Radiation image read-out apparatus

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

1991-01-11

1991-12-10

Fields, Carolyn E.

Radiant energy

Automatic/serial detection of similar sources

250347, G03C 516

Patent

active

050721178

ABSTRACT:
In a radiation image read-out apparatus, a stimulable phosphor sheet, on which a radiation image has been stored, is scanned with a stimulating ray beam, which causes the stimulable phosphor sheet to emit light in proportion to the amount of energy stored thereon during its exposure to radiation. The light, which is emitted by part of the stimulable phosphor sheet being scanned with the stimulating ray beam, is photoelectrically detected and converted into an image signal. The beam diameter of the stimulating ray beam is adjusted such that it is larger than the size of each picture element in the radiation image. Each picture element is scanned with the stimulating ray beam by a plurality of scanning steps such that the position, which is scanned, is shifted for different scanning steps. A filtering device is provided, with which a single image signal component representing each picture element is generated from a plurality of image signal components, which are obtained during the plurality of scanning steps for each picture element.

REFERENCES:
patent: 4258264 (1981-03-01), Kotera et al.
patent: 4748326 (1988-05-01), Mori et al.
patent: 4894540 (1990-01-01), Komatsu

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