Scanning system for a particle therapy system
First Claim
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1. A particle therapy system comprising:
- a particle accelerator to output a beam comprised of pulses of charged particles, the pulses being synchronized to radio frequency (RF) cycles of the particle accelerator; and
a scanning system to scan the beam across at least part of an irradiation target, the scanning system comprising;
a scanning magnet to move the beam during scanning, where a position of the beam corresponds to a current of the scanning magnet; and
a control system (i) to control the current in order to produce uninterrupted movement of the beam across at least part of an irradiation target to deliver doses of the charged particles that are based on the pulses, the uninterrupted movement being independent of the RF cycles of the particle accelerator, (ii) for positions at which the particle beam delivers dose in synchronism with the RF cycles, to store information identifying a location and an amount of dose delivered, (iii) to compare a cumulative dose delivered at each position to a target cumulative dose, and (iv) if the cumulative dose does not match the target cumulative dose at specific positions, to control the current in order to move the beam so as to deliver additional dose to the specific positions.
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Abstract
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.
1043 Citations
25 Claims
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1. A particle therapy system comprising:
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a particle accelerator to output a beam comprised of pulses of charged particles, the pulses being synchronized to radio frequency (RF) cycles of the particle accelerator; and a scanning system to scan the beam across at least part of an irradiation target, the scanning system comprising; a scanning magnet to move the beam during scanning, where a position of the beam corresponds to a current of the scanning magnet; and a control system (i) to control the current in order to produce uninterrupted movement of the beam across at least part of an irradiation target to deliver doses of the charged particles that are based on the pulses, the uninterrupted movement being independent of the RF cycles of the particle accelerator, (ii) for positions at which the particle beam delivers dose in synchronism with the RF cycles, to store information identifying a location and an amount of dose delivered, (iii) to compare a cumulative dose delivered at each position to a target cumulative dose, and (iv) if the cumulative dose does not match the target cumulative dose at specific positions, to control the current in order to move the beam so as to deliver additional dose to the specific positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A particle therapy system comprising:
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a particle accelerator to output a beam comprised of pulses of charged particles, the pulses being synchronized to radio frequency (RF) cycles of the particle accelerator; and a scanning system to scan the beam across at least part of an irradiation target, the scanning system comprising; 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 that are based on the pulses to the irradiation target, the uninterrupted movement being independent of the RF cycles of the particle accelerator; and
(ii) to determine, in synchronism with delivery of doses and the RF cycles, information identifying the doses actually delivered at different positions along the depth-wise layer.
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19. A particle therapy system comprising:
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a particle accelerator to output a beam comprised of pulses of charged particles, the pulses being synchronized to radio frequency (RF) cycles of the particle accelerator; and a scanning system to scan the beam across at least part of an irradiation target, the scanning system comprising; a scanning magnet to move the beam during scanning, where a position of the beam corresponds to a current of the scanning magnet; and an open loop control system (i) to control the current to produce uninterrupted movement of the particle beam across at least part of a layer of an irradiation target so as to deliver doses of charged particles that are based on the pulses to the irradiation target, the uninterrupted movement being independent of the RF cycles of the particle accelerator, (ii) to record, in synchronism with delivery and the RF cycles, the doses of the particle beam delivered to the irradiation target and at least one of;
coordinates at which the doses were delivered or magnet currents at which the doses were delivered, and (iii) to compensate for deficiencies in the recorded doses relative to corresponding target cumulative doses. - View Dependent Claims (21, 22, 23, 24, 25)
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20. A particle therapy system comprising:
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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, the scanning system comprising; a scanning magnet to move the beam during scanning, where a position of the beam corresponds to a current of the scanning magnet; and an open loop control system (i) to control the current to produce uninterrupted movement of the particle beam across at least part of a layer of an irradiation target, (ii) to record, in synchronism with delivery, doses of the particle beam delivered to the irradiation target and at least one of;
coordinates at which the doses were delivered or magnet currents at which the doses were delivered, and (iii) to compensate for deficiencies in the recorded doses relative to corresponding target cumulative doses;wherein the particle accelerator comprises; a voltage source to provide a radio frequency (RF) voltage to a cavity to accelerate particles from a plasma column, the cavity having a magnetic field for causing particles accelerated from the plasma column to move orbitally within the cavity; an extraction channel to receive the particles accelerated from the plasma column and to output the received particles from the cavity towards the scanning system; and a regenerator to provide a magnetic field bump within the cavity to thereby change successive orbits of the particles accelerated from the plasma column so that, eventually, particles output to the extraction channel; wherein the magnetic field is between 4 Tesla (T) and 20 T and the magnetic field bump is at most 2 Tesla; and wherein the uninterrupted movement of the particle beam across the at least part of the layer of the irradiation target is not dependent upon the RF frequency.
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Specification