X-ray collimator for controlling the emission of secondary radia

Details X-ray collimator for controlling the emission of secondary radia X-ray collimator for controlling the emission of secondary radia

1974-07-29

1976-02-03

Lawrence, James W.

Radiant energy

Radiation controlling means

Shields

250511, G21F 504

Patent

active

039366472

ABSTRACT:
In an X-ray collimator including both "near" and "far" shutter mechanisms, the improvement comprising locating two pairs of independently movable near shutters within an outwardly extending lead cone. The cone is positioned against the X-ray generator tube window and as a result the near shutters are in closer proximity to the focal spot of a rotating anode disc of an X-ray tube than heretofore possible. The cone contains an aperture which defines the maximum size of the primary beam passing through the shutter mechanisms; however, the body of the cone and the closer positioning of the near shutters to the focal spot effectively controls and restricts secondary radiation which is emitted at angles different from the primary beam passing through the collimator.

REFERENCES:
patent: 2722611 (1955-11-01), Haupt
patent: 2844736 (1958-07-01), Johns et al.
patent: 3163762 (1964-12-01), Peyser
patent: 3193408 (1965-07-01), Triller
patent: 3206604 (1965-09-01), Burchell
patent: 3304427 (1967-02-01), Peyser
patent: 3609370 (1971-09-01), Peyser
patent: 3829701 (1974-08-01), Hura

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