Stable rotatable radiation gantry
First Claim
1. Irradiation device, comprisinga gantry;
- said gantry comprising an inner gantry part and an outer gantry part;
a radiation head, mechanically supported by said inner gantry part and rotatable around a rotation axis;
said radiation head being arranged to direct radiation to a treatment volume situated substantially on said rotation axis;
wherein all movable parts of said gantry are, in all situations, situated at a distance from said rotation axis larger than a predetermined value;
said inner gantry part being rotatably supported by said outer gantry part at two support locations, situated on opposite sides of said treatment volume in a direction parallel to said axis;
said outer gantry part being stationary with respect to said treatment volume;
said radiation head being movable relative to said outer gantry along at least one arc of a circle substantially centered at said treatment volume;
said arc being non-parallel with the rotation of said radiation head around said rotation axis, whereby non-coplanar irradiation treatment is achievable.
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Accused Products
Abstract
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).
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Citations
16 Claims
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1. Irradiation device, comprising
a gantry; -
said gantry comprising an inner gantry part and an outer gantry part; a radiation head, mechanically supported by said inner gantry part and rotatable around a rotation axis; said radiation head being arranged to direct radiation to a treatment volume situated substantially on said rotation axis; wherein all movable parts of said gantry are, in all situations, situated at a distance from said rotation axis larger than a predetermined value; said inner gantry part being rotatably supported by said outer gantry part at two support locations, situated on opposite sides of said treatment volume in a direction parallel to said axis; said outer gantry part being stationary with respect to said treatment volume; said radiation head being movable relative to said outer gantry along at least one arc of a circle substantially centered at said treatment volume; said arc being non-parallel with the rotation of said radiation head around said rotation axis, whereby non-coplanar irradiation treatment is achievable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. Irradiation device comprising:
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a gantry; said gantry comprising an inner gantry part and an outer gantry part; a radiation head, mechanically supported by said inner gantry part and rotatable around a rotation axis; said radiation head being arranged to direct radiation to a treatment volume situated substantially on said rotation axis; wherein all movable parts of said gantry are, in all situations, situated at a distance from said rotation axis larger than a predetermined value; said inner gantry part being rotatably supported by said outer gantry part at two support locations, situated on opposite sides of said treatment volume in a direction parallel to said axis; said inner gantry part further comprising a linear beam portion, on which said radiation head is movably supported for motions along said linear beam portion; said linear beam portion mechanically connecting said two support locations; and said linear beam portion being substantially parallel to said rotation axis; wherein said radiation head is tiltably supported by said linear beam portion, said radiation head directing its radiation towards said treatment volume from any position relative to said linear beam portion.
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Specification