Title:
BEAM DELIVERY SYSTEM AND PARTICLE BEAM THERAPY DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/038731
Kind Code:
A1
Abstract:
The objective of the present invention is to deliver a charged particle beam whereof the variation in the number of particles at the edge portions follows a smooth distribution, without causing the beam size to become unnecessarily large. The beam delivery system (30) is equipped with a beam shaping device (10) comprising: a pre-stage quadrupole electromagnet (3) for reducing the width of the distribution of an x angular component (x'), which is a slope in an x direction relative to the progression direction of the charged particles in the beam, wherein the x direction is a direction that is orthogonal to the progression direction of the charged particle beam, originates from the beam center, and traverses an abrupt edge portion; a penumbra enlargement device (1) for smoothing the shape of the edge portions in the particle number distribution of the x angular component (x') in the beam that has passed through the pre-stage quadrupole electromagnet (3); and a post-stage quadrupole electromagnet (4) for adjusting the betatron phase in the phase space distribution in the x direction of the beam that has passed through the penumbra enlargement device (1). The post-stage quadrupole electromagnet (4) adjusts the phase lead angle of the betatron phase from the penumbra enlargement device (1) to the isocenter (IC) in a range of an odd multiple of 90 degrees ± 45 degrees.
Inventors:
ODAWARA SHUHEI (JP)
HANAKAWA KAZUSHI (JP)
HANAKAWA KAZUSHI (JP)
Application Number:
PCT/JP2014/074204
Publication Date:
March 17, 2016
Filing Date:
September 12, 2014
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H05H7/04; A61N5/10; G21K1/00; G21K1/093; G21K1/10; G21K5/04; H05H13/04
Foreign References:
| JP4639401B2 | 2011-02-23 | |||
| JP2003282300A | 2003-10-03 |
Other References:
See also references of EP 3193567A4
Attorney, Agent or Firm:
OIWA Masuo et al. (JP)
Masuo Oiwa (JP)
Masuo Oiwa (JP)
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