Filter arrangement for an x-ray apparatus

Details Filter arrangement for an x-ray apparatus Filter arrangement for an x-ray apparatus

1980-07-09

1982-08-31

Smith, Alfred E.

X-ray or gamma ray systems or devices

Beam control

Filter

2505051, G21F 302, G21K 300

Patent

active

043474403

ABSTRACT:
The filter arrangement for an X-ray apparatus contains an X-ray source for emitting a diverging beam of X-rays and a filter plate positioned in the beam of X-rays. The beam is symmetrical with respect to a center beam axis. The filter plate which serves for attenuation of the X-rays before they impinge on a target is mounted on a pivoting axis. The pivoting axis is preferably arranged remote from and transverse to the center beam axis. By pivoting the filter plate about the pivoting axis into a selected position, a selected radiation profile can be obtained on the target. The rotatable filter plate can thus replace a plurality of wedge filters.

REFERENCES:
patent: 2405444 (1946-08-01), Moreau et al.
patent: 2506342 (1950-05-01), Burke
patent: 3248547 (1966-04-01), Van de Geijn
patent: 3631249 (1971-12-01), Friede et al.
patent: 3748487 (1973-07-01), Edholm et al.
patent: 3917954 (1975-11-01), Boge
Kijewski, Chin and Bjangard, "Wedge-shaped dose distributions by computer-controlled collimator motion", Medical Physics, vol. 5, No. 5, Sep./Oct. 1978, pp. 426-429.

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