US 7,060,997 B2Granted

Particle therapy system

AssigneeHitachi, Ltd.

InventorsTetsuro Norimine, Masumi Umezawa, Kazuo Hiramoto

Life of this patent

Estimating the term…

Loading patent…

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.

Claims1

Dependent claims

A charged-particle beam transport apparatus for transporting a charged-particle beam extracted from an accelerator which accelerates the charged-particle beam to a set level of energy, comprising:

first beam position detecting apparatus for detecting a position at which the charged-particle beam passes;
second beam position detecting apparatus arranged downstream of said first beam position detecting apparatus for detecting a position at which the charged-particle beam passes;
a first steering magnet and a second steering magnet both arranged upstream of said first beam position detecting apparatus;
displacement amount computing apparatus for determining respective 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
control system for controlling respective excitation currents of said first and second steering magnets in accordance with said respective displacement amounts.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/185,717Filed 21 Jul 2005 · continuation
Priority: JP 2002-8586226 Mar 2002
Published: US 2005/0247890 A110 Nov 2005
Granted: 13 Jun 2006
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

Family

Application10/395,144Parent of this continuation · filed 25 Mar 2003
Application10/872,500Parent of this continuation · filed 22 Jun 2004
US 6,774,383 B2Parent of this continuation · filed 10 Aug 2004
US 2005/0247890 A1Pre-grant publication · published 10 Nov 2005
US 6,936,832 B2Parent of this continuation
US 2003/0183779 A1Published application
US 2004/0232356 A1Published application
US 7,060,997 B2This patent

From the US filing history. Foreign family members aren’t listed.