TomoTherapy Selected by Premier Healthcare Alliance, Premier Purchasing Partners, LP. for Supply Agreement

MADISON, WI--(Marketwire - June 29, 2010) - TomoTherapy Incorporated (NASDAQ: TOMO), maker of advanced radiation therapy solutions for cancer care, announced today that it has signed an equipment supply group purchasing agreement with Premier Purchasing Partners, L.P., the group purchasing unit of Premier, Inc. The agreement provides TomoTherapy greater reach into Premier’s not-for-profit hospitals and health centers, which includes 2,300 U.S. hospitals and more than 67,000 other healthcare facilities, while enabling Premier members to access special pricing and terms for innovative radiation oncology solutions and establishing a streamlined purchasing solution for them.

TomoTherapy’s radiation therapy solutions enable high treatment quality for a broad patient population, with capabilities to treat cancers throughout the body.

“We are pleased to be partnering with Premier, the leading group purchasing organization serving not-for-profit healthcare institutions,” said Fred Robertson, TomoTherapy CEO. “In addition to providing TomoTherapy expanded reach through Premier’s network, this agreement will offer Premier’s members better access to highly precise cancer treatment solutions.”

About Premier Healthcare Alliance
Premier is a performance improvement alliance of more than 2,300 U.S. hospitals and 67,000-plus other healthcare sites working together to achieve high quality, cost-effective care. Owned by not-for-profit hospitals, Premier maintains the nation’s most comprehensive repository of clinical, financial and outcomes information and operates a leading healthcare purchasing network. A world leader in helping deliver measurable improvements in care, Premier works with the Centers for Medicare & Medicaid Services and the United Kingdom’s National Health Service North West to improve hospital performance. Headquartered in Charlotte, N.C., Premier also has offices in San Diego, Philadelphia and Washington. http://www.premierinc.com.

About TomoTherapy Incorporated
TomoTherapy Incorporated develops, markets and sells advanced radiation therapy solutions that can be used to treat a wide variety of cancers, from the most common to the most complex. The ring gantry-based TomoTherapy® platform combines integrated CT imaging with conformal radiation therapy to deliver sophisticated radiation treatments with speed and precision while reducing radiation exposure to surrounding healthy tissue. TomoTherapy’s suite of solutions include its flagship Hi Art® treatment system, which has been used to deliver more than three million CT-guided, helical intensity-modulated radiation therapy (IMRT) treatment fractions; the TomoHD™ treatment system, designed to enable cancer centers to treat a broader patient population with a single device; and the TomoMobile™ relocatable radiation therapy solution, designed to improve access and availability of state-of-the-art cancer care. TomoTherapy’s stock is traded on the NASDAQ Global Select Market under the symbol TOMO. To learn more about TomoTherapy, please visit TomoTherapy.com.

©2010 TomoTherapy Incorporated. All rights reserved. TomoTherapy, Tomo, TomoDirect, TQA, the TomoTherapy logo and Hi--Art are among trademarks, service marks or registered trademarks of TomoTherapy Incorporated in the United States and other countries.