MADISON, Wis.--(BUSINESS WIRE)--TomoTherapy Incorporated (NASDAQ: TOMO), maker of the TomoTherapy® Hi·Art® treatment system for advanced radiation therapy, announced today the appointment of John J. Greisch, 52, to its board of directors, effective January 31, 2008. Greisch brings 30 years of corporate finance and operational leadership experience to the TomoTherapy board. He currently serves as corporate vice president and president, international, for Baxter International Inc.