MOSCOW HOSPITAL-BASED PROTON THERAPY FACILITY DESIGN

An innovative design for a hospital-based proton therapy facility is d escribed here in two versions: a single level (3600 m2) and a three-le vel plan (700-720 m2). The facility is designed to have 5 to 6 treatme nt rooms working simultaneously and independently of each other. The a ccelerator is a 250 MeV H-synchrotron, which produces a small external beam capable of pencil-beam scanning treatments. The small emittance of the beam yields cost savings in the size and weight of the magnets and the amount of concrete shielding. The beam delivery systems, inclu ding an isocentric gantry, are designed to use elements that are well known and thoroughly tested. Initial cost of a facility using this new design is estimated to be only 25-30% higher than construction of a f acility delivering conventional photon treatments.