Patent ID: 8139719

Claim:
A device for non-symmetrical X-ray beam collimation of a symmetrical X-ray beam from an X-ray tube in a C-arm X-ray system, wherein the X-ray tube is at least partially enclosed in a housing comprising a first collimator attached to the housing, the first collimator defining an opening through which passes the symmetrical X-ray beam from the X-ray tube, wherein the device is attached to the first collimator, the device comprising a second collimator for non-symmetrical X-ray beam collimation of the X-ray beam exiting the first collimator, the second collimator comprising: a) an X-ray absorbing plate for asymmetrically collimating the X-ray beam exiting the first collimator; b) a sleigh, wherein the X-ray absorbing plate is movably attached to the sleigh for moving the X-ray absorbing plate in increments of tenths of a millimeter; wherein the housing is movably attached to a rail system for moving the housing to align the housing with respect to the detector.