MULTI-LEAF COLLIMATOR FOR PROTON BEAM THERAPY Russian patent published in 2013 - IPC A61N5/10 G21K1/04 

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to devices for beam teletherapy. A collimator comprises a body with a base, a cover and side plates wherein the base is parallel with two assemblies of lamination stacks at the same height each of which is movable by an individual drive parallel with the base and perpendicular to an axis of symmetry of the collimator. The drives are individual for each of the lamination stacks and coupled with the most distant end faced from a geometric axis of the collimator through individual screw gears. The lamination stacks have the same thickness, lateral "П"-profile and integrated into an assembly. The lower lamination stacks of the assemblies have a convex-convex "П"-profile, while internal surfaces of the base and cover have cavities for profile projections of the respective lamination stacks. Each end face involved in beam aperture formation represents alternating "П"-projections and slots with the projections and slots of the lamination stack of one assembly match, while those of the other lamination stack are staggered in relation thereof.

EFFECT: using the invention provides higher rate and accuracy of the pre-set beam aperture formation.

7 cl, 7 dwg