Binderless storage phosphor screen
AssigneeAgfa-Gevaert
InventorsJohan Lamotte, Jean-Pierre Tahon, Paul Leblans
Life of this patent
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Abstract
An image storage screen or panel, suitable for use in applications related with computed radiography comprises, on a support, a binderless needle-shaped stimulable CsBr:Eu phosphor layer, wherein, besides low amounts of a europium activator or dopant in favor of homogeneous distribution of said activator in the CsBr matrix, presence of well-defined amounts of rubidium halide and cesium chloride in said matrix, and, optionally, further presence of alkali metal, alkaline earth metal and/or metal earth salts, and/or, optionally, other metal salts or oxides, provides a remarkable speed increase, without loss in sharpness.
Claims40
A photostimulable phosphor panel comprising a photostimulable phosphor according to the formula (1)
- CsBr(1-z-αa).RbBrz:aEu (1), wherein
- 5×10−3 mol/mol<z<1.5×10−1 mol/mol,
- 0<a<5×10−4 mol/mol and wherein 2≦α<3.
A photostimulable phosphor panel comprising a photostimulable phosphor according the formula (2)
- Cs(1-z-αa)RbzBr(1-y)Cly:aEu (2) wherein
- 5×10−3 mol/mol<z<1.5×10−1mol/mol;
- 6×10−5 mol/mol<y<1.5×10−2 mol/mol;
- 0<a<1×10−3 mol/mol and wherein 2≦α<3.
A photostimulable phosphor panel comprising a photostimulable phosphor according the formula (1′)
- CsBr(1-z-αa-βx).RbBrz:aEu.xTa (1′), wherein
- 1×10−5 mol/mol<x<1×10−4 mol/mol;
- 1×10−4 mol/mol<z<1.5×10−1 mol/mol;
- 0<a<0.2 mol/mol;
- and wherein 2≦α<3 and 2<β≦5.
A photostimulable phosphor panel comprising a photostimulable phosphor according the formula (2′)
- Cs(1-z-αa-βx)RbzBr(1-y)Cly:aEu.xTa (2′), wherein
- 1×10−5 mol/mol<x<1×10−4 mol/mol;
- 6×10−4 mol/mol<y<1.5×10−2 mol/mol;
- 1×10−4 mol/mol<z<1.5×10−1 mol/mol,
- 0<a<0.2 mol/mol;
- and wherein 2≦α<3 and 2<β≦5.
Dependencies are inferred from the claim text.