Patent ID: 6792078
Filing Date: 2004-09-14
Classification: A61N,G21K

Abstract:
A multi-leaf collimator comprising leaf plate driving bodies, each including a plurality of movable leaf plates and provided respectively on one side and the other side, the plurality of leaf plates of said leaf plate driving body on one side and the plurality of leaf plates of said leaf plate driving body on the other side being disposed in an opposing relation to form an irradiation field of a radiation beam between the opposing leaf plates,wherein each of said leaf plate driving bodies comprises one rotating device for moving said plurality of leaf plates along one direction by engaging with said plurality of leaf plates; and driving force transmitting/cut-off device for transmitting driving force of said rotating device to said plurality of leaf plates by moving said plurality of leaf plates along the other direction across said one direction and engaging them with said rotating device and cutting off said driving force selectively for each leaf plate by disengaging a selected one of said plurality of leaf plates with said rotating device.