TomoTherapy Announces Upcoming Ticker Symbol Change to ''TOMO''

  
    
  
  
    
      TomoTherapy Incorporated 
      (NASDAQ:TTPY) today announced that it intends to change its ticker 
      symbol on the NASDAQ Global Select Market to “TOMO”, 
      effective January 1, 2008. The ticker symbol “TOMO” 
      was not available at the time of the company’s 
      initial public offering, but is now available and reserved for the 
      company. Management believes “TOMO” 
      better represents the company’s name in the 
      financial community.
    
    
      Shareholders are not required to take any action with respect to this 
      change.
    
    
      About TomoTherapy Incorporated
    
    
      TomoTherapy Incorporated has developed, manufactures 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 completed its initial public offering in May 2007 
      and its stock is traded on the NASDAQ Global Market under the symbol 
      TTPY. To learn more about TomoTherapy, please visit our Web site at www.TomoTherapy.com.
    
    
      ©2007 TomoTherapy Incorporated. All rights 
      reserved. The following words and logos used herein or in italicized or 
      stylized text are trademarks or registered trademarks of TomoTherapy 
      Incorporated in the United States and other countries: the TomoTherapy 
      logo, TomoTherapy, Hi·Art and CTrue.