G - Physics – 03 – C
Patent
G - Physics
03
C
96/197, 96/77
G03C 5/17 (2006.01)
Patent
CA 1038682
ABSTRACT OF THE DISCLOSURE A combination of photosensitive materials suited for radiography comprising : (1) a silver halide photographic material comprising a support and silver halide having associated therewith at least one colour coupler being capable of producing in said material a negative silver and colour image, and (2) at least one X-ray fluorescent intensifying screen material comprising a phosphor layer, which contains a phosphor or a phosphor mixture consisting wholly or mainly of a rare earth metal-activated lanthanum oxychloride or lanthanum oxybromide, said phosphor or phosphor mixture having more than half its spectral emission above 410 nm, more than half its visible light spectral emission betwenn 400 and 500 nm and its maximum emission peak below 500 nm, and wherein said phosphor layer has a coverage of lanthanum oxyhalide phosphor of 100 to 800 g per sq.m, said screen material has an intensification factor of at least 20 at 40 kV and at least 25 at 80 kV; and the intensification factor of said phosphor layer is at least 2 times as high as that of a lead barium sulphate phosphor layer having substantial indentity with regard to layer thickness, binder composition phosphor particle size and phosphor content per sq.m.
208612
Bollen Romain H.
Vandenabeele Hubert
Agfa-Gevaert Naamloze Vennootschap
Na
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