Particle Beam Irradiation Method and Particle Beam Irradiation Apparatus Used for the Same
First Claim
1. A particle beam irradiation method which uses both a depth direction irradiation field spread for spreading an irradiation field of a particle beam in a depth direction along an irradiation direction of the particle beam, and a lateral direction irradiation field spread for spreading the irradiation field of the particle beam in a lateral direction perpendicular to the irradiation direction of the particle beam, and which irradiates the particle beam on an irradiation target, wherein the depth direction irradiation field spread is an active irradiation field spread in which plural irradiation layers having different ranges in the irradiation direction of the particle beam are superimposed, the lateral direction irradiation field spread is an active irradiation spread in which irradiation spots of the particle beam are superimposed in the lateral direction, and a bolus having a shape along a deepest part of the irradiation target in the depth direction is disposed to cross the particle beam.
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Accused Products
Abstract
In a particle beam irradiation method and a particle beam irradiation apparatus in which depth direction irradiation field spread and lateral direction irradiation field spread are performed, an irradiation dose in each of irradiation layers of an irradiation target is made substantially constant, and control is simplified. The depth direction irradiation field spread is made the active irradiation field spread in which plural irradiation layers having different ranges in an irradiation direction of the particle beam are superimposed, the lateral direction irradiation field spread is made the active irradiation field spread in which irradiation spots of the particle beam are superimposed in the lateral direction, and a bolus having a shape along a deepest part of the irradiation target in the depth direction is disposed to cross the particle beam.
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Citations
14 Claims
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1. A particle beam irradiation method which uses both a depth direction irradiation field spread for spreading an irradiation field of a particle beam in a depth direction along an irradiation direction of the particle beam, and a lateral direction irradiation field spread for spreading the irradiation field of the particle beam in a lateral direction perpendicular to the irradiation direction of the particle beam, and which irradiates the particle beam on an irradiation target, wherein
the depth direction irradiation field spread is an active irradiation field spread in which plural irradiation layers having different ranges in the irradiation direction of the particle beam are superimposed, the lateral direction irradiation field spread is an active irradiation spread in which irradiation spots of the particle beam are superimposed in the lateral direction, and a bolus having a shape along a deepest part of the irradiation target in the depth direction is disposed to cross the particle beam.
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9. A particle beam irradiation apparatus comprising:
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a particle beam generation part for generating a particle beam;
a particle beam transport part for transporting the particle beam generated by the particle beam generation part;
a particle beam irradiation part for irradiating the particle beam transported by the particle beam transport part to an irradiation target;
depth direction irradiation field spread means for spreading an irradiation field of the particle beam in a depth direction along an irradiation direction of an irradiation direction of the particle beam; and
lateral direction irradiation field spread means for spreading the irradiation field of the particle beam in a lateral direction perpendicular to the irradiation direction of the particle beam, wherein the depth direction irradiation field spread means is an active depth direction irradiation field spread means for superimposing plural irradiation layers having different ranges in the irradiation direction of the particle beam, the lateral direction irradiation field spread means is an active irradiation field spread means for superimposing irradiation spots of the particle beam in the lateral direction, and a bolus having a shape along a deepest part of the irradiation target in the depth direction is disposed to cross the particle beam. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification