Radiant energy – Source with recording detector – Using a stimulable phosphor
Patent
1995-08-09
1997-02-11
Fields, Carolyn E.
Radiant energy
Source with recording detector
Using a stimulable phosphor
250586, G01N 2304
Patent
active
056024029
ABSTRACT:
A stimulable phosphor sheet, on which a radiation image has been stored, is exposed to stimulating rays, which cause it to emit light in proportion to the amount of energy stored thereon during its exposure to radiation. The light, which is emitted from the front surface of the stimulable phosphor sheet, and the light, which is emitted from the back surface of the stimulable phosphor sheet, are detected respectively with two photoelectric read-out devices, and two image signals are thereby obtained. The two image signals are added to each other in a predetermined addition ratio. A change of the addition ratio with the passage of time is compensated for by detecting predetermined reference light with the two photoelectric read-out devices, two reference signals being thereby obtained, calculating a representative value of each of the two reference signals, two representative values being thereby obtained, and utilizing the ratio between the two representative values for the compensation for the change of the addition ratio.
REFERENCES:
patent: 4346295 (1982-08-01), Tanaka et al.
patent: 4356398 (1982-10-01), Komaki et al.
patent: 4689482 (1987-08-01), Horikawa et al.
patent: 5477059 (1995-12-01), Arakawa
Fields Carolyn E.
Fuji Photo Film Co. , Ltd.
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