G - Physics – 21 – K
Patent
G - Physics
21
K
358/28
G21K 1/02 (2006.01) A61B 6/06 (2006.01) G21K 1/04 (2006.01)
Patent
CA 1170789
COMPACT X-RAY COLLIMATOR Abstract of the Disclosure An X-ray collimator comprising an X-ray shielded enclosure having aligned entrance and exit apertures for permitting passage of an X-ray beam, the exit aperture having a generally rectangular configuration defined by edges of two orthogonally disposed pairs of opposing rotatable exit shutter elements. Each of the exit shutter elements has a generally semi-cylindri- cal configuration and is concentrically disposed about a respec- tive axis of rotation. Each pair of semi-cylindrical exit shutter elements is mounted for opposing rotatable movement within the other pair of semi-cylindrical exit shutter elements. The entrance aperture of the housing may be defined by two orthogonally disposed pairs of opposing shutter plates, one pair thereof being directly linked to an associated pair of semi- cylindrical exit shutter elements for corresponding movement therewith.
375662
Smart & Biggar
Varian Medical Systems Inc.
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