利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

112 条记录 (耗时 0.025 秒)

    Radiographic screen/film assemblies with improved detection quantum efficiencies
    21.
    发明授权
    Radiographic screen/film assemblies with improved detection quantum efficiencies 失效
    具有改进检测量子效率的射线照相屏幕/胶片组件

    公开(公告)号：US5021327A

    公开(公告)日：1991-06-04

    申请号：US456889

    申请日：1989-12-26

    申请人： Phillip C. Bunch ,  Robert E. Dickerson

    发明人： Phillip C. Bunch ,  Robert E. Dickerson

    IPC分类号： G03C5/17

    CPC分类号： G03C5/17 ,  Y10S430/167

    摘要： Assemblies of double coated radiographic elements exhibiting sharply curtailed crossover and front and back intensifying screen pairs are disclosed. By choosing a front screen that exceeds a stated sharpness criterion, expressed in terms of modulation transfer factors (MTF), and a back screen and adjacent emulsion layer unit combination exhibiting a photicity at least twice that of the combination of the front screen and its adjacent emulsion layer unit an enhancement in detective quantum efficiency (DQE) is realized.

    摘要翻译： 公开了具有急剧缩减的交叉和前后增强屏幕对的双重涂层射线照相元件的组件。 通过选择超过规定的锐度准则的前屏幕，以调制传递因子（MTF）表示，并且背屏幕和相邻的乳剂层单元组合呈现出与前屏幕及其相邻的组合的至少两倍的光泽度 乳化层单位实现了检测量子效率（DQE）的提高。

    Blue spectrally sensitized film for radiography, imaging assembly and method
    25.
    发明授权
    Blue spectrally sensitized film for radiography, imaging assembly and method 失效
    蓝光谱增感胶片用于放射成像，成像组装和方法

    公开(公告)号：US06686116B1

    公开(公告)日：2004-02-03

    申请号：US10397435

    申请日：2003-03-26

    申请人： Robert E. Dickerson ,  Anthony Adin ,  Stephen A. Hershey ,  Richard F. Davis

    发明人： Robert E. Dickerson ,  Anthony Adin ,  Stephen A. Hershey ,  Richard F. Davis

    IPC分类号： G03C517

    CPC分类号： G03C5/16 ,  G03C1/047 ,  G03C1/16 ,  G03C1/29 ,  G03C1/46 ,  G03C5/17 ,  G03C5/26 ,  G03C2001/0055 ,  G03C2001/03511 ,  G03C2001/03535 ,  G03C2007/3025 ,  G03C2200/27 ,  G03C2200/52 ,  Y10S430/167 ,  Y10S430/168

    摘要： A blue-sensitive radiographic silver halide film comprises a silver halide emulsion layer comprising predominantly tabular silver halide grains that have an aspect ratio of at least 15, a grain thickness of at least 0.1 &mgr;m, and comprise at least 90 mol % bromide and up to 4 mol % iodide, based on total silver halide. Substantially all of the iodide is present in an internal localized portion of the tabular silver halide grains that excludes the surface of the grains. The tabular silver halide grains are dispersed in a hydrophilic polymeric vehicle mixture comprising at least 0.5% of oxidized gelatin, based on the total dry weight of the polymeric vehicle mixture in the emulsion layer. The tabular silver halide grains are spectrally sensitized using a combination of spectral sensitizing dyes to provide increased speed and reduced dye stain. The dyes have maximum J-aggregate absorptions on the tabular silver halide grains of from about 380 to about 500 nm, wherein the maximum J-aggregate absorption of one spectral sensitizing dye is from about 20 to about 50 nm lower in wavelength than the maximum J-aggregate absorption of the second spectral sensitizing dye.

    摘要翻译： 蓝色感光放射线卤化银膜包括卤化银乳剂层，其主要包含片状卤化银颗粒，其长宽比至少为15，晶粒厚度为至少0.1μm，并且包含至少90mol％的溴化物，直到 4mol％碘化物，基于总卤化银。 基本上所有的碘化物都存在于不排除颗粒表面的片状卤化银颗粒的局部部分内。 片状卤化银颗粒分散在包含至少0.5％氧化明胶的亲水性聚合物载体混合物中，基于乳液层中聚合物载体混合物的总干重。 片状卤化银颗粒使用光谱增感染料的组合进行光谱增感，以提高速度和减少染色剂染色。 这些染料在约380至约500nm的片状卤化银颗粒上具有最大的J-聚集体吸收，其中一种光谱增感染料的最大J-聚集体吸收值比最大J值低约20至约50nm 聚集的第二光谱增感染料的吸收。

