Means for generating an X-ray exposure command in response to a

Details Means for generating an X-ray exposure command in response to a Means for generating an X-ray exposure command in response to a

1977-06-30

1980-01-22

Smith, Alfred E.

Radiant energy

Luminophor irradiation

358111, H05G 130

Patent

active

041851986

ABSTRACT:
An X-ray apparatus for diagnosis which utilizes an X-ray television device includes a video circuit for setting a particular area of an X-ray image, a video gate circuit for selecting a corresponding signal component from a video signal representative of the X-ray image, a command pulse generator adapted to detect a variation in level of the video signal as caused by a contrast medium and generate an X-ray exposure command pulse when the signal level exceeds a threshold level, and a pulse shaping circuit for generating timing pulses for these circuits. The particular area of the X-ray image is set by the operator while observing the X-ray image on the TV monitor. When a patient drinks the contrast medium of barium and at the same time an operator depresses a start switch for photographing the apparatus detects the variation in level of the video signal as caused by barium to permit the X-ray exposure command signal to be issued for photographing so that the predetermined area of the X-ray image can be automatically photographed.

REFERENCES:
patent: 3009079 (1961-11-01), Jacobs
patent: 3257506 (1966-06-01), Siepmann
patent: 3580997 (1971-05-01), Webb et al.
patent: 3824399 (1974-07-01), Bjork et al.
patent: 3924064 (1975-12-01), Nomura et al.
patent: 3996420 (1976-12-01), Geluk

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