TomoTherapy to Host Analyst and Investor Presentation at 2009 ASTRO Meeting in Chicago

MADISON, WI--(Marketwire - October 12, 2009) - TomoTherapy Incorporated (NASDAQ: TOMO) announced today that it will host an analyst and investor presentation in conjunction with the annual ASTRO (American Society for Radiation Oncology) meeting on Monday, Nov. 2, 2009, at 8:00 a.m. CT.

Analysts and institutional investors are invited to register for this event by visiting: http://www.tomotherapy.com/register/2009_astro_analyst_investor_presentation/.

Space is limited and early registration is advised.

TomoTherapy’s management team will present an update on its business and highlights of new developments for the TomoTherapy® radiation therapy platform. The company’s presentation will be Webcast. To access the live Webcast on Nov. 2, 2009, 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 11:00 a.m. CT on the same day.

About TomoTherapy Incorporated
TomoTherapy Incorporated has developed, markets and sells the TomoTherapy® Hi·Art® treatment system, an advanced radiation therapy system for the treatment of a wide variety of cancers. The Hi·Art 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.

©2009 TomoTherapy Incorporated. All rights reserved. TomoTherapy, Hi-Art and the TomoTherapy logo are among trademarks, service marks or registered trademarks of TomoTherapy Incorporated in the United States and other countries.