Binary screen, system and method for single pulse dual energy ra

Details Binary screen, system and method for single pulse dual energy ra Binary screen, system and method for single pulse dual energy ra

1991-07-24

1993-06-01

Fields, Carolyn E.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

250367, 2504831, G21K 400

Patent

active

052162524

ABSTRACT:
A binary screen, system and method for performing dual energy radiographic imaging, using single pulse x-rays, are depicted. The binary screen includes a first phosphor which emits light of a first wavelength and a second phosphor which emits light of a second wavelength. The first and second phosphors are heterogeneously dispersed in the binary screen. The first phosphor is preferably Gd.sub.2 O.sub.2 S:Eu.sup.+3 and the second phosphor is preferably Y.sub.2 O.sub.2 S:Gd.sup.+3. The second phosphor can also be Y.sub.2 O.sub.3 :Gd, Y.sub.2 O.sub.2 S:Pr or Y.sub.2 O.sub.2 S:Neodymium.

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Brody, et al., "A Method For Selective Tissue And Bone Visualization Using Dual Energy Scanned Projection Radiograph", Medical Physics, vol. 8(3), May/Jun. 1981 pp. 353-357.
Ergun, et al., "Single-Exposure Dual-Energy Computed Radiography: Improved Detection And Processing Radiology", Medical Physics, vol. 174, No. 1, 1990 pp. 243-249.
Heron, et al., "X-Ray Imaging With Two-Dimensional Charge-Coupled Device (CCD) Arrays", SPIE, vol. 486 Medical Imaging and Instrumentation 1984 (1984).

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