Luminescent storage screen and read-out apparatus therefor

Details Luminescent storage screen and read-out apparatus therefor Luminescent storage screen and read-out apparatus therefor

1989-04-03

1990-08-21

Hannaher, Constantine

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

2503272, G01T 1105, G03B 4200

Patent

active

049509071

ABSTRACT:
A luminescent storage screen of the type used to latently store an x-ray image in an x-ray diagnostics installation has two phosphor layers separated by and carried on a carrier disposed therebetween. The carrier is substantially transparent to x-radiation, so that the x-ray image is stored in both phosphor layers. A read-out apparatus for the storage screen includes a read-out beam generator which generates a single read-out beam which is directed at one side of the storage screen. The carrier is transmissive to the read-out beam, but is impermeable to light emitted by the phosphor layers, so that the light emitted by each phosphor layer during simultaneous read-out can be separately collected and detected. The single read-out beam simultaneously scans both phosphor layers, so that the resulting images are automatically correlated. The images are then combined in a known manner to form a single, displayed image.

REFERENCES:
patent: 4346295 (1982-08-01), Tanaka et al.
patent: 4737641 (1988-04-01), Lange et al.
patent: 4778995 (1988-10-01), Kulpinski et al.
patent: 4818876 (1989-04-01), Agano et al.
Ishigaki et al., One-Shot Dual Energy Subtraction Imaging, Oct. 1986, pp. 271-273. Radiology 1986.

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