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1.发明授权Fluorescent compositions, x-ray intensifying screens, and processes for making same 失效荧光组合物，x射线增强屏幕及其制造方法
公开(公告)号：US4637898A
公开(公告)日：1987-01-20
申请号：US721130
申请日：1985-04-08
摘要： An x-ray intensifying screen comprises a support having thereon a fluorescent composition comprising:(a) from 50 to 90 percent by weight of a substantially isotropic phosphor which is excited by x-rays and substantially transparent to light emitted by said phosphor; and(b) from 10 to 50 percent by weight of a polymer having an index of refraction within 0.02 of the index of refraction of said phosphor over at least 80 percent of the emission spectrum of said phosphor, said support having an index of refraction up to or equal to 0.05 units higher than the index of refraction of said phosphor and having a reflection optical density of at least 1.7 to light emitted by said phosphor.The screen is highly transparent, and further exhibits improved contrast and resolution. A preferred fluorescent composition useful in the x-ray intensifying screen comprises:(a) from 50 to 90 percent by weight of a substantially isotropic phosphor which is excited by x-rays and substantially transparent to light emitted by said phosphor; and(b) from 10 to 50 percent by weight of a polymer having an index of refraction with 0.02 of the index of refraction of said phosphor over at least 80 percent of the emission spectrum of said phosphor, said polymer comprising:(i) from 5 to 99 mole percent of recurring units having the formula: ##STR1## wherein: R.sup.1 is H or alkyl; andR.sup.2 is alkyl, cycloalkyl, aryl, aralkyl or aryl substituted with alkyl, alkoxy or heterocyclic; and(ii) from 1 to 95 mole percent of recurring units having the formula: ##STR2## wherein: Ar is arylene;R.sup.1 is H or alkyl;R.sup.3 is H, alkyl, aryl, or aralkyl; andR.sup.4 is H, alkyl, alkoxy, amino, halogen, sulfide, sulfoxide, sulfonate or heterocyclic.
摘要翻译： X射线增强屏幕包括其上具有荧光组合物的载体，其包含：（a）50至90重量％的基本上各向同性的荧光体，其被x射线激发并对由所述荧光体发射的光基本上透明; 和（b）10至50重量％的聚合物，所述聚合物的折射率在所述荧光体的折射率的0.02以内，超过所述荧光体的发射光谱的至少80％，所述载体具有折射率 高于所述荧光体的折射率的0.05单位，并且对于由所述荧光体发射的光具有至少1.7的反射光密度。 屏幕高透明度，进一步显示对比度和分辨率。 可用于x射线增强屏幕的优选荧光组合物包括：（a）50至90重量％的基本上各向同性的荧光粉，其被x射线激发并对由所述荧光体发射的光基本上透明; 和（b）10至50重量％的聚合物，所述聚合物的所述磷光体的发射光谱的至少80％具有所述磷光体的折射率为0.02的折射率，所述聚合物包含：（i） 5至99摩尔％的具有下式的重复单元：其中：R 1是H或烷基; 并且R 2是被烷基，烷氧基或杂环取代的烷基，环烷基，芳基，芳烷基或芳基; 和（ii）1至95摩尔％的具有下式的重复单元：其中：Ar为亚芳基; R1是H或烷基; R3是H，烷基，芳基或芳烷基; 且R 4为H，烷基，烷氧基，氨基，卤素，硫醚，亚砜，磺酸根或杂环基。
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公开(公告)号：US4733090A
公开(公告)日：1988-03-22
申请号：US891797
申请日：1986-08-01
摘要： A method of storing an image produced by x-ray exposure and releasing the stored image is disclosed. It is disclosed to expose an x-ray storage screen, comprised of an isotropic storage phosphor and a polymer coated on a support, to x-radiation of a first wavelength in an imagewise manner to store an image pattern in the storage screen. The image pattern is retrieved from the storage screen by exposing the storage screen to radiation of a second wavelength, thereby stimulating radiation of a third wavelength. The polymer has an index of refraction which matches the index of refraction of the phosphor at the second wavelength, and the support is non-reflective to radiation of the second wavelength.
摘要翻译： 公开了存储通过X射线曝光产生的图像和释放所存储的图像的方法。 公开了以成像方式将由各向同性的存储磷光体和涂覆在载体上的聚合物组成的x射线存储屏幕以成像方式曝光到第一波长的x射线，以将图像图案存储在存储屏幕中。 通过将存储屏幕暴露于第二波长的辐射，从存储屏幕检索图像图案，从而刺激第三波长的辐射。 聚合物具有与第二波长处的荧光体的折射率匹配的折射率，并且该支持体对第二波长的辐射是不反射的。
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3.发明授权
公开(公告)号：US4032471A
公开(公告)日：1977-06-28
申请号：US657350
申请日：1976-02-11
申请人： George W. Luckey
发明人： George W. Luckey
CPC分类号： C09K11/7769
摘要： Phosphors which have a host matrix of yttrium oxide or a rare earth metal oxide and are activated by one or more rare earth metal activators are prepared by heating a mixture of salts of the host and activator metals (preferably this mixture is formed by co-precipitating the salts of the host and activator metals) at an elevated temperature in an oxygen-containing atmosphere to form the oxide phosphor, and subsequently heating the phosphor at an elevated temperature in a non-oxidizing atmosphere, which is free of halogenating agents, chalcogenating agents, or fluxes. The step of heating in a non-oxidizing atmosphere brings about a substantial increase in the X-ray speed of the phosphor, improves the stability of the phosphor to light, and increases the reflectance of the phosphor in the visible region of the spectrum. Phosphors prepared by use of this process are useful in the manufacture of X-ray intensifying screens.
