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    • 1. 发明授权
    • Radiation image forming system
    • 辐射成像系统
    • US06329662B1
    • 2001-12-11
    • US09188889
    • 1998-11-10
    • Katsutoshi YamaneToshiki FujiwaraRikio Inoue
    • Katsutoshi YamaneToshiki FujiwaraRikio Inoue
    • G21K400
    • G21K4/00C09K11/777G03C5/17G21K2004/06
    • A radiation image forming system utilizing a combination of a silver halide photographic material and radiographic intensifying screens is improved in its radiographic speed and sharpness of the resulting radiation image by employing a rare earth phosphor of the formula MwOwX:M′ (M is Y, La, Gd or Lu; X is a chalcogen atom or a halogen atom; M′ is a rare earth atom which activates M; and w is 2 when X is a chalcogen atom or w is 1 when X is a halogen atom), incorporating into the intensifying screen a fluorescent dye or pigment which absorbs a portion of luminescence emitted by the phosphor and then emits light in a visible region, and employing a photographic material showing a cross-over of 10% or less when it is exposed to radiation in combination with the intensifying screens.
    • 使用卤化银照相材料和射线照相增强屏的组合的放射线图像形成系统通过使用下式的MwOwX:M'(M是Y,La)的稀土荧光体,其放射线照相速度和所得到的辐射图像的清晰度得到改善 ,Gd或Lu; X是硫属原子或卤素原子; M'是激活M的稀土原子;当X是硫族原子时w是2,当X是卤素原子时,w是1) 所述增强屏幕是吸收由所述荧光体发射的发光的一部分然后在可见光区域发光的荧光染料或颜料,并且当组合暴露于辐射时使用显示为10%以下的交叉的照相材料 与强化屏幕。