X-ray apparatus

Details X-ray apparatus X-ray apparatus

1991-11-13

1993-08-17

Porta, David P.

X-ray or gamma ray systems or devices

Beam control

Collimator

378145, 378147, 378160, 378153, G21K 102

Patent

active

052375994

ABSTRACT:
In order to perform stereoradiography, an X-ray apparatus utilizes an X-ray tube having a pair of X-ray focal points. The X-ray beams are alternately irradiated from the focal points toward an image intensifier through a patient and are limited by an X-ray beam limiting device. The device shapes the irradiated X-ray beams onto a circular detection surface of the image intensifier into a polygon such as octagon. The X-ray irradiation field on the detection surface can be circumscribed to a circular input window (i.e. effective input area), preventing the field from going beyond the detection surface. Thus, direct X-ray leaking over the image intensifier is avoidable.

REFERENCES:
patent: 4766603 (1988-08-01), Okabe et al.

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