TomoTherapy to Announce 2007 First-Quarter Results on Wed, June 13

Live Conference Call and Webcast at 4:00 p.m. CT

MADISON, Wis. – TomoTherapy Incorporated (NASDAQ: TTPY) today announced that it will release 2007 first-quarter results on Wednesday, June 13, 2007, at 3:00 pm CDT.
TomoTherapy Inc. also will hold an investment community conference call on Wednesday, June 13, 2007, beginning at 4:00 pm CDT. Dr. Fred Robertson, CEO, and Steve Hathaway, CFO, will review first-quarter performance and discuss the company’s strategies. To join the conference call, dial 1-866-700-6067 (international 1-617-213-8834) and enter passcode 79171754. A replay of the conference call will be available one hour after the call ends through 11:59 p.m. CT on Friday, June 15, 2007. To access the replay, dial 1-888-286-8010 (international 1-617-801-6888) and enter passcode 60780237.
For individual investors, a live webcast of the conference call will be available at TomoTherapy.com under the “Investor Relations” tab. Institutional investors can access the webcast through a password-protected site at http://www.streetevents.com. An archived webcast of TomoTherapy Inc.’s conference call will be available for two weeks.

About TomoTherapy Incorporated

TomoTherapy Incorporated has developed, manufactures and sells the Hi·Art® treatment system, one of the most advanced and versatile radiation therapy systems commercially available for the treatment of a wide variety of cancers.

4 Jun 2007