X-ray imaging apparatus

Details X-ray imaging apparatus X-ray imaging apparatus

1991-01-09

1993-01-05

Porter, David P.

X-ray or gamma ray systems or devices

Electronic circuit

Exposure timer

378 62, 378108, 358111, H05G 164

Patent

active

051777770

ABSTRACT:
An X-ray imaging apparatus has an image intensifier for converting an X-ray shadowgram of a patient into visible light. A primary lens group collimates the visible light and a secondary lens group forms the image carried by the visible light on a TV imaging device. The primary lens group is provided with a beam splitter for reflecting a part of the light output by the image intensifier toward the secondary lens group and transmitting the remainder thereof to a pick-up optical system for detecting the brightness of the image output by the image intensifier. The exposure of the patient to X-rays can be controlled on the basis of the detected brightness.

REFERENCES:
patent: 4063092 (1977-12-01), Berdahl
patent: 4355331 (1982-10-01), Georges et al.
patent: 4675731 (1987-06-01), Takasu et al.
patent: 4706268 (1987-11-01), Onodera
patent: 4749257 (1988-06-01), Klausz
patent: 4918534 (1990-04-01), Lam et al.
patent: 4982418 (1991-01-01), Kuehnel
patent: 5029338 (1991-07-01), Aichinger et al.

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