    Asymmetric radiographic film for mammography and method of processing
    26.
    发明授权
    Asymmetric radiographic film for mammography and method of processing 失效
    用于乳房X线照相术的不对称放射照相胶片和加工方法

    公开(公告)号：US06680154B1

    公开(公告)日：2004-01-20

    申请号：US10431314

    申请日：2003-05-07

    申请人： Robert E. Dickerson

    发明人： Robert E. Dickerson

    IPC分类号： G03C140

    CPC分类号： G03C5/16 ,  G03C1/0051 ,  G03C1/46 ,  G03C1/832 ,  G03C5/17 ,  G03C5/26 ,  G03C2001/03541 ,  G03C2007/3025 ,  G03C2007/3027 ,  G03C2200/52 ,  Y10S430/167

    摘要： An asymmetric radiographic silver halide film has two cubic grain silver halide emulsion layers on the frontside and a tabular grain silver halide emulsion layer on the backside. The cubic grain silver halide emulsion layer closer to the support also includes a crossover control agent to reduce crossover to the backside to less than 10% and is thinner than the outermost cubic grain silver halide emulsion layer. The backside of the support also includes an antihalation layer. These films are useful for imaging soft tissue as in mammography.

    摘要翻译： 不对称放射线卤化银膜在前侧具有两个立方晶粒卤化银乳剂层，背面具有片状粒状卤化银乳剂层。 更靠近载体的立方晶粒卤化银乳剂层还包括交叉控制剂，以减少到背面的交叉度小于10％并且比最外面的立方晶粒卤化银乳剂层薄。 支撑体的背面还包括防晕层。 这些膜对于乳腺摄影术中的软组织成像是有用的。

    High contrast visually adaptive radiographic film and imaging assembly for thoracic imaging
    28.
    发明授权
    High contrast visually adaptive radiographic film and imaging assembly for thoracic imaging 失效
    用于胸部成像的高对比度视觉自适应放射照相胶片和成像组件

    公开(公告)号：US06387586B1

    公开(公告)日：2002-05-14

    申请号：US09707063

    申请日：2000-11-06

    申请人： Robert E. Dickerson ,  Phillip C. Bunch

    发明人： Robert E. Dickerson ,  Phillip C. Bunch

    IPC分类号： G03C146

    CPC分类号： G03C5/16 ,  G03C1/0051 ,  G03C1/08 ,  G03C2001/094 ,  G03C2200/58

    摘要： High performance, very high contrast radiographic films exhibit visually adaptive contrast when imaged in radiographic imaging assemblies comprising intensifying screens. These films having at least two tabular silver halide emulsions on each side of a film support, and the emulsion closest to the film support on each side includes chemistry to control crossover and a rhodium dopant and has higher photographic speeds than the other emulsions. In addition, the films can be rapidly processed to provide images having a peak gamma >3.1 while maintaining gammas >1.0 out into the toe of a D vs. logE sensitometric curve to a value of −0.9 logE. These films are particularly useful for thoracic imaging.

    摘要翻译： 当在包括增强屏幕的放射照相成像组件中成像时，高性能，非常高对比度的放射照相胶片呈现视觉上的自适应对比度。 这些膜在膜支撑体的每一侧上具有至少两个片状卤化银乳剂，并且最靠近每侧的膜支持体的乳液包括控制交叉和铑掺杂剂的化学物质，并且具有比其它乳液更高的照相速度。 此外，可以快速处理膜以提供具有峰值> 3.1的图像，同时将D与logE感光度曲线的趾部的伽马值> 1.0保持为-0.9logE的值。 这些膜对胸部成像特别有用。

    High contrast visually adaptive radiographic film and imaging assembly
    29.
    发明授权
    High contrast visually adaptive radiographic film and imaging assembly 有权
    高对比度视觉自适应射线照相胶片和成像组件

    公开(公告)号：US06190822B1

    公开(公告)日：2001-02-20

    申请号：US09514871

    申请日：2000-02-28

    申请人： Robert E. Dickerson ,  Phillip C. Bunch

    发明人： Robert E. Dickerson ,  Phillip C. Bunch

    IPC分类号： G03C108

    CPC分类号： G03C5/16 ,  G03C1/46 ,  G03C5/17 ,  G03C2001/0055 ,  G03C2001/03511 ,  G03C2005/168 ,  G03C2200/27 ,  G03C2200/52 ,  G03C2200/58

    摘要： High performance, high contrast radiographic films exhibit visually adaptive contrast when imaged in radiographic imaging assemblies comprising an intensifying screen on both sides. These films having at least two silver halide emulsions on each side of a film support, and the emulsion closest to the film support on each side includes chemistry to control crossover and has higher photographic speeds than the other emulsions. In addition, the films can be rapidly processed to provide the desired image having visually adaptive contrast, i.e. the upper scale contrast is at least 1.7 times the lower scale contrast. Thus, dense objects can be better seen at the higher densities of the radiographic image without any adverse sensitometric changes in the lower scale densities. These films are useful for general purpose, high contrast radiographic imaging.

