摘要:
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.
摘要翻译:描述了使用单脉冲X射线进行双能量射线照相成像的二进制屏幕,系统和方法。 二进制屏幕包括发射第一波长的光的第一荧光体和发射第二波长的光的第二荧光体。 第一和第二荧光体不均匀地分散在二元屏幕中。 第一荧光体优选为Gd 2 O 2 S:Eu + 3,第二荧光体优选为Y 2 O 2 S:Gd + 3。 第二个磷光体也可以是Y2O3:Gd,Y2O2S:Pr或Y2O2S:钕。
摘要:
A method for recording and reproducing an X-ray image comprising the steps of:(1) causing a photostimulable phosphor in a binder layer to absorb image-wise or pattern-wise modulated X-rays,(2) photostimulating said phosphor with stimulating electromagnetic radiation selected from visible light and infrared light to relase from the phosphor in accordance with the absorbed X-rays electromagnetic radiation different in wavelength characteristic from the radiation used in the photo-stimulation, and(3) detecting said light emitted by photostimulation, wherein said phosphor is an alkali earth metal(s) halogermanate or an alkali earth metal(s) halo(silicate-germanate) doped with Eu.sup.2+ and/or Ce.sup.3+ and/or thallium, and optionally co-doped with a rare earth metal ion other than Eu.sup.2+ or Ce.sup.3+ or with Na.sup.+, K.sup.+ or Li.sup.+ or a mixture of at least two of these co-dopants.
摘要:
Rare earth oxysulfide phosphors with excellent optical properties and optimum particle size control for use as photoluminescent, cathodoluminescent and X-ray luminescent phosphors are prepared by treating a solution of at least one salt of a rare earth metal and a salt of a rare earth activator to form solid salts and thereafter heating the oxidic compound with a sulfidizing agent and a silicon sensitizer, preferably in the presence of a fluoride. The rare earth oxysulfide phosphors thus obtained contain from 10 to 1,000 p.p.m. silicon sensitizer and, if used, 20 to 500 p.p.m. fluoride, incorporated in the crystal lattice structure.