Phosphor for X-ray intensifying screen and X-ray intensifying sc

Details Phosphor for X-ray intensifying screen and X-ray intensifying sc Phosphor for X-ray intensifying screen and X-ray intensifying sc

1990-12-21

1991-12-31

Cooper, Jack

Stock material or miscellaneous articles

Composite

Of inorganic material

2504831, 2504861, 2523014H, 2523014R, 2523016R, C09K 1178

Patent

active

050771450

ABSTRACT:
A phosphor for an X-ray intensifying screen contains a phosphor mixture of a phosphor represented by BaFBr:mEu.sup.2+ (5.times.10.sup.-4 .ltoreq.m.ltoreq.5.times.10.sup.-2), and a phosphor represented by Y.sub.1-2/3.times. M.sup.x TaO.sub.4 :nNb (10.sup.-5 .ltoreq..times..ltoreq.1, 0.ltoreq.n.ltoreq.0.05, and M is at least one member selected from the group consisting of Ca, Sr, and Cd). An X-ray intensifying screen includes a support and a phosphor layer formed on the support and containing the above phosphor. When this X-ray intensifying screen is used, an X-ray image producing less crossover light and having high graininess and sharpness can be obtained. An exposure amount of an object to be examined can be reduced in medical radiophotography, and radiation diagnostic performance can be improved.

REFERENCES:
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patent: 4088894 (1978-05-01), Rabatin
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patent: 4431922 (1984-12-01), Patten
patent: 4829188 (1989-07-01), Shinomiya et al.
patent: 4839243 (1989-06-01), Shimizu et al.
patent: 4857741 (1989-08-01), Yokota et al.
patent: 4959174 (1990-09-01), Nakajima et al.

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