Gain setting device for radiation image read out system

Details Gain setting device for radiation image read out system Gain setting device for radiation image read out system

1980-07-11

1983-01-11

Smith, Alfred E.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

250205, 2503541, H05B 3300, G01J 132, G01T 100

Patent

active

043683843

ABSTRACT:
In a radiation image recording system in which a stimulable phosphor plate is exposed to an imagewise radiation to store the energy of the radiation and record a latent image of a radiation image, the stimulable phosphor plate is then exposed to stimulating rays to emit light according to the stored energy of radiation, and the emitted light is detected to obtain an image signal, a radiation image read out device is provided with a gain setting device for selecting or presetting the gain of the read out system to obtain a final radiation image of desirable density and contrast. The gain setting device includes a means for taking out a part of the stimulating rays and introducing the taken out part of the stimulating rays into a photodetector. The output of the photodetector is compared with a standard signal level and the gain of the read out system is controlled to make the output equal to the standard signal level.

REFERENCES:
patent: 3171032 (1965-02-01), Holt
patent: 3487209 (1969-12-01), Perry
patent: 3670202 (1972-06-01), Paine et al.
patent: 3859527 (1975-01-01), Luckey
patent: 4258264 (1981-03-01), Kotera et al.

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