Achromatic and uncoupled medical gantry
First Claim
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1. A particle therapy gantry for delivering a particle beam to a patient comprising:
- a beam tube defining a particle beam path;
a plurality of dipole magnets sequentially arranged along the beam tube for guiding the particle beam along the particle beam path; and
a plurality of quadrupole magnets that provide a fully achromatic and uncoupled beam transport for the unconstrained particle beam at the gantry entrance to the gantry isocenter;
wherein the size and shape of the particle beam is independent of the angle of gantry rotation, and wherein the gantry can be rotated by any angle between 0 and 360 with respect to a fixed incoming beam linewherein the plurality of quadrupoles comprises six quadrupoles arranged in three quadrupole pairs with each quadrupole pair symmetrically arranged about the center between each pair of dipole magnets adjacent to the three quadrupole pairs.
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Abstract
A medical gantry that focus the beam from the beginning of the gantry to the exit of the gantry independent of the rotation angle of the gantry by keeping the beam achromatic and uncoupled, thus, avoiding the use of collimators or rotators, or additional equipment to control the beam divergence, which may cause beam intensity loss or additional time in irradiation of the patient, or disadvantageously increase the overall gantry size inapplicable for the use in the medical treatment facility.
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Citations
27 Claims
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1. A particle therapy gantry for delivering a particle beam to a patient comprising:
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a beam tube defining a particle beam path; a plurality of dipole magnets sequentially arranged along the beam tube for guiding the particle beam along the particle beam path; and a plurality of quadrupole magnets that provide a fully achromatic and uncoupled beam transport for the unconstrained particle beam at the gantry entrance to the gantry isocenter; wherein the size and shape of the particle beam is independent of the angle of gantry rotation, and wherein the gantry can be rotated by any angle between 0 and 360 with respect to a fixed incoming beam line wherein the plurality of quadrupoles comprises six quadrupoles arranged in three quadrupole pairs with each quadrupole pair symmetrically arranged about the center between each pair of dipole magnets adjacent to the three quadrupole pairs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for delivering an unconstrained particle beam to a patient through a gantry comprising the steps of:
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bending the unconstrained particle beam with a plurality of fixed field dipole magnets sequentially arranged along a beam tube of the gantry for the particle beam traveling in said beam tube; maintaining the achromatic and uncoupled conditions of the particle beam from the gantry exit to the isocenter of the particle beam path by a plurality of quadrupole magnets; wherein the size and shape of the particle beam is independent of the angle of gantry rotation for the particle beam unconstrained at the gantry entrance, wherein the gantry can be rotated by any angle between 0 and 360 with respect to a fixed incoming beam line and wherein the plurality of quadrupoles comprises six quadrupoles arranged in three quadrupole pairs with each quadrupole pair symmetrically arranged about the center between each pair of dipole magnets adjacent to the three quadrupole pairs. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification