抄録
Conceptual design of a proton rotating gantry for cancer therapy has been made taking in mind the installation in the new proton cancer therapy facility. Since beam delivery system affects the gantry design, several methods of forming the uniform irradiation field have been compared and their merit and points to be noticed have been clarified. Based on the review of the technical aspects of the present proton rotating gantry, an isocentric gantry with a single bending plane was proposed to decrease the magnet weight and power and to secure the free space allowing the table carrying the patient couch to rotate around a vertical axis and translate. Although the double scattering system will be installed in the gantry at the early stage, there remains room for installing more efficient and elaborate method like the beam optical method.
