Patent ID: 7579608
Filing Date: 2009-08-25
Classification: A61B,A61N,G21K

Abstract:
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.