TREATMENT PLANNING APPARATUS AND PARTICLE THERAPY SYSTEM
First Claim
1. A treatment planning apparatus for planning a uniform scan in which a dose distribution uniform in lateral directions is formed by scanning a charged particle beam with electromagnets, wherein:
- the treatment planning apparatus comprises a treatment planning operation unit that calculates an optimum scan path in the lateral directions in consideration of a collimator aperture.
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Accused Products
Abstract
A charged particle beam reduces treatment time in the uniform scanning or in the conformal layer stacking irradiation. In the uniform scanning, an optimum charged particle beam scan path for uniformly irradiating a collimator aperture area is calculated. In the conformal layer stacking irradiation, an optimum charged particle beam scan path for uniformly irradiating a multi-leaf collimator aperture area of each layer for each of the layers obtained by partitioning the target volume is calculated. Alternatively, a minimum irradiation field size that covers the multi-leaf collimator aperture area of each layer is calculated, and a scan path corresponding to the irradiation field size, prestored in a memory of a particle therapy control apparatus, is selected. The charged particle beam scan path is optimally changed in the lateral directions in conformity with the collimator aperture area in the uniform scanning or in each layer in the conformal layer stacking irradiation.
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Citations
15 Claims
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1. A treatment planning apparatus for planning a uniform scan in which a dose distribution uniform in lateral directions is formed by scanning a charged particle beam with electromagnets, wherein:
the treatment planning apparatus comprises a treatment planning operation unit that calculates an optimum scan path in the lateral directions in consideration of a collimator aperture. - View Dependent Claims (2, 3)
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4. A treatment planning apparatus for planning conformal layer stacking irradiation in which a target volume is partitioned into layers, a bolus for adjusting the dose distribution to the shape of the target volume is used, and each layer of the layer-partitioned target volume is successively irradiated with a charged particle beam while changing the irradiation field shape in lateral directions for each layer by using a multi-leaf collimator, wherein:
the treatment planning apparatus comprises a treatment planning operation unit that changes the scan path of the charged particle beam for each layer by calculating a multi-leaf collimator aperture area of each layer and calculating a minimum scan path of the charged particle beam suitable for the calculated aperture area. - View Dependent Claims (6, 7, 8, 9, 10)
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5. A particle therapy system for conducting conformal layer stacking irradiation in which a target volume is partitioned into layers, a bolus for adjusting the dose distribution to the shape of the target volume is used, and each layer of the layer-partitioned target volume is successively irradiated with a charged particle beam while changing the irradiation field shape in lateral directions for each layer using a multi-leaf collimator, wherein:
- the particle therapy system comprises;
a treatment planning apparatus that calculates a multi-leaf collimator aperture area of each layer and calculates an irradiation field size covering the calculated aperture area, and a control apparatus that previously holds a plurality of scan paths corresponding to the calculated irradiation field sizes and changes the scan path of the charged particle beam for each layer based on the scan path corresponding to the calculated irradiation field size. - View Dependent Claims (11, 12, 13, 14, 15)
- the particle therapy system comprises;
Specification