| 摘要 |
An irradiation device provides a free volume around the longitudinal axis of the body ( 13 ) around the body to be irradiated. The supporting parts of a gantry ( 1, 2 ) are situated substantially radially with respect to the longitudinal axis. The gantry includes an inner gantry part ( 1 ) with at least two supporting locations (S) to an outer gantry portion ( 2 ).The support locations (S) are situated at each side of a treatment volume ( 12 ). A radiation head ( 8 ), mechanically attached to the inner gantry part ( 1 ) and arranged to direct radiation to the treatment volume ( 12 ) is movable around the treatment volume ( 12 ). In preferred embodiments, the parts ( 20, 21, 22, 23 ) of the gantry are formed as rings, leaving a free space along the rotational axis ( 9 ). A body-supporting couch ( 10 ) is arranged along the rotational axis extending through the hollow parts ( 20, 21, 22, 23 ). The radiation head ( 8 ) is preferably movable in a path also perpendicular to the rotation axis ( 9 ). |