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公开(公告)号：US4310507A
公开(公告)日：1982-01-12
申请号：US141030
申请日：1980-04-17
申请人： George W. Luckey
发明人： George W. Luckey
IPC分类号： A61K49/04
CPC分类号： A61K49/04
摘要： A lanthanide phosphate provides a contrast agent useful in radiographic contrast compositions and surgical elements. Radiographic imaging methods which employ this contrast agent and methods of making lanthanide phosphate-containing radiographic contrast compositions are also disclosed.
摘要翻译： 磷酸镧提供了可用于放射照相对比组合物和手术元件的造影剂。 还公开了使用该造影剂的放射摄影成像方法和制备含镧系元素的含磷酸盐的射线照相造影剂的方法。
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5.发明授权
公开(公告)号：US4710637A
公开(公告)日：1987-12-01
申请号：US944893
申请日：1986-12-22
CPC分类号： G01T1/1641 , G21K4/00
摘要： A pair of front and back intensifying screens is disclosed capable of providing a sharp imagewise exposure of a dual coated silver halide radiographic element to light when the screens are imagewise exposed to X radiation predominantly of an energy level below 40 keV. The front intensifying screen is comprised of a fluorescent layer having modulation transfer factors greater than those of reference curve A in FIG. 3 and capable of attenuating by 20 to 60 percent a reference X radiation exposure produced by a Mo target tube operated at 28 kVp with a three phase power supply, wherein the reference X radiation exposure passes through 0.03 mm of Mo and 4.5 cm of poly(methyl methacrylate) to reach the fluorescent layer mounted 25 cm from a Mo anode of the target tube and attenuation is measured 50 cm beyond the fluorescent layer. The back intensifying screen has modulation transfer factors greater than those of reference curve B in FIG. 3 and is capable of attenuating by at least 60 percent X radiation received from the front screen when the reference exposure is repeated with both the front and back screens present.
摘要翻译： 公开了一对正面和背面增强屏幕，当屏幕被成像地暴露于主要以40keV以下的能量的X辐射时，能够提供双重涂覆的卤化银放射照相元件的清晰的图像曝光。 前增强屏由具有大于图1中参考曲线A的调制传递系数的荧光层组成。 3，并且能够通过三相电源将由28kVp操作的Mo靶管产生的参考X辐射曝光衰减20％至60％，其中参考X辐射暴露通过0.03mm的Mo和4.5cm的聚（ 甲基丙烯酸甲酯）以达到安装在目标管的Mo阳极25cm处的荧光层，并且测量超过荧光层50cm的衰减。 后增强屏幕具有大于图1中参考曲线B的调制传递因子。 并且当前面和后面屏幕都存在时，当重复参考曝光时，能够衰减从前屏幕接收的至少60％的X射线。
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6.再颁专利Apparatus and method for producing images corresponding to patterns of high energy radiation 失效用于产生对应于高能量辐射图案的图像的装置和方法
公开(公告)号：USRE31847E
公开(公告)日：1985-03-12
申请号：US558394
申请日：1983-12-05
申请人： George W. Luckey
发明人： George W. Luckey
CPC分类号： G03B42/02 , G01T1/2014 , G03C5/16
摘要： The disclosure relates to an apparatus and method for recording images on recording mediums which images correspond to high energy radiation patterns. A temporary storage medium, such as an infrared-stimulable phosphor or thermoluminescent material, is exposed to an incident pattern of high energy radiation. A time interval after exposure, a small area beam of long wave length radiation or heat scans the screen to release the stored energy as light. An appropriate sensor receives the light emitted by the screen and produces electrical energy in accordance with the light received. The information carried by the electrical energy is transformed into a recorded image by scanning an information storage medium with a light beam which is intensity modulated in accordance with the electrical energy. Although the invention can be used at any reproduction ratio, it is particularly usable in recording images representative of large format high energy patterns onto microfilm.
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公开(公告)号：US4311487A
公开(公告)日：1982-01-19
申请号：US158192
申请日：1980-06-11
CPC分类号： G21K4/00 , C09K11/7701 , C09K11/777
摘要： A method for the recrystallization of activated rare-earth oxyhalide phosphors is disclosed. The method comprises recrystallizing the phosphor by firing a phosphor-flux mixture in an inert atmosphere. The phosphor-flux is substantially homogeneous and the flux contains substantially dehydrated magnesium halide. One particularly preferred phosphor made by the method is a lanthanum oxychloride phosphor coactivated with bismuth and ytterbium. This phosphor made by the present method has high speed and low afterglow.
摘要翻译： 公开了一种活化的稀土氧卤化物荧光体的再结晶方法。 该方法包括在惰性气氛中烧制磷光体 - 助熔剂混合物，使磷光体重结晶。 磷光体通量基本上是均匀的，并且焊剂含有基本脱水的卤化镁。 通过该方法制造的一种特别优选的荧光体是与铋和镱共激活的氯氧化镧荧光体。 通过本方法制造的该荧光体具有高速度和低余辉。
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公开(公告)号：US4259588A
公开(公告)日：1981-03-31
申请号：US089785
申请日：1979-10-31
申请人： George W. Luckey , Henry M. Cleare
发明人： George W. Luckey , Henry M. Cleare
摘要： Green-emitting x-ray intensifying screens which produce radiographs with improved visualization of objects having low x-ray contrast are disclosed. These screens contain an absorber which preferentially absorbs blue light, e.g., a yellow dye. A reflective support is used in particularly preferred embodiments.
摘要翻译： 公开了产生具有低X射线对比度的物体的可视化改善的X射线照片的绿色发射x射线增强屏幕。 这些筛网含有优先吸收蓝光的吸收剂，例如黄色染料。 在特别优选的实施例中使用反射支撑件。
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