X-Ray examination apparatus

Details X-Ray examination apparatus X-Ray examination apparatus

1983-02-22

1984-09-18

Smith, Afred E.

X-ray or gamma ray systems or devices

Electronic circuit

Exposure timer

358111, 378 97, 378108, H05G 130, H05G 136

Patent

active

044728263

ABSTRACT:
In an X-ray examination apparatus comprising an image intensifier tube and an optical light distribution system there is included an image field selector, by means of which, using a subbeam diverted from the imaging beam, a measurement field can be selected and by means of which this measurement field or a boundary outline thereof can be projected back into the imaging radiation path. Thus, it is achieved that during an examination stage an indication of the extent and location of a measurement field which is considered to be relevant for controlling the desired exposure for pictures to be produced, can be constantly displayed on the image screen of the television monitor.

REFERENCES:
patent: 2441324 (1948-05-01), Morgan et al.
patent: 4044264 (1977-08-01), Lutz et al.
patent: 4171484 (1979-10-01), Hunt
patent: 4335307 (1982-06-01), De Vries et al.

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