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1. 发明授权

US4857741A X-ray intensifying screen 失效
标题翻译： X光增强屏
公开(公告)号：US4857741A
公开(公告)日：1989-08-15
申请号：US31140
申请日：1987-03-30
申请人： Kazuto Yokota , Akihisa Saito
发明人： Kazuto Yokota , Akihisa Saito
IPC分类号： G03C1/775 , C09K11/00 , C09K11/08 , C09K11/67 , C09K11/68 , C09K11/77 , C09K11/78 , D21H19/00 , D21H27/00 , G21K4/00
CPC分类号： C09K11/7703 , C09K11/7702 , C09K11/7768 , C09K11/7769 , C09K11/7785 , G21K4/00
摘要： This invention concerns an intensifying screen using a phosphor capable of emitting light under X-ray excitation. This intensifying screen is characterized by the fact that the phosphor layer in the intensifying screen comprises a first phosphor layer containing a phosphor represented by the general formula (I):M.sub.a Ln.sub.1--x--(2/3)a DO.sub.4 :XR.sup.3+ (I)(wherein M stands for at least one divalent metal element selected from the group consisting of Be, Mg, Ca, Sr, Ba, Zn, and Cd, Ln for at least one element selected from the group consisting of Y, Gd, La, and Lu, D for either or both of Ta and Nb, R for at least one member selected from the group consisting of Tm, Pr, Sm, Eu, Tb, Dy, Yb, and self-activators, a for a value satisfying the expression, 0
摘要翻译：本发明涉及使用能够在X射线激发下发光的荧光体的增强屏幕。该增强屏的特征在于，增强屏中的荧光体层包括含有通式（I）表示的荧光体的第一荧光体层：MaLn1-x-（2/3）aDO4：XR3 +（I）（其中， M代表选自Be，Mg，Ca，Sr，Ba，Zn和Cd中的至少一种二价金属元素，对于选自Y，Gd，La和Lu中的至少一种元素，对于Ta和Nb中的任一个或两个，对于选自Tm，Pr，Sm，Eu，Tb，Dy，Yb和自激活剂中的至少一个，R为R，对于满足表达式的值，并且形成在上述基板侧上，并且形成在上述保护层侧上的含有CaWO 4的第二荧光体层，其中，满足0≤x≤0.005的阀为0

2. 发明授权

US5302817A X-ray detector and X-ray examination system utilizing fluorescent material 失效
标题翻译： X射线检测器和使用荧光材料的X射线检查系统
公开(公告)号：US5302817A
公开(公告)日：1994-04-12
申请号：US901476
申请日：1992-06-19
申请人： Kazuto Yokota , Akihisa Saito , Noriaki Yagi
发明人： Kazuto Yokota , Akihisa Saito , Noriaki Yagi
IPC分类号： C09K11/77 , G01V5/00 , G21K4/00 , H01J40/14
CPC分类号： G01V5/0016 , C09K11/7733 , C09K11/7771 , C09K11/7791 , G01V5/0025 , G21K4/00 , G21K2004/06
摘要： An X-ray detector has a transmission type intensifying screen provided on the X-ray incident area of the detector body and a reflection type intensifying screen provided on the inner wall surface of the detector body except for the X-ray incident area. Visible rays from the transmission type intensifying screen and the reflection type intensifying screen are detected by a photomultiplier installed in the detector body. The transmission type intensifying screen and the reflection type intensifying screen use fluorescent materials such as Gd.sub.2 O.sub.2 S:Tb; Gd.sub.2 O.sub.2 S:Tb, Ce; GD.sub.2 O.sub.2 S:Tb, Yb; Gb.sub.2 O.sub.2 S:Pr; BaFCl:Eu; BaFBr:Eu; La.sub.2 O.sub.2 S:Tb; La.sub.2 O.sub.2 S:Tb, Ce; La.sub.2 O.sub.2 S:Tb, Yb; La.sub.2 O.sub.2 S:Pr; Y.sub.2 O.sub.2 S:Tb; Y.sub.2 O.sub.2 S:Tb, Ce; Y.sub.2 O.sub.2 S:Tb, Yb; and Y.sub.2 O.sub.2 S:Pr.
摘要翻译： X射线检测器具有设置在检测器主体的X射线入射区域上的透射型增强屏幕和设置在除了X射线入射区域之外的检测器主体的内壁表面上的反射型增强屏幕。通过安装在检测器主体中的光电倍增管检测来自透射型增强屏和反射型增强屏的可见光。透射型增强屏和反射型增强屏使用诸如Gd 2 O 2 S：Tb的荧光材料; Gd2O2S：Tb，Ce; GD2O2S：Tb，Yb; Gb2O2S：Pr; BaFCl：Eu; BaFBr：Eu La2O2S：Tb; La2O2S：Tb，Ce; La2O2S：Tb，Yb; La2O2S：Pr; Y2O2S：Tb; Y2O2S：Tb，Ce; Y2O2S：Tb，Yb; 和Y2O2S：Pr。

