| US 7,579,608 B2 | ||
| Particle-beam treatment system | ||
| Osamu Takahashi, Tokyo (Japan); Yuehu Pu, Tokyo (Japan); Hisashi Harada, Tokyo (Japan); Masahiro Ikeda, Tokyo (Japan); Yasuyuki Takatani, Tokyo (Japan); and Hiroshi Otani, Tokyo (Japan) | ||
| Assigned to Mitsubishi Electric Corporation, Chiyoda-Ku, Tokyo (Japan) | ||
| Filed on Oct. 11, 2007, as Appl. No. 11/870,512. | ||
| Claims priority of application No. 2007-146988 (JP), filed on Jun. 01, 2007. | ||
| Prior Publication US 2008/0298553 A1, Dec. 04, 2008 | ||
| Int. Cl. G21K 5/04 (2006.01) | ||
| U.S. Cl. 250—492.3 [378/152] | 9 Claims |
| 1. A particle-beam treatment system in which, in the case where, during particle-beam irradiation, multi-layer conformal irradiation
is performed while setting of the shape of a multileaf collimator in an irradiation head is changed, the shape of the multileaf
collimator is detected by a leaf-position detection mechanism, the particle-beam treatment system comprising:
an optical shape-monitoring unit mounted attachably and detachably in the snout portion at the downstream side of the multileaf
collimator, the optical shape-monitoring unit having a shape-monitoring mirror, opposing the multileaf collimator, for monitoring
the shape of the multileaf collimator;
a video camera for shooting the shape, of the multileaf collimator, which is reflected by the shape-monitoring mirror; and
an image monitor for displaying an image of the video camera that shoots the shape of the multileaf collimator, the shape
of the multileaf collimator being able to be monitored during particle-beam irradiation.
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