TomoTherapy to Present at Two Investment Conferences

Company Featured at Thomas Weisel Partners Healthcare Conference
2008 on Sept. 3, Citi Radiation Oncology Seminar on Sept. 4
MADISON, Wis.--(Business Wire)--
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(R) Hi-Art(R) 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.

TomoTherapy Incorporated
Investor Contact:
Stephen C. Hathaway, Chief Financial Officer
608.824.2800
shathaway@tomotherapy.com

Copyright Business Wire 2008