Gantry structure for a hadron therapy apparatus

摘要

A gantry structure (16) designed for pivoting about an axis of rotation (18) and for delivering a hadron beam on a target comprises a beam delivery line (24) receiving the hadron beam in a direction essentially parallel to the axis of rotation (18), deviating it away from said axis of rotation (18) and delivering it so that the axis of the beam intersects the axis of rotation (18). The beam delivery line (24) is a self-supporting structure supported by a pivotable support arm (32) in proximity of the center of gravity of the beam delivery line (24). A counterweight (42) is supported by a support arm extension (40) on the other side of the axis of rotation (18) for compensating the moment of force due to the weight of the beam delivery line (24) and the support arm (32).

主权项

1. A gantry structure designed for pivoting about an axis of rotation and for delivering a hadron beam on a target, said gantry structure comprising:
a beam delivery line receiving said hadron beam in a direction essentially parallel to said axis of rotation, deviating it away from said axis of rotation and delivering it so that an axis of the beam intersects said axis of rotation; a counterweight supported on the other side of said axis of rotation for compensating a moment of force due to the weight of said beam delivery line; and a pivotable support arm supported by a support structure so as to be capable of pivoting about said axis of rotation, wherein said beam delivery line is a self-supporting structure supported by said pivotable support arm in proximity of a center of gravity of the beam delivery line, wherein said counterweight is supported by an extension of said support arm, and wherein said pivotable support arm has a plane of symmetry that is perpendicular to said axis of rotation and contains the center of gravity of said beam delivery line.