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公开(公告)号：US20240023225A1
公开(公告)日：2024-01-18
申请号：US18203683
申请日：2023-05-31
申请人： Hitachi, Ltd.
发明人： Chishin HORI , Kento NISHIDA
CPC分类号： H05H7/10 , A61N5/10 , H05H7/04 , H05H13/02 , A61N2005/1087 , H05H2277/11
摘要： An accelerator includes: a main magnetic field magnet that has a plurality of magnetic poles and excites the main magnetic field in a space interposed between the magnetic poles; a magnetic channel that extracts the ion beam from an inside of the main magnetic field magnet toward an outside of the main magnetic field magnet; a displacement unit that displaces the ion beam circulating in a main magnetic field region to an outer side of the main magnetic field region; and a disturbance magnetic field region that is provided in an outer peripheral portion of the main magnetic field region and excites a magnetic field which disturbs the ion beam displaced to the outer side and guides the ion beam to the magnetic channel, the magnetic channel including a predetermined mechanism that suppresses a magnetic field gradient generated radially inward in the circulating ion beam region.
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公开(公告)号：US11849533B2
公开(公告)日：2023-12-19
申请号：US18062056
申请日：2022-12-06
申请人： Hitachi, Ltd.
发明人： Takamitsu Hae , Takayoshi Seki , Kazuyoshi Saitou , Fumiaki Noda , Takamichi Aoki , Kazuo Hiramoto
CPC分类号： H05H7/10 , H05H7/04 , H05H13/02 , H05H2007/087 , H05H2277/11
摘要： In a circular accelerator that applies a radiofrequency wave in a main magnetic field to accelerate charged particle beam while increasing an orbit radius, another radiofrequency wave with a frequency different from the radiofrequency wave used for acceleration is applied to the charged particle beam in order to extract the charged particle beam. Thereby, in the circular accelerator that accelerates charged particle beam while increasing an orbit radius by applying a radiofrequency wave in a main magnetic field, the high precision control on extraction of the charged particle beam from the circular accelerator is achieved.
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公开(公告)号：US10722735B2
公开(公告)日：2020-07-28
申请号：US16251253
申请日：2019-01-18
摘要： A system includes a patient support and an outer gantry on which an accelerator is mounted to enable the accelerator to move through a range of positions around a patient on the patient support. The accelerator is configured to produce a proton or ion beam having an energy level sufficient to reach a target in the patient. An inner gantry includes an aperture for directing the proton or ion beam towards the target.
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公开(公告)号：US20200078603A1
公开(公告)日：2020-03-12
申请号：US16573130
申请日：2019-09-17
摘要： An example particle therapy system includes: a particle accelerator to output a beam of charged particles; and a scanning system to scan the beam across at least part of an irradiation target. An example scanning system includes: a scanning magnet to move the beam during scanning; and a control system (i) to control the scanning magnet to produce uninterrupted movement of the beam over at least part of a depth-wise layer of the irradiation target so as to deliver doses of charged particles to the irradiation target; and (ii) to determine, in synchronism with delivery of a dose, information identifying the dose actually delivered at different positions along the depth-wise layer.
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公开(公告)号：US10434331B2
公开(公告)日：2019-10-08
申请号：US15492132
申请日：2017-04-20
摘要： An example particle therapy system includes: a particle accelerator to output a beam of charged particles; and a scanning system to scan the beam across at least part of an irradiation target. An example scanning system includes: a scanning magnet to move the beam during scanning; and a control system (i) to control the scanning magnet to produce uninterrupted movement of the beam over at least part of a depth-wise layer of the irradiation target so as to deliver doses of charged particles to the irradiation target; and (ii) to determine, in synchronism with delivery of a dose, information identifying the dose actually delivered at different positions along the depth-wise layer.
