US 6,774,383 B2Granted

Particle therapy system

AssigneeHitachi, Ltd.

InventorsTetsuro Norimine, Masumi Umezawa, Kazuo Hiramoto

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Abstract

A particle therapy system is provided which can simply and quickly correct a beam orbit. In a particle therapy system provided with an irradiation facility comprising a first beam transport system for receiving a beam and transporting the beam to the patient side, and an irradiation nozzle for forming an irradiation field of the beam, the particle therapy system comprises first beam position monitors for detecting a position upstream of the irradiation nozzle at which the beam passes, second beam position monitors for detecting a position downstream of the irradiation nozzle at which the charged-particle beam passes, and first and second steering magnets. Correction bending amounts for causing the beam to be coincident with a predetermined orbit after the correction are determined in accordance with detected results from the first and second beam position monitors, and first and second steering magnets are excited under control so that the determined correction bending amounts are obtained.

Claims19

Dependent claims

A particle therapy system comprising an accelerator for accelerating a charged-particle beam to a set level of energy, and a rotating irradiation facility for irradiating the charged-particle beam extracted from said accelerator, said irradiation facility comprising first beam transport appratus for transporting the charged-particle beam extracted from said accelerator, and irradiation field forming appratus for forming an irradiation field of the charged-particle beam transported by said first beam transport appratus, wherein said particle therapy system further comprises:

first beam position detecting appratus arranged along an orbit of the charged-particle beam downstream of a most downstream one of magnets provided in said first beam transport appratus, and detecting a position at which the charged-particle beam passes;
second beam position detecting appratus arranged along the orbit of the charged-particle beam downstream of said first beam position detecting appratus, and detecting a position at which the charged-particle beam passes;
a first steering magnet and a second steering magnet both provided in said first beam transport appratus upstream of said first beam position detecting appratus;
first displacement amount computing appratus for determining respective first displacement amounts, by which the position of the charged-particle beam is to be displaced by said first and second steering magnets, in accordance with detected signals outputted from said first and second beam position detecting appratus;
and
first cotrol system for controlling respective excitation currents of said first and second steering magnets in accordance with the respective first displacement amounts.

3 more elements

A particle therapy system comprising an accelerator for accelerating a charged-particle beam to a set level of energy, a rotating irradiation facility for irradiating the charged-particle beam extracted from said accelerator, and second beam transport apparatus for transporting the charged-particle beam extracted from said accelerator to said irradiation facility, wherein said particle therapy system further comprises:

third beam position detecting apparatus for detecting a position in said second beam transport beam transport apparatus at which the charged-particle beam passes;
fourth beam position detecting apparatus for detecting, downstream of said third beam position detecting apparatus, a position in said second beam transport apparatus at which the charged-particle beam passes;
a third steering magnet and a fourth steering magnet both provided in said second beam transport apparatus upstream of said third beam position detecting apparatus;
second displacement amount computing apparatus for determining second displacement amounts, by which the position of the charged-particle beam is to be displaced by said third and fourth steering magnets, in accordance with detected signals outputted from said third and fourth beam position detecting apparatus;
and
second control system for controlling respective excitation currents of said third and fourth steering magnets in accordance with the respective second displacement amounts.

3 more elements

A particle therapy system comprising an accelerator for accelerating a charged-particle beam to a set level of energy, a stationary irradiation facility for irradiating the charged-particle beam, and beam transport apparatus for transporting the charged-particle beam extracted from said accelerator to said irradiation facility, wherein said particle therapy system further comprises:

first beam position detecting apparatus arranged along an orbit of the charged-particle beam downstream of a most downstream one of magnets provided in said beam transport apparatus, and detecting a position at which the charged-particle beam passes;
second beam position detecting apparatus arranged along the orbit of the charged-particle beam downstream of said first beam position detecting apparatus, and detecting a position at which the charged-particle beam passes;
a first steering magnet and a second steering magnet both provided in said beam transport apparatus upstream of said first beam position detecting apparatus;
first displacement amount computing apparatus for determining respective first displacement amounts, by which the position of the charged-particle beam is to be displaced by said first and second steering magnets, in accordance with detected signals outputted from said first and second beam position detecting apparatus;
and
first cotrol system for controlling respective excitation currents of said first and second steering magnets in accordance with the respective first displacement amounts.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/395,144Filed 25 Mar 2003
Priority: JP 2002-08586226 Mar 2002
Published: US 2003/0183779 A12 Oct 2003
Granted: 10 Aug 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

A61N 5/1048
X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy: monitoring, verifying, controlling systems and methods
G21K 1/093
Deviation, concentration or focusing of the beam by electric or magnetic means: by magnetic means
G21K 5/04
Irradiation devices: with beam-forming means
H05H 7/04
Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00: magnet systems , e.g. undulators, wigglers ; Energisation thereof