X-ray examination means

Details X-ray examination means X-ray examination means

1982-09-16

1984-08-07

Smith, Alfred E.

X-ray or gamma ray systems or devices

Beam control

Collimator

378115, 378151, G21K 104, H05G 158, H05G 166

Patent

active

044647786

ABSTRACT:
An exemplary embodiment comprises an X-ray tube having at least two selectively engageable different focal points, a primary radiation diaphragm adjusted relative to the X-ray tube, and comprising an image layer. When changing the focal point, an adjustment of the primary radiation diaphragm occurs in prior X-ray tubes, the adjustment resulting in a displacement of the illuminated beam field on the image layer. The present disclosure provides that the diaphragm plates of the primary radiation diaphragm are synchronously displaced in the same direction and by approximately the same amount by which the focal point is displaced when switching from the one to the other focal point. An inventive X-ray examination system is particularly suited for employment in X-ray diagnostics.

REFERENCES:
patent: 2497755 (1950-02-01), Berggren
patent: 2942126 (1960-06-01), Silbermann
patent: 3733487 (1973-05-01), Louche et al.
patent: 3857039 (1974-12-01), Franke et al.
patent: 3934140 (1976-01-01), Dutertre et al.
patent: 4097748 (1978-06-01), Monvoisin
patent: 4145616 (1979-03-01), Tanabe
patent: 4329590 (1982-05-01), Adelmeyer

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