Method of adjusting radiation image read-out conditions

Details Method of adjusting radiation image read-out conditions Method of adjusting radiation image read-out conditions

1985-01-28

1987-07-21

Fields, Carolyn E.

Radiant energy

Automatic/serial detection of similar sources

2504841, 364414, G03C 516

Patent

active

046820280

ABSTRACT:
A method of adjusting radiation image read-out conditions used in a radiation image recording and reproducing system wherein preliminary read-out and final read-out are conducted for detecting the radiation image stored in a stimulable phosphor sheet. The method comprises determining a histogram of the amount of light emitted by the stimulable phosphor sheet when it is exposed to stimulating rays during the preliminary read-out. From the histogram, the maximum light emission amount Smax and the minimum light emission amount Smin of a desired image information range are calculated. Read-out conditions are adjusted so that Smax and Smin correspond respectively to the maximum signal level Qmax and the minimum signal level Qmin of a desired input signal range in an image processing apparatus which are determined by the maximum density Dmax and the minimum density Dmin of a correct density range in a finally reproduced visible image.

REFERENCES:
patent: 4091416 (1978-05-01), Riethmuller et al.
patent: 4276473 (1981-06-01), Kato et al.
patent: 4302672 (1981-11-01), Kato et al.
patent: 4310886 (1982-01-01), Kato et al.
patent: 4496973 (1985-01-01), Horikawa et al.

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