Patent ID: 6931100
Filing Date: 2005-08-16
Classification: A61N,G21K

Abstract:
1. A method for controlling a multi-leaf collimator comprising a first leaf plate driving body provided on a first side of the collimator and a second leaf plate driving body provided on a second side of the collimator, the first and second leaf plate driving bodies each including a plurality of movable leaf plates and one rotating device for moving said plurality of leaf plates along one direction by engaging with said plurality of leaf plates, and the plurality of leaf plates of said leaf plate driving body on the first side and the plurality of leaf plates of said leaf plate driving body on the second side being disposed in an opposing relation to form an irradiation field of a radiation beam between the opposing leaf plates, wherein the method comprises the acts of: moving said plurality of leaf plates along another direction across said one direction and engaging them with said rotating device; rotating said rotating device; and disengaging one of said plurality of leaf plates which reaches a predetermined position with said rotating device by moving said leaf plate in an opposed direction to said another direction.