Irradiation apparatus and irradiation method
First Claim
1. An irradiation apparatus for radiating a radiation beam transported from a particle accelerator onto a location to be irradiated that is positioned on an irradiation table, said apparatus comprising:
- a beam interruption part for interrupting said radiation beam;
a position control part for controlling a position of said irradiation table such that said radiation beam is radiated onto an entire surface of a target in a plurality of irradiation zones including an overlapping zone formed by a plurality of radiations of said radiation beam; and
a multileaf collimator control part for controlling said radiation beam to provide a slope to a dose distribution in said overlapping zone of said irradiation zones, respectively, such that the dose distribution is made flat over the entire surface of said target including said overlapping zone by the plurality of radiations of said radiation beam.
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Accused Products
Abstract
An irradiation apparatus has a large irradiation field and is capable of ensuring the uniformity of a dose distribution without strengthening the performance of an irradiation field enlarging device. The irradiation apparatus includes a beam interruption part for performing a plurality of irradiations of a radiation beam, a position control part for controlling a location to be irradiated in such a manner that the entire surface of the target can be irradiated in a plurality of irradiation zones including an overlapping area formed by the plurality of irradiations, and a multileaf collimator control part for providing a slope to a dose distribution in the overlapping area of the respective irradiation zones, so that the dose distribution over the entire surface of the target including the overlapping area is made flat or uniform by the plurality of irradiations of the radiation beam.
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Citations
15 Claims
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1. An irradiation apparatus for radiating a radiation beam transported from a particle accelerator onto a location to be irradiated that is positioned on an irradiation table, said apparatus comprising:
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a beam interruption part for interrupting said radiation beam;
a position control part for controlling a position of said irradiation table such that said radiation beam is radiated onto an entire surface of a target in a plurality of irradiation zones including an overlapping zone formed by a plurality of radiations of said radiation beam; and
a multileaf collimator control part for controlling said radiation beam to provide a slope to a dose distribution in said overlapping zone of said irradiation zones, respectively, such that the dose distribution is made flat over the entire surface of said target including said overlapping zone by the plurality of radiations of said radiation beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A irradiation method comprising:
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dividing a location to be irradiated into a first irradiation zone and a second irradiation zone, the first irradiation zone and the second irradiation zone partially overlapping creating an overlapping zone;
radiating a radiation beam to said first irradiation zone such that a distribution of a dose radiated to said overlapping zone has a slope that decreases from a boundary between said overlapping zone and a non-overlapping zone of said first irradiation zone toward said second irradiation zone; and
radiating a radiation beam to said second irradiation zone such that a distribution of a dose radiated to said overlapping zone has a slope that decreases from a boundary between said overlapping zone and a non-overlapping zone of said second irradiation zone toward said first irradiation zone, with a dose distribution in a target being made flat.
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15. An irradiation method comprising:
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dividing a location to be irradiated into first, second, and third irradiation zones that partially overlap, each of the first, second, and third irradiation zones having non-overlapping zones and overlapping zones adjoining each other;
radiating a radiation beam to said first irradiation zone such that a distribution of a dose radiated to two overlapping zones in said first irradiation zone overlapping with at least one of said second irradiation zone and said third irradiation zone has a slope that decreases from boundaries between said overlapping zones and a non-overlapping zone in said first irradiation zone toward at least one of said second and third irradiation zones;
radiating the radiation beam to said second irradiation zone in such a manner that a distribution of a dose radiated to two overlapping zones in said second irradiation zone overlapping with at least one of said first and third irradiation zones has a slope that decreases from boundaries between said overlapping zones and a non-overlapping zone in said second irradiation zone toward at least one of said first and third irradiation zones, with a total dose distribution in said overlapping zone of said second irradiation zone that overlaps with said first irradiation zone alone being made flat; and
radiating the radiation beam to said third irradiation zone in such a manner that a distribution of a dose radiated to two overlapping zones of said third irradiation zone overlapping with at least one of said first and second irradiation zones has a slope that decreases from boundaries between said overlapping zones and a non-overlapping zone in said third irradiation zone toward at least one of said first and second irradiation zones, with a total dose distribution in said overlapping zones of said third irradiation zone that overlap with one of said first and second irradiation zones being made flat.
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Specification