TomoTherapy to Host Analyst and Investor Presentation at 2008 ASTRO Meeting in Boston

Business Wire, August 19, 2008

MADISON, Wis. -- TomoTherapy Incorporated (NASDAQ: TOMO), producer of the HioArt([R]) treatment system for advanced radiation therapy, announced today that it will host an analyst and investor presentation in conjunction with the 50th annual ASTRO (American Society for Therapeutic Radiology and Oncology) meeting on Monday, Sept. 22, 2008, at 7:45 a.m. ET.

Analysts and institutional investors are invited to register for this event by visiting: http://pub.psbpr.com/TomoTherapyInc/evite7-2008/. Space is limited and early registration is advised.

TomoTherapy's management team will present an update on its business and highlights of the HioArt system. The company's presentation will be Webcast. To access the live Webcast on Sept. 22, 2008, go to the Investor Relations page of TomoTherapy.com and click on the Webcast icon. A replay of the Webcast will be available beginning at 10:00 a.m. ET on the same day.

About TomoTherapy Incorporated

TomoTherapy Incorporated has developed, markets and sells the TomoTherapy([R]) HioArt([R]) treatment system, an advanced radiation therapy system for the treatment of a wide variety of cancers. The HioArt treatment system 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. The company's stock is traded on the NASDAQ Global Select Market under the symbol TOMO. To learn more about TomoTherapy, please visit TomoTherapy.com.