Particle beam therapy system and adjustment method for particle beam therapy system
First Claim
1. A particle beam therapy system, comprising:
- a scanning electromagnet provided with two scanning electromagnets that perform control to scan a supplied charged particle beam in respective different directions so that the charged particle beam is formed in a three-dimensional irradiation shape based on a treatment plan; and
a deflection electromagnet that switches orbits for a charged particle beam in such a way that the charged particle beam with which scanning is performed by the scanning electromagnet heads for an isocenter through a single beam orbit selected from a plurality of beam orbits for multi-port irradiation established between the isocenter and the scanning electromagnet,wherein the deflection electromagnet includes a first deflection electromagnet that is provided at the downstream side of the scanning electromagnet and deflects a charged particle beam with which scanning has been performed by the scanning electromagnet, in accordance with the selected orbit; and
a second deflection electromagnet that is provided at the downstream side of the first deflection electromagnet and deflects to the isocenter a charged particle beam that has been deflected by the first deflection electromagnet.
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Accused Products
Abstract
The objective is to obtain a particle beam therapy system, the irradiation flexibility of which is high and that can reduce the amount of irradiation onto a normal tissue. There are provided a scanning electromagnet that performs scanning and outputting in such a way that a supplied charged particle beam is formed in a three-dimensional irradiation shape based on a treatment plan; and deflection electromagnets that switch the orbits for the charged particle beam in such a way that the charged particle beam with which scanning and outputting are performed by the scanning electromagnet reaches an isocenter through a single beam orbit selected from a plurality of beam orbits established between the isocenter and the scanning electromagnet. The distance between the scanning electromagnet and the isocenter is made long.
54 Citations
10 Claims
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1. A particle beam therapy system, comprising:
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a scanning electromagnet provided with two scanning electromagnets that perform control to scan a supplied charged particle beam in respective different directions so that the charged particle beam is formed in a three-dimensional irradiation shape based on a treatment plan; and a deflection electromagnet that switches orbits for a charged particle beam in such a way that the charged particle beam with which scanning is performed by the scanning electromagnet heads for an isocenter through a single beam orbit selected from a plurality of beam orbits for multi-port irradiation established between the isocenter and the scanning electromagnet, wherein the deflection electromagnet includes a first deflection electromagnet that is provided at the downstream side of the scanning electromagnet and deflects a charged particle beam with which scanning has been performed by the scanning electromagnet, in accordance with the selected orbit; and
a second deflection electromagnet that is provided at the downstream side of the first deflection electromagnet and deflects to the isocenter a charged particle beam that has been deflected by the first deflection electromagnet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An adjustment method for a particle beam therapy system, comprising:
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setting, by an irradiation control unit of the particle beam therapy system, a beam orbit and providing a beam measurement unit that measures the irradiation position coordinates of a charged particle beam irradiated from the particle beam therapy system in accordance with the set beam orbit; reading, by the irradiation control unit, a plurality of irradiation control values that are different from one another; irradiating, by the irradiation control unit, a charged particle beam onto the beam measurement unit in accordance with the read irradiation control values and measuring the irradiation position coordinates of the charged particle beam; and setting, by the irradiation control unit, unknown parameters in an inverse-map mathematical expression model, based on a combination of a plurality of measurement results for the measured irradiation position coordinates and the plurality of irradiation control values.
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Specification