margin was 47% for this year s first quarter versus 48% for the prior

Selling and administrative expenses increased to $1,161,000 for the first quarter of 2007 compared

to $914,000 for the first quarter of 2006. A significant part of this increase is related to the

Company s development of its proton beam radiation therapy (PBRT) business.

Operating income for the first quarter of 2007 decreased to $602,000 compared to $946,000 for the

first quarter of 2006. Net income for the three months ended March 31, 2007 was $225,000, or $0.04

per diluted share. This compares to net income for the three months ended March 31, 2006 of

$436,000, or $0.09 per diluted share.

At March 31, 2007, AMS reported cash, cash equivalents, and short and long-term securities of

$8,916,000. At December 31, 2006, AMS reported cash, cash equivalents and short and long-term

securities of $8,906,000. Shareholders equity at March 31, 2007 was $19,010,000 compared to

$19,009,000 at December 31, 2006.

Chairman and Chief Executive Officer Ernest A. Bates, M.D., said, We are devoting the management

resources and marketing dollars required to build the foundation for sustained long-term growth.

We are committed to our strategy to leverage AMS creative financing solutions by offering our

clinical partners the latest technology solutions for radiation oncology delivery. We currently

are developing additional agreements to provide clients with advanced radiation therapy devices as

part of a radiation therapy department upgrade, including additional PBRT systems, Leksell Gamma

Knife Perfexion systems, and other radiosurgery devices.

We continue to expect our agreement with Tufts-NEMC to provide an image-guided radiation therapy

(IGRT) system, a CT Simulator, and related service, support and maintenance services to contribute

to our operating results beginning in the fourth quarter, and to begin upgrading clinical partner

sites later this year with the four Leksell Gamma Knife Perfexion systems we ordered from Elekta AB

in 2006. We also expect to commence our lease agreements with Tufts-NEMC and M. D. Anderson Cancer

Center Orlando for the Clinatron 250 PBRT system in 2009, subject to FDA approval.

The Clinatron 250, currently under development by Still River Systems, is a single-treatment-room

PBRT system incorporating proprietary technology that Still River believes may dramatically reduce

the cost of implementing proton beam radiation therapy. In April 2006, AMS invested $2 million for

an equity interest in Still River Systems and acquired an option to purchase two PBRT systems. AMS

exercised this purchase option in February 2007.

Earnings Conference Call

American Shared has scheduled a conference call at 1:00 p.m. PT (4:00 p.m. ET) today. To

participate in the live call, dial (800) 588-4973 at least 5 minutes prior to the scheduled start

time. A simultaneous WebCast of the call may be accessed through the Company s website,

www.ashs.com, or through CCBN, www.earnings.com (individual investors) or

www.streetevents.com (institutional investors). A replay will be available for 30 days at

these same internet addresses, or by calling (888) 843-8996, pass code 17904583.

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

services, 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 equity

investment in Still River Systems, AMS also plans to complement these services with the Clinatron

250 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

business, the risks of developing its IMRT and The Operating Room for the 21st Century

programs, and the risks of investing in a development-stage company, Still River 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, 2006, and the definitive Proxy Statement

for the Annual Meeting of Shareholders to be held on June 14, 2007.

AMERICAN SHARED HOSPITAL SERVICES

Selected Financial Data