Patent ID: 8368043
Filing Date: 2013-02-05
Classification: A61N

Abstract:
1. An apparatus for particle therapy in a treatment room, the apparatus comprising: an irradiation unit for emitting a particle beam, a gantry comprising the irradiation unit, said gantry being rotatable around an axis, a squirrel cage structure, located within and supported by said gantry so that it can rotate relative to said gantry around said axis, a frame arranged so as to be motionless, a moving floor comprising a plurality of elongated members flexibly connected to each other and forming a primary caterpillar, two moving floor guide units having a truncated circle shape, facing each other, attached to said squirrel cage structure and the motionless frame respectively, and each of the two moving floor guide units comprising at least a first rail, said first rail having a truncated circle shape, said primary caterpillar being slidably arranged on said first rail, and wherein each moving floor guide unit further comprises at least a second rail having a truncated circle shape and the moving floor further comprises at least one secondary caterpillar comprising elongated members flexibly connected to each other, said secondary caterpillar being slidably arranged on said second rail and attached to the irradiation unit so that it can rotate with the irradiation unit.