The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2015
Filed:
Jun. 12, 2013
Mitsubishi Electric Corporation, Chiyoda-ku, JP;
Takaaki Iwata, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Chiyoda-Ku, Tokyo, JP;
Abstract
When IMRT technology for a radiation therapy system utilizing an X-ray or the like is applied to a particle beam therapy system having a conventional wobbler system, it is required to utilize two or more boluses. The present invention solves the problem of excess irradiation in IMRT by a particle beam therapy system. More specifically, the problem of excess irradiation in IMRT by a particle beam therapy system is solved by raising the irradiation flexibility in the depth direction, without utilizing a bolus. A particle beam irradiation apparatus has a scanning irradiation system that performs scanning with a charged particle beam accelerated by an accelerator and is mounted in a rotating gantry for rotating the irradiation direction of the charged particle beam. The particle beam irradiation apparatus comprises a columnar-irradiation-field generation apparatus that generates a columnar irradiation field by enlarging the Bragg peak of the charged particle beam.