Compac gantry for particle therapy
First Claim
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1. An isocentric gantry designed for rotating around an axis of rotation and for delivering a particle beam for use in particle therapy, comprising:
- a gantry beam line having a gantry entrance point for entering said particle beam into the gantry in a direction essentially parallel with the axis of rotation;
bending means for bending the particle beam in a single plane and delivering said particle beam at an isocenter in a direction essentially perpendicular to the axis of rotation, wherein said bending means include;
first bending means configured for bending the particle beam away from said axis of rotation,second bending means configured for bending the particle beam towards the axis of rotation, andthird bending means configured for bending the particle beam to said direction essentially perpendicular to the axis of rotation, said third bending means having a bending angle smaller than 80°
; and
particle beam scanning means installed in the beam line and configured for scanning said particle beam in both X and Y directions over a target area at the isocenter, wherein the scanning means is located between the second and the third bending means.
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Abstract
The present invention relates to a particle therapy apparatus used for radiation therapy. More particularly, this invention relates to a compact isocentric gantry for delivering particle beams perpendicularly to a rotation axis of the gantry. The gantry comprises three dipole magnets. The angle of the last dipole magnet is smaller than 90° and a most preferred bending angle for this last dipole magnet is 60°.
37 Citations
21 Claims
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1. An isocentric gantry designed for rotating around an axis of rotation and for delivering a particle beam for use in particle therapy, comprising:
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a gantry beam line having a gantry entrance point for entering said particle beam into the gantry in a direction essentially parallel with the axis of rotation; bending means for bending the particle beam in a single plane and delivering said particle beam at an isocenter in a direction essentially perpendicular to the axis of rotation, wherein said bending means include; first bending means configured for bending the particle beam away from said axis of rotation, second bending means configured for bending the particle beam towards the axis of rotation, and third bending means configured for bending the particle beam to said direction essentially perpendicular to the axis of rotation, said third bending means having a bending angle smaller than 80°
; andparticle beam scanning means installed in the beam line and configured for scanning said particle beam in both X and Y directions over a target area at the isocenter, wherein the scanning means is located between the second and the third bending means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An isocentric gantry designed for rotating around an axis of rotation and for delivering a particle beam for use in particle therapy, comprising:
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a gantry beam line having a gantry entrance point for entering said particle beam into the gantry in a direction essentially parallel with the axis of rotation; a sequence of dipole magnets arranged for bending the particle beam in a single plane and delivering said particle beam at an isocenter in a direction essentially perpendicular to the axis of rotation, quadrupole magnets for focusing and defocusing said particle beam; and a first scatterer and a second scatterer installed in the beam line and adapted to provide a broad beam in both X and Y directions at the isocenter, the first scatterer being located between two dipole magnets of said sequence of dipole magnets, wherein in said sequence of dipole magnets, the sum of the bending angles of the dipole magnet or magnets which are located downstream of the first scatterer is smaller than 80°
;wherein the sequence of dipole magnets comprises a first dipole magnet configured to bend the particle beam away from said axis of rotation, a second dipole magnet configured to bend the particle beam towards the axis of rotation, and a third dipole magnet configured to bend the particle beam to said direction essentially perpendicular to the axis of rotation, said third dipole magnet having a bending angle smaller than 80°
, andwherein the first scatterer is installed between said second dipole magnet and said third dipole magnet and the second scatterer is installed after said third dipole magnet. - View Dependent Claims (9)
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10. A particle therapy method for delivering a particle beam to a target by an isocentric gantry designed for rotating around an axis of rotation and for delivering the particle beam to the target in a direction essentially perpendicular to the axis of rotation, comprising the steps:
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providing a particle beam at an entrance point of said gantry, in a direction essentially parallel with the axis of rotation; bending the particle beam, downstream of the entrance point, within the gantry, to a direction away from the axis of rotation; bending the particle beam, downstream of the bending to a direction away from the axis of rotation, within the gantry, to a direction towards the axis of rotation; scanning the particle beam, downstream of the bending to a direction towards the axis of rotation, within the gantry in both X and Y directions; and
,bending the particle beam, downstream of scanning the particle beam in the X and Y directions, within the gantry, by a total angle smaller than 80° and
greater than 0°
. - View Dependent Claims (11, 12, 13, 14)
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15. An isocentric gantry designed for rotating around an axis of rotation and for delivering a particle beam for use in particle therapy, comprising:
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a gantry beam line having a gantry entrance point for entering said particle beam into the gantry in a direction essentially parallel with the axis of rotation; a sequence of dipole magnets arranged for bending the particle beam in a single plane and for delivering said particle beam at an isocenter in a direction essentially perpendicular to the axis of rotation, quadrupole magnets for focussing and defocusing said particle beam; and particle beam scanning means installed between two dipole magnets of the sequence of dipole magnets and configured for scanning said particle beam in both X and Y directions over a target area at the isocenter, wherein in said sequence of dipole magnets, the sum of the bending angles of the dipole magnets which are located downstream of said particle beam scanning means is smaller than 80°
. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification