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    Dual-coated radiographic element capable of photothermographic imaging
    2.
    发明授权
    Dual-coated radiographic element capable of photothermographic imaging 失效
    双重放射照相元件能够进行光热成像

    公开(公告)号：US5876905A

    公开(公告)日：1999-03-02

    申请号：US822095

    申请日：1997-03-20

    申请人： Mark E. Irving ,  David H. Levy ,  Lyn M. Eshelman ,  Debra L. Hartsell

    发明人： Mark E. Irving ,  David H. Levy ,  Lyn M. Eshelman ,  Debra L. Hartsell

    IPC分类号： G21K4/00 ,  G03C1/498 ,  G03C5/17 ,  G03C5/16

    CPC分类号： G03C5/17 ,  G03C1/49818 ,  G03C1/0051 ,  G03C2001/03517 ,  G03C2200/01 ,  Y10S430/167 ,  Y10S430/168

    摘要： A dual-coated radiographic element capable of producing a viewable image when heated following imagewise exposure is disclosed comprised of, on opposite sides of a transparent film, layer units containing radiation-sensitive radiation-sensitive silver halide grains, a light-insensitive source of silver, and a reducing agent for said light-insensitive reducible source of silver. Greater than 50 percent of total projected area of said silver halide grains being provided by tabular grains (a) having {100} major faces, (b) containing greater than 70 mole percent chloride, based on silver, (c) exhibiting an average thickness of less than 0.3 .mu.m, and (d) exhibiting an average equivalent circular diameter of greater than 0.6 .mu.m.

    摘要翻译： 公开了一种能够在图像曝光之后加热时产生可视图像的双重涂层放射线照相元件，其在透明膜的相对侧上包括含有辐射敏感的辐射敏感卤化银颗粒的层单元，不透光的银源 ，以及用于所述光不敏感的可还原源的还原剂。 所述卤化银颗粒的总投影面积的大于50％由具有{100}主面的片状颗粒（a）提供，（b）基于银含有大于70摩尔％的氯化物，（c）具有平均厚度 小于0.3μm，（d）平均当量圆直径大于0.6μm。

    Photothermographic composition of enhanced photosensitivity and a process for its preparation
    4.
    发明授权
    Photothermographic composition of enhanced photosensitivity and a process for its preparation 失效
    光热敏成像增强光敏性及其制备方法

    公开(公告)号：US5843632A

    公开(公告)日：1998-12-01

    申请号：US883734

    申请日：1997-06-27

    申请人： Lyn M. Eshelman ,  Mark E. Irving ,  David H. Levy ,  Kathleen R. C. Gisser

    发明人： Lyn M. Eshelman ,  Mark E. Irving ,  David H. Levy ,  Kathleen R. C. Gisser

    IPC分类号： G03C1/498

    CPC分类号： G03C1/49818 ,  G03C1/49845

    摘要： A photothermographic composition of enhanced photosensitivity is disclosed prepared by a process of (a) precipitating light-sensitive silver halide grains in the presence of a non-aqueous polymeric peptizer and (b) then combining the silver halide grains with a non-aqueous polymeric vehicle containing an oxidation-reduction image-forming combination comprised of an organic silver compound and a reducing agent for the organic silver compound. Light-sensitivity of the silver halide grains is enhanced by, prior to step (b), sensitizing the silver halide grains with a 1,1,3,3-tetra-substituted thiourea or selenourea having an acid dissociation constant of less than 7.0, the thiourea or selenourea being dissolved in an aqueous medium.

    摘要翻译： 公开了通过（a）在非水性聚合物胶溶剂存在下沉淀感光卤化银颗粒的方法制备增强光敏性的光热成像组合物，（b）然后将卤化银颗粒与非水性聚合物载体 含有由有机银化合物和有机银化合物的还原剂构成的氧化还原成像组合。 在步骤（b）之前，通过在具有小于7.0的酸解离常数的1,1,3,3-四取代的硫脲或硒脲对卤化银颗粒进行敏化来提高卤化银颗粒的光敏性， 硫脲或硒脲溶解在水性介质中。

    High speed emulsions exhibiting superior speed-granularity relationships
    5.
    发明授权
    High speed emulsions exhibiting superior speed-granularity relationships 失效
    表现出优异的速度 - 粒度关系的高速乳液

    公开(公告)号：US5612176A

    公开(公告)日：1997-03-18

    申请号：US592251

    申请日：1996-01-26

    申请人： Lyn M. Eshelman ,  David H. Levy ,  Paul J. Madigan

    发明人： Lyn M. Eshelman ,  David H. Levy ,  Paul J. Madigan

    IPC分类号： G03C1/005 ,  G03C1/09 ,  G03C1/29 ,  G03C1/035

    CPC分类号： G03C1/0051 ,  G03C1/09 ,  G03C1/29

    摘要： Spectrally sensitized tabular grain emulsions are disclosed exhibiting increased speeds and speed-granularity relationships superior to those of conventional emulsions of the same average grain sizes. The tabular grains have {111} major faces, contain greater than 70 mole percent bromide and from 0.25 to 10 mole percent iodide, based on silver, exhibit an average aspect ratio of greater than 50 and an average equivalent circular diameter of >10 micrometers, account for greater than 90 percent of total grain projected area, and have latent image forming chemical sensitization sites on their surfaces including epitaxially deposited silver halide protrusions of a face centered cubic rock salt crystal lattice structure forming epitaxial junctions with the tabular grains. The protrusions are restricted to those portions of the tabular grains (a) located nearest peripheral edges of and (b) accounting for less than 50 percent of the {111} major faces of the tabular grains, contain a silver chloride concentration at least 10 mole percent higher than that of the tabular grains, and include a higher iodide concentration than those portions of the tabular grains extending between the {111} major faces and forming epitaxial junctions with the protrusions.

    摘要翻译： 公开了光谱敏化的片状颗粒乳剂，显示出比相同平均粒度的常规乳液的速度和速度 - 粒度关系更好。 片状颗粒具有{111}主面，含有大于70摩尔％的溴化物和0.25至10摩尔％的基于银的碘化物，其平均纵横比大于50，平均当量圆直径> 10微米， 占总颗粒投影面积的90％以上，并且在其表面上具有潜像形成化学致敏位点，包括外延沉积的与片状晶粒外延结构的面心立方岩盐晶格结构的卤化银突起。 突出部分限于位于最近外围边缘的片状颗粒（a）的部分，（b）占片状颗粒的{111}主面的少于50％，含有至少10摩尔的氯化银浓度 并且包括比在{111}主面之间延伸的片状颗粒的部分更高的碘化物浓度，并且形成与突起物的外延结。

    (111) tabular grain emulsions exhibiting increased speed
    6.
    发明授权
    (111) tabular grain emulsions exhibiting increased speed 失效
    （111）片状颗粒乳剂显示出增加的速度

    公开(公告)号：US5612177A

    公开(公告)日：1997-03-18

    申请号：US592827

    申请日：1996-01-26

    申请人： David H. Levy ,  Lyn M. Eshelman ,  Paul D. Zimmerman

    发明人： David H. Levy ,  Lyn M. Eshelman ,  Paul D. Zimmerman

    IPC分类号： G03C1/035 ,  G03C1/005

    CPC分类号： G03C1/0051

    摘要： A radiation-sensitive high bromide {111} tabular grain emulsion is disclosed in which at least 90 percent of silver halide epitaxy of an isomorphic face centered cubic crystal lattice structure containing at least 1 mole percent iodide is deposited on the {111} major faces in the form of monocrystalline terraces. Each epitaxial terrace is grown from a nucleation site along an edge of a {111} major face inwardly, with terraces overlying less than 25 percent of the {111} major faces. Surprisingly, these emulsions exhibit higher photographic speeds than those produced by growing silver halide epitaxy outwardly as protrusions from the corners or edges of the tabular grains.

    摘要翻译： 公开了辐射敏感的高溴酸盐{111}片状颗粒乳剂，其中至少90％的含有至少1摩尔百分比碘化物的同构面心立方晶格结构的卤化银外延沉积在{111}主面上 单晶梯田的形式。 每个外延平台从沿着{111}主面的边缘的成核位置向内生长，梯田覆盖不到{111}主面的不到25％。 令人惊讶的是，这些乳液表现出比通过生长卤化银外延产生的那些更高的照相速度，作为从片状颗粒的角部或边缘的突起。

    High speed emulsions exhibiting superior contrast and speed-granularity relationships
    7.
    发明授权
    High speed emulsions exhibiting superior contrast and speed-granularity relationships 失效
    显示出优异的对比度和速度 - 粒度关系的高速乳液

    公开(公告)号：US5614359A

    公开(公告)日：1997-03-25

    申请号：US592798

    申请日：1996-01-26

    申请人： Lyn M. Eshelman ,  David H. Levy ,  Paul J. Madigan

    发明人： Lyn M. Eshelman ,  David H. Levy ,  Paul J. Madigan

    IPC分类号： G03C1/005 ,  G03C1/035

    CPC分类号： G03C1/0051

    摘要： Spectrally sensitized tabular grain emulsions are disclosed exhibiting (1) increased speeds and (2) contrasts and speed-granularity relationships superior to those of conventional emulsions of the same average grain sizes. The tabular grains have {111} major faces, contain greater than 80 mole percent bromide, based on silver, and are substantially free of iodide, exhibit an average aspect ratio of greater than 50 and an average equivalent circular diameter of >10 micrometers, account for greater than 90 percent of total grain projected area, and have latent image forming chemical sensitization sites on their surfaces including epitaxially deposited silver halide protrusions of a face centered cubic rock salt crystal lattice structure forming epitaxial junctions with the tabular grains. The protrusions are restricted to those portions of the tabular grains (a) located nearest peripheral edges of and (b) accounting for less than 50 percent of the {111} major faces of the tabular grains. The protrusions contain silver iodide and a silver chloride concentration at least 10 mole percent higher than that of the tabular grains.

    摘要翻译： 公开了光谱敏化的片状颗粒乳剂，其显示出（1）增加的速度和（2）对比度和速度 - 粒度关系优于相同平均粒度的常规乳液。 片状颗粒具有{111}主面，基于银含有大于80摩尔％的溴化物，并且基本上不含碘化物，具有大于50的平均长径比和> 10微米的平均当量圆直径， 占总颗粒投影面积的90％以上，并且在其表面上具有潜像形成化学增感位点，包括外表面沉积的与片状颗粒形成外延结的立方岩盐晶格结构的卤化银突起。 突出部分限于位于最近外围边缘的片状颗粒（a）的那些部分，（b）占片状颗粒的{111}主面的少于50％。 这些突起包含碘化银和氯化银浓度比片状颗粒高至少10摩尔％。