    摘要翻译： 当在包括两侧的增强屏幕的射线照相成像组件中成像时，高性能，高对比度的放射照相胶片呈现视觉上的自适应对比度。 这些膜在膜支撑体的每一侧具有至少两个卤化银乳剂，并且最靠近每侧的膜支持物的乳液包括控制交叉的化学物质并且具有比其它乳液更高的摄影速度。 此外，可以快速处理胶片以提供具有视觉上自适应对比度的期望图像，即，较高比例对比度至少为下一级对比度的1.7倍。 因此，可以在放射照相图像的较高密度下更好地观察到致密物体，而在较低刻度密度中没有任何不利的感光度变化。 这些胶片可用于通用的高对比度放射照相成像。

    Manually actuated dispensers and kit for roomlight processing of black-and-white photographic elements
    30.
    发明授权
    Manually actuated dispensers and kit for roomlight processing of black-and-white photographic elements 失效
    手动启动的分配器和用于黑白照相元件的室内光处理的套件

    公开(公告)号：US6082909A

    公开(公告)日：2000-07-04

    申请号：US92726

    申请日：1998-06-05

    申请人： Alan S. Fitterman ,  Robert E. Dickerson ,  Peter J. Kelch ,  Ronald J. Perry ,  David G. Sherburne ,  James T. Samuels

    发明人： Alan S. Fitterman ,  Robert E. Dickerson ,  Peter J. Kelch ,  Ronald J. Perry ,  David G. Sherburne ,  James T. Samuels

    IPC分类号： G03C1/005 ,  G03C1/36 ,  G03C1/83 ,  G03C5/16 ,  G03C5/26 ,  G03C5/38 ,  G03D3/06 ,  G03D13/06 ,  C03D3/02

    CPC分类号： G03C1/36 ,  G03C5/26 ,  G03C5/261 ,  G03C5/264 ,  G03C5/383 ,  G03D13/06 ,  G03D3/06 ,  G03C1/0051 ,  G03C1/832 ,  G03C5/16

    摘要： Black-and-white elements, such as radiographic films, can be processed in roomlight because they include certain light absorbing dyes and desensitizers. Processing of such elements can be achieved using a processing kit and a two-stage process carried out in the same light- and fluid-tight processing apparatus. In the first stage, development is initiated with a developing composition having a pH of from about 10 to about 12.5, and comprising an appropriate black-and-white developing agent and a sulfite. After an appropriate time, a non-sulfite fixing agent is introduced into the processing apparatus or container to provide a combined developing/fixing composition, and development and fixing are carried out simultaneously. The processing method is carried out quickly, usually within about 90 seconds. The presence of sulfite and high pH in both stages decolorizes or deactivates the particulate dyes. The processing kit includes the photographic element, a first vessel containing a developing composition, a second vessel containing a fixing composition, and a container for holding an exposed element. The first and second vessels have manually actuated dispensers for dispensing developing composition and fixing composition into the container for processing of the exposed element.

    摘要翻译： 黑白元素，如放射照相胶片，可在室温下进行处理，因为它们包括某些光吸收染料和脱敏剂。 可以使用在相同的光和流体密封处理装置中执行的处理套件和两阶段处理来实现这些元件的处理。 在第一阶段中，开发具有pH为约10至约12.5的显影组合物，并且包含适当的黑白显影剂和亚硫酸盐。 在适当的时间之后，将非亚硫酸盐固定剂引入加工设备或容器中以提供组合的显影/定影组合物，同时进行显影和定影。 处理方法快速进行，通常在约90秒内。 两相中亚硫酸盐和高pH值的存在使颗粒状染料脱色或失活。 处理套件包括照相元件，含有显影组合物的第一容器，含有定影组合物的第二容器和用于保持曝光元件的容器。 第一和第二容器具有手动致动的分配器，用于将显影组合物和固定组合物分配到用于处理暴露元件的容器中