Radiation image read-out apparatus

Details Radiation image read-out apparatus Radiation image read-out apparatus

1986-10-17

1990-02-06

Fields, Carolyn E.

Radiant energy

Automatic/serial detection of similar sources

2504841, G03C 516

Patent

active

048990493

ABSTRACT:
A radiation image read-out apparatus comprises a system for emitting stimulating rays to a stimulable phosphor sheet carrying a radiation image of an object stored thereon by exposure to a radiation passing through the object, a photodetector for detecting light emitted by the stimulable phosphor sheet when it is exposed to stimulating rays, an amplifier for amplifying a read-out image signal generated by the photodectector, and A/D converter for digitizing the output of the amplifier, and a predictor for predicting the scattered radiation amount stored on the stimulable phosphor sheet. An operation circuit is positioned between the amplifier and the photodetector for subtracting a signal component representing the scattered radiation amount from the read-out image signal on the basis of the scattered radiation amount predicted by the scattered radiation amount predictor. An expander is positioned between the operation circuit and the amplifier for adjusting an image signal generated by the operation circuit to a predetermined level.

REFERENCES:
patent: 4620097 (1986-10-01), Tanaka et al.
patent: 4728791 (1988-03-01), Goto

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