Patent ID: 6530874
Filing Date: 2003-03-11
Classification: A61N

Abstract:
A synchronized moving radiation shield apparatus including at least one shielding block disposed under a radiation pathway of a radiation therapy unit in such a manner that a radiation field is formed with said shielding block, wherein an affected portion of a person is exposed to radiation through said radiation field while radiation therapy of a portion, other than said affected portion, of the person, is shielded by said shielding block, said synchronized moving radiation shield apparatus comprising:a movable portion for movably holding said shielding block while not blocking the passing of radiation through said radiation field; drive means, connected to said movable portion, for moving said radiation field to a specific position; and control means for controlling said drive means in such a manner that said radiation field is movable in matching to a variation in position of said affected portion, where said control means controls said drive means in such a manner that said radiation field is located at a position corresponding to the affected portion while sequentially estimating the motion of the affected portion.