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 Roy T. Tanaka to its board of directors. Tanaka, 60, brings to the TomoTherapy board 27 years of operational leadership experience, including global market expansion. He is newly retired from Biosense Webster, Inc., a Johnson & Johnson company, where he most recently served as worldwide president.