3. 发明授权

US4472635A Radiographic intensifying screen 失效
标题翻译：射线增强屏
公开(公告)号：US4472635A
公开(公告)日：1984-09-18
申请号：US426135
申请日：1982-09-28
申请人： Kazuto Yokota , Mitsuo Nakamura
发明人： Kazuto Yokota , Mitsuo Nakamura
IPC分类号： G03C5/17 , G21K4/00 , G01J1/58
CPC分类号： G21K4/00
摘要： A radiographic intensifying screen having improved modulation transfer function and/or sensitivity. The radiographic intensifying screen of the present invention comprises a support, a phosphor layer formed on the support, a protective film formed on the phosphor layer, wherein the phosphor layer includes a small phosphor particles layer at its support side consisting essentially of small phosphor particles with an average grain size of about 4 .mu.m or less and a binding agent; and a mixed large and small phosphor particles layer at its protective film side consisting essentially of large phosphor particles with an average grain size ranging from about 7 to 20 .mu.m, small phosphor particles present in the interstices of the large phosphor particles and with an average grain size of about 4 .mu.m or less and a binding agent.
摘要翻译：一种具有改进的调制传递函数和/或灵敏度的射线照相增强屏。本发明的射线照相增强屏幕包括支撑体，形成在支撑体上的荧光体层，形成在荧光体层上的保护膜，其中荧光体层在其支撑侧包括小的荧光体颗粒层，其基本上由具有平均粒径约4μm以下，粘合剂; 并且在其保护膜侧的混合的大的和小的荧光体颗粒层基本上由平均粒度为约7至20μm的大的荧光体颗粒组成，小的荧光体颗粒存在于大的荧光体颗粒的空隙中并且具有平均约4μm以下的粒径和粘合剂。

