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    • 1. 发明授权
    • Method and apparatus for non-invasive imaging including quenchable
phosphor-based screens
    • 用于非侵入性成像的方法和装置,包括可淬灭的基于荧光体的屏幕
    • US5514874A
    • 1996-05-07
    • US192770
    • 1994-02-07
    • John M. BooneMelvin Tecotzky
    • John M. BooneMelvin Tecotzky
    • G01T1/20G21K4/00
    • G01T1/20G21K4/00G21K2004/06
    • An invention is described which uses quenchable phosphors to achieve a novel emission response in intensifying screens. The quenchable phosphor has the characteristic of reducing its efficiency of converting incident x-ray, gamma ray, or ionizing particulate radiations into emitted radiation in the ultraviolet (UV), visible or infrared (IR) regions of the electromagnetic spectrum when being essentially simultaneously irradiated by a spectrum of radiation of a specific range in the UV to visible to IR spectrum. The quenchable phosphor is combined with another class of phosphor, which emits the spectrum of radiation when struck by ionizing radiation which is similar or identical to the quenching radiation of the quenchable phosphor. These phosphors can be combined in a variety of geometrical manners, both homogeneously and heterogeneously, to achieve extended dynamic range and spatial frequency filtering for radiographic imaging systems. The invention has equal application for electronic imaging systems such as x-ray image intensifiers. In addition, a system comprising the quenchable phosphors can be built in such a manner as to overcome the optical stage quantum sink limitations in electronic imaging.
    • 描述了使用可淬火磷光体在增强屏幕中实现新型发射响应的发明。 淬火磷光体的特征在于,当基本上同时照射时,将入射的x射线,γ射线或电离微粒辐射转换成电磁光谱的紫外(UV),可见光或红外(IR)区域的发射辐射的效率降低 通过紫外线的特定范围的辐射光谱对红外光谱可见。 可淬灭的磷光体与另一类磷光体组合,当通过与可淬火磷光体的淬灭辐射相似或相同的电离辐射而发射辐射光谱时。 这些荧光体可以以各种几何方式组合,均匀和不均匀,以实现用于放射照相成像系统的扩展的动态范围和空间频率滤波。 本发明对诸如x射线图像增强器的电子成像系统具有相同的应用。 此外,包括可淬火磷光体的系统可以以克服电子成像中的光学级量子阱限制的方式构建。
    • 3. 发明授权
    • Photostimulable phosphors
    • 光致发光荧光粉
    • US5422220A
    • 1995-06-06
    • US243516
    • 1994-05-16
    • Paul LeblansAlbert D. AdriaensensMelvin TecotzkyJan A. Van den Bogaert
    • Paul LeblansAlbert D. AdriaensensMelvin TecotzkyJan A. Van den Bogaert
    • C09K11/00C09K11/61C09K11/77C09K11/85G21K4/00G03C5/16
    • G21K4/00C09K11/7791G21K2004/06Y10S430/146Y10S430/167Y10S430/168
    • A photostimulable phosphor of which the emission intensity at the stimulation wavelength of 550 nm is higher than the emission intensity at the stimulation wavelength of 600 nm, characterized in that said phosphor is a divalent europium activated barium fluorobromide containing as codopant samarium, and wherein the terminology barium fluorobromide stands for an empirical formula wherein (1) a minor part of the barium (less than 50 atom %) is replaced optionally by at least one metal selected from the group consisting of a monovalent alkali metal, a divalent alkaline earth metal other than barium, and a trivalent metal selected from the group consisting of Al, Ga, In, Tl, Sb, Bi, Y, and a rare earth metal selected from the group consisting of Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, (2) a minor part (less than 50 atom %) of the bromine is replaced by chlorine, and/or iodine, and (3) wherein fluorine is present stoichiometrically in a larger atom % than bromine taken alone or bromine combined with chlorine and/or iodine.
    • 激发波长为550nm的发光强度高于600nm的刺激波长下的发光强度的光激发性荧光体,其特征在于,所述荧光体是含有共价掺杂钐的二价铕活化的氟化溴化钡,其特征在于, 氟溴化钡代表经验式,其中(1)少部分钡(小于50原子%)被任选地由至少一种选自以下的金属替代:一价碱金属,除二价碱金属以外的二价碱土金属 钡和选自Al,Ga,In,Tl,Sb,Bi,Y和选自Ce,Pr,Nd,Gd,Tb,Dy,Ho的稀土金属的三价金属 ,Er,Tm,Yb和Lu,(2)溴的少量部分(小于50原子%)被氯和/或碘取代,(3)其中氟以比原子%更大的原子比存在化学计量比 溴或溴 ne与氯和/或碘结合。