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公开(公告)号：US20190250582A1
公开(公告)日：2019-08-15
申请号：US16269287
申请日：2019-02-06
CPC分类号： G05B19/19 , A61N5/1077 , A61N2005/1095 , G05B2219/39221 , G05B2219/40555 , H02K7/08 , H02K7/116 , H02K11/215 , H02K11/30 , H05H7/04 , H05H13/02 , H05H2007/004
摘要： An example system includes: a magnet including one or more coils to conduct current to generate a magnetic field, with the magnetic field to affect output of radiation to a target; and one or more actuators, with an actuator among the one or more actuators being at least part of a physical coupling to the one or more coils, and with the actuator being controllable to move the one or more coils via the physical coupling based on movement of the magnet.
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公开(公告)号：US10070510B2
公开(公告)日：2018-09-04
申请号：US15725350
申请日：2017-10-05
摘要： The embodiments of the present disclosure relate to a method and system for controlling the extraction of ion beam pulses produced by a synchrocyclotron. The synchrocyclotron comprises electrodes configured to be placed in a magnetic field. An alternating voltage is applied between the electrodes, and the frequency of the alternating voltage is modulated in a cyclic manner. In other embodiments, the method further comprises the steps of starting an acceleration cycle of the synchrocyclotron, generating a reference signal when the modulated frequency reaches a predefined value, communicating the time, at which the reference signal is generated, to the beam control elements, assessing one or more status parameters of the one or more beam control elements, and cancelling or proceeding with the extraction of the beam pulse depending on the results of the assessment.
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公开(公告)号：US10016623B2
公开(公告)日：2018-07-10
申请号：US15375259
申请日：2016-12-12
发明人： Yves Claereboudt , Damien Prieels
CPC分类号： A61N5/1043 , A61N5/103 , A61N5/107 , A61N5/1081 , A61N2005/1076 , A61N2005/1087 , H05H7/04 , H05H13/005 , H05H13/02 , H05H13/04 , H05H2007/048 , H05H2245/122
摘要： The present disclosure relates to a particle therapy system for irradiating a target with a scanning beam technique. In one implementation, the system includes an irradiation planning device with a planning algorithm configured to associate a particle beam energy E(i) to each spot of the irradiation plan and organize the spots in a sequence of spots according to energy. The system may further include a control system configured for controlling in parallel, from spot to spot, a variation of an output energy of a beam generator, a variation of a magnetic field of one or more electromagnets of a beam transport system and a variation of a magnetic field of the scanning magnet.
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公开(公告)号：US09730308B2
公开(公告)日：2017-08-08
申请号：US13916401
申请日：2013-06-12
CPC分类号： H05H13/02 , A61N5/1043 , A61N5/1077 , A61N2005/1087 , A61N2005/1095 , H05H2277/11
摘要： An example synchrocyclotron includes the following: a voltage source to provide a radio frequency (RF) voltage to a cavity to accelerate particles from a particle source; a coil to receive a variable electrical current and to generate a magnetic field that is at least 4 Tesla to cause the particles to move orbitally within the cavity; and an extraction channel to receive the accelerated particles and to output the received particles from the cavity. The particles that are output from the cavity have an energy that is variable based at least on the variable electrical current applied to the coil.
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公开(公告)号：US09681531B2
公开(公告)日：2017-06-13
申请号：US14038967
申请日：2013-09-27
CPC分类号： H05H13/02 , A61N5/1048 , A61N5/1065 , A61N5/1077 , A61N2005/1095 , H05H2007/004
摘要： An example particle therapy system includes a particle accelerator to output a particle beam, where the particle accelerator includes: a particle source to provide pulses of ionized plasma to a cavity, where each pulse of the particle source has a pulse width corresponding to a duration of operation of the particle source to produce the corresponding pulse, and where the particle beam is based on the pulses of ionized plasma; and a modulator wheel having different thicknesses, where each thickness extends across a different circumferential length of the modulator wheel, and where the modulator wheel is arranged to receive a precursor to the particle beam and is configured to create a spread-out Bragg peak for the particle beam.
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