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US 5,889,834 AGranted
Blade collimator for radiation therapy
AssigneeBrainLAB Med. Computersysteme GmbH
InventorsStefan Vilsmeier, Michael Bertram, Joseph Doyle, Ueli Graf
Life of this patent
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Abstract
The accuracy of radiation therapy is enhanced with the blade collimator of the claimed invention. Particularly, this collimator includes a support device for supporting at least two sets of radiation attenuating blades in a single plane or layer. The blades are reciprocally movable within this support. Shaping of the therapy may be increased by constructing the blades to include a varying width increasing from the central blade toward the exterior blades.
Claims24
Blade collimator for radiation therapy, comprising a support device,
- two opposing sets of blades mounted in one layer in said support device, each blade capable of reciprocable movement in said support device and having a dimension perpendicular to the movement,
- each set of blades comprising a central blade adjacent to the blades of the other set, an exterior blade, and a blade interposed between the central blade and the exterior blade, the dimension of the exterior blade being greater than the dimension of the interposed blade and the dimension of the interposed blade being greater than the dimension of the central blade.
Dependencies are inferred from the claim text.