4. 发明授权

US5558815A Single crystal of compound, laser rod, laser oscillator, scintillator, CT scanner, color display and process for preparing the same 失效
标题翻译：复合单晶，激光棒，激光振荡器，闪烁体，CT扫描仪，彩色显示及其制备方法
公开(公告)号：US5558815A
公开(公告)日：1996-09-24
申请号：US339260
申请日：1994-11-10
申请人： Kazuto Yokota
发明人： Kazuto Yokota
IPC分类号： C30B11/00 , C30B13/00 , C09K11/56 , C09K11/69
CPC分类号： C30B13/00 , C30B11/00 , C30B29/30 , C30B29/46
摘要： A single crystal of a compound comprises a single crystal of a compound at least part of components is of the above mentioned material decomposed at a temperature around the melting point, having a volume of 5 cc or more, and deviation of respective elements in a composition of the single crystal from the stoichiometric composition is within the range of .+-.5%. Also, a process for preparing a single crystal of a compound comprises the steps of deaerating and sealing powder of a starting material for the single crystal in a sealable capsule, sintering the powder by subjecting to heat treatment (HIP treatment) at a temperature 1/2 or higher of the melting point in terms of the absolute temperature while applying high pressure to a sealed material of the powder, deaerating and sealing the sintered body in a sealable capsule made of a similar high melting point substance and having an inner shape corresponding to the shape of the sintered body, and preparing a single crystal by subjecting a sealed material of the sintered body to heat treatment at a temperature of the melting point of the starting material of the single crystal under pressure. As the single crystal of a compound, high quality single crystals with a large size such as RE.sub.2 O.sub.2 S or REVO.sub.4 (RE is a rare earth element) can be obtained.
摘要翻译：化合物的单晶包含化合物的单晶，至少部分组分是上述物质在熔点附近分解的体积分数为5cc或更多，以及组分中各元素的偏差的化学计量组成的单晶在±5％的范围内。此外，制备化合物的单晶的方法包括以下步骤：在可密封胶囊中将用于单晶的起始材料的粉末脱气和密封，通过在+ E温度下进行热处理（HIP处理）来烧结粉末，在绝缘温度方面为1/2 + EE或更高的熔点，同时向粉末的密封材料施加高压，将烧结体脱气并密封在由类似的高熔点物质制成的可密封的胶囊中，以及具有与烧结体的形状对应的内部形状，并且通过在烧结体的密封材料的压力下在单晶的起始材料的熔点的温度下进行热处理来制备单晶。作为化合物的单晶，可以得到RE2O2S或REVO4（RE为稀土元素）等大尺寸的高品质单晶。

5. 发明授权

US5640016A Rare-earth oxysulfide scintillators and X-ray detectors using rare-earth oxysulfide scintillators 失效
标题翻译：稀土氧硫化物闪烁体和使用稀土氧硫化物闪烁体的X射线探测器
公开(公告)号：US5640016A
公开(公告)日：1997-06-17
申请号：US594387
申请日：1996-01-31
申请人： Naotoshi Matsuda , Masaaki Tamatani , Miwa Okumura , Kazuto Yokota
发明人： Naotoshi Matsuda , Masaaki Tamatani , Miwa Okumura , Kazuto Yokota
IPC分类号： C09K11/00 , C09K11/77 , C09K11/84 , G01T1/20 , G01T1/202 , G21K4/00
CPC分类号： G01T1/20 , C04B35/547 , C04B35/6455 , C09K11/7771 , G21K4/00 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/656 , C04B2235/6562 , C04B2235/6565 , C04B2235/6567 , C04B2235/6584 , C04B2235/72 , G21K2004/06
摘要： A scintillator is disclosed that comprises a ceramic of a rare-earth oxysulfide activated with Pr, such as Gd.sub.2 O.sub.2 S:Pr, having: (1) a ratio of a peak value at about 270 K to that at about 140 K in a glow curve of about 0.01 or less, when the thermoluminescence intensity of the scintillator is measured at a rate of temperature increase of 15.+-.5 K/min after 20 minutes irradiation with ultraviolet rays having a wavelength of 254 nm and a power of 1 W/m.sup.2 at liquid nitrogen temperature, and (2) a ratio of a peak value at about 630 nm to that at about 512 nm of a thermoluminescence of about 410 K with about 2 nm resolution of about 1 or less.
摘要翻译：公开了一种闪烁体，其包含用Pr活化的稀土氧硫化物的陶瓷，例如Gd 2 O 2 S：Pr，其具有：（1）在约270K的峰值与约140K的峰值的比率在约为0.01以下，当用波长254nm，功率1W / m 2的紫外线照射20分钟后，以15±5K / min的升温速度测定闪烁体的热发光强度在液氮温度下，和（2）大约630nm的峰值与约512nm的峰值在大约410K的热释光下的约2nm分辨率约为1或更小。

6. 发明授权

US5609793A Fluorescent substance, method for production thereof, radiation detector using the fluorescent substance, and X-ray CT apparatus using the radiation detector 失效
标题翻译：荧光物质，其生产方法，使用荧光物质的放射线检测器和使用该辐射检测器的X射线CT装置
公开(公告)号：US5609793A
公开(公告)日：1997-03-11
申请号：US362004
申请日：1994-12-22
申请人： Kazuto Yokota , Yukihiro Fukuta
发明人： Kazuto Yokota , Yukihiro Fukuta
IPC分类号： G01T1/202 , C09K11/08 , C09K11/77 , C09K11/84 , G21K4/00 , C09K11/00
CPC分类号： C09K11/7771 , C04B35/547 , C04B35/62625 , G21K4/00 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/442 , C04B2235/447 , C04B2235/727 , G21K2004/06
摘要： A fluorescent substance is comprised of a rare earth oxysulfide represented by the chemical formula, R.sub.2(1-x) Pr.sub.2x O.sub.2 S, wherein R stands for at least one member selected from the group consisting of Y, Gd, La, and Lu and x for a numerical value satisfying the expression, 5.times.10.sup.-5 .ltoreq.x.ltoreq.1.times.10.sup.-2, and has a linear absorption coefficient of not more than 6.0 cm.sup.-1 at 550 nm. And further fluorescent substance contains PO.sub.4 in an amount of not more than 100 ppm.
摘要翻译：荧光物质由化学式R2（1-x）Pr2xO2S表示的稀土氧硫化物构成，其中R代表选自Y，Gd，La和Lu中的至少一种，x代表满足表达式的数值为5×10-5×x1 / 10-2-2，并且在550nm具有不大于6.0cm -1的线性吸收系数。另外荧光体含有不大于100ppm的PO4。

7. 发明授权

US5386797A Single crystal of compound, laser rod, laser oscillator, scintillator, CT scanner, color display and process for preparing the same 失效
标题翻译：复合单晶，激光棒，激光振荡器，闪烁体，CT扫描仪，彩色显示及其制备方法
公开(公告)号：US5386797A
公开(公告)日：1995-02-07
申请号：US37109
申请日：1993-03-26
申请人： Kazuto Yokota
发明人： Kazuto Yokota
IPC分类号： C30B11/00 , C30B13/00 , C30B13/16
CPC分类号： C30B13/00 , C30B11/00 , C30B29/30 , C30B29/46
摘要： A single crystal of a compound comprises which easily decomposes at a temperature around the melting point and evaporates at least a part of the compound having a volume of 5 cc or more and a composition deviation of respective elements from the stoichiometric composition of the compound being within the range of .+-.5% in terms of weight ratio. Also, a process for preparing a single crystal of a compound comprises the steps of deaerating and sealing powder of a starting material for the single crystal in a sealable capsule, sintering the powder by subjecting to heat treatment (HIP treatment) at a temperature 1/2 or higher of the melting point in terms of the absolute temperature while applying high pressure to a sealed material of the powder, deaerating and sealing the sintered body in a sealable capsule made of a similar high melting point substance and having an inner shape corresponding to the shape of the sintered body, and preparing a single crystal by subjecting a sealed material of the sintered body to heat treatment at a temperature of the melting point of the starting material of the single crystal under pressure. As the single crystal of a compound, high quality single crystals with a large size such as RE.sub.2 O.sub.2 S or REVO.sub.4 (RE is a rare earth element) can be obtained.
摘要翻译：化合物的单晶包含在熔点附近的温度下容易分解并蒸发出体积为5cc以上的化合物的至少一部分，以及各元素与化合物的化学计量组成的组成偏差在其内以重量比计+/- 5％的范围。此外，制备化合物的单晶的方法包括以下步骤：在可密封胶囊中将用于单晶的起始材料的粉末脱气和密封，通过在温度1 /℃下进行热处理（HIP处理）来烧结粉末，将绝缘温度以熔点计为2以上，同时向粉末的密封材料施加高压，将烧结体脱气并密封在由类似高熔点物质制成的可密封胶囊中，并具有对应于烧结体的形状，并且通过在烧结体的密封材料的压力下在单晶的起始材料的熔点的温度下进行热处理来制备单晶。作为化合物的单晶，可以得到RE2O2S或REVO4（RE为稀土元素）等大尺寸的高品质单晶。

8. 发明授权

US4054798A X-ray conversion screens 失效
标题翻译： X射线转换屏
公开(公告)号：US4054798A
公开(公告)日：1977-10-18
申请号：US741109
申请日：1976-11-11
申请人： Minoru Watanabe , Ryoichi Kubo , Toshio Nishimura , Kazuto Yokota
发明人： Minoru Watanabe , Ryoichi Kubo , Toshio Nishimura , Kazuto Yokota
IPC分类号： C09K11/08 , C09K11/77 , C09K11/86 , G03C1/815 , G21K4/00 , G01J1/58
CPC分类号： C09K11/777 , G21K4/00
摘要： An X-ray conversion screen having reduced afterglow without any appreciable loss in the brightness under X-ray excitation comprises a substrate and at least one fluorescent layer applied thereto, the fluorescent layer containing a fluorescent substance which comprises terbium-activated lanthanum or gadolinium oxyhalide having yttrium or lutetium and, as desired, ytterbium added thereto as impurities.
摘要翻译：具有降低的余辉而在X射线激发下的亮度没有任何明显损失的X射线转换屏幕包括基底和施加到其上的至少一个荧光层，荧光层含有荧光物质，其包含铽激活的镧或钆氧卤化物，其具有钇或镥，根据需要，作为杂质添加镱。

9. 发明授权

US4863882A Rare earth oxysulfide ceramics 失效
标题翻译：稀土氧硫化物陶瓷
公开(公告)号：US4863882A
公开(公告)日：1989-09-05
申请号：US168238
申请日：1988-03-15
申请人： Naotoshi Matsuda , Masaaki Tamatani , Kazuto Yokota
发明人： Naotoshi Matsuda , Masaaki Tamatani , Kazuto Yokota
IPC分类号： B22F3/12 , C04B35/547 , C04B35/645
CPC分类号： C04B35/6455 , B22F3/1241 , C04B35/547
摘要： Rare earth oxysulfide ceramic material prepared by covering the material with a foil of a metal selected from the group consisting of molybdenum, tungsten, platinum, and rhenium, sealing it into an airtight vessel of tantalum or niobium, and then subjecting it to a hot isostatic press process.
摘要翻译：通过用选自钼，钨，铂和铼的金属箔覆盖材料制备的稀土氧硫化物陶瓷材料，将其密封成钽或铌的气密容器，然后使其经受热等静压新闻流程。

10. 发明授权

US4752424A Method of manufacturing a rare earth oxysulfide ceramic 失效
标题翻译：稀土氧硫化物陶瓷的制造方法
公开(公告)号：US4752424A
公开(公告)日：1988-06-21
申请号：US4574
申请日：1987-01-20
申请人： Naotoshi Matsuda , Masaaki Tamatani , Kazuto Yokota
发明人： Naotoshi Matsuda , Masaaki Tamatani , Kazuto Yokota
IPC分类号： B22F3/12 , C04B35/547 , C04B35/645 , B29D11/00 , B29C43/00 , C01B17/45 , C04B35/00
CPC分类号： C04B35/6455 , B22F3/1241 , C04B35/547
摘要： There is provided a method of manufacturing a ceramic, wherein a ceramic material is covered with a foil of a metal selected from the group consisting of molybdenum, tungsten, platinum, and rhenium, sealed into an airtight vessel of tantalum or niobium, and then subjected to a hot isostatic press process. The method of the present invention can suppress coloration produced in the hot isostatic press.
摘要翻译：提供了一种制造陶瓷的方法，其中陶瓷材料被选自钼，钨，铂和铼的金属箔覆盖，密封在钽或铌的气密容器中，然后进行到热等静压机。本发明的方法可以抑制在热等静压机中产生的着色。

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