Radio-diagnostic equipment with shutter

Details Radio-diagnostic equipment with shutter Radio-diagnostic equipment with shutter

1987-05-20

1989-03-28

Fields, Carolyn E.

X-ray or gamma ray systems or devices

Beam control

Collimator

378150, 378151, G21K 104

Patent

active

048171255

ABSTRACT:
Radio-diagnostic equipment includes an X-ray tube and a shutter which defines an aperture of modifiable size for allowing X-rays to pass therethrough. The shutter consists of a plurality of individual lamella which lie adjacent each other about the sides of the aperture and can be adjusted individually in a longitudinal direction depending on the size of the object under examination. An X-ray image intensifier and a television camera coupled to it generate a video signal and a monitor reproduces an image of the video signal. An evaluating circuit derives a control signal from the video signal which is applied to a position adjusting device including spring-like elements which can be deflected from an initial position by physical forces for controlling the positioning of each lamella.

REFERENCES:
patent: 3448270 (1969-06-01), Peyser
patent: 3631249 (1971-12-01), Friede et al.
patent: 3655963 (1972-04-01), Brunnee et al.
patent: 3912936 (1975-10-01), Cunninghame et al.
patent: 4659544 (1987-04-01), Sawayama et al.
patent: 4672652 (1987-06-01), Huttenrauch et al.
patent: 4715056 (1987-12-01), Vlasbloem et al.
patent: 4739173 (1988-04-01), Blosser et al.
patent: 4754147 (1988-06-01), Maughan et al.
Journal "METALL" 39, 1, 1985, pp. 34-38; Jan. issue., (* corresponds to U.S. Pat. No. 3,631,249).

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