TomoTherapy to Present at Two Investment Conferences

TomoTherapy Incorporated (NASDAQ: TOMO) today announced that management will participate in two investment community conferences in early September 2008.

Company co-founder and chairman of the board Thomas "Rock” Mackie, Ph.D., and Steve Hathaway, CFO, will present at the Thomas Weisel Partners Healthcare Conference on Wednesday, Sept. 3, 2008, at 8:00 a.m. ET. The conference is taking place Sept. 3-5, 2008, at the Four Seasons Hotel in Boston, Mass.

On Thursday, Sept. 4, 2008, Mackie and Hathaway will present at the 2008 Citi Radiation Oncology Seminar at 3:10 p.m. ET. The conference is being held at the Citigroup Executive Conference Center in New York City.

A live Webcast of the Thomas Weisel Conference presentation will be available on the investor relations page of TomoTherapy’s Web site at www.TomoTherapy.com. For those who are unable to listen to the live presentation, an archive of the Webcast will be available on the company’s site for 30 days following the presentation.

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.