Secondary neutron dose during active scanning proton therapy

S. Safai, E. Hohmann, S. Mayer, O. Morath, R. Luescher, Chr. Bula, S. Zenklusen & E. Pedroni
Introduction: a new proton gantry dedicated to advance scanning has been build at Paul Scherrer Institute (PSI) and is under commissioning. Patient positioning is foreseen to occur directly in the treatment room with an in-room CT scanner. In addition, the gantry will be equipped with an X-ray system[for full text, please go to the a.m. URL]