Patent ID: 8873704

Claim:
An x-ray device comprising: an x-ray source that emits x-rays, having an intensity profile, in a beam that proceeds through a plane; said x-ray source being mounted to rotate around a rotation axis while emitting said x-rays in said beam, said rotation axis being perpendicular to said plane; a filter body comprised of material that attenuates said x-rays; said filter body having a propeller shape and comprising two blades connected by an axle that proceeds between said two blades, said axle being oriented perpendicularly to said plane; said axle being rotatable to move said two blades through different angles in said x-rays, said axle producing substantially no attenuation of said x-rays; and said two blades having respectively different cross-sections that cause each blade to differently attenuate said x-rays dependent on the angle at which each blade is placed by rotation of said axle, to shape said intensity profile of x-rays attenuated by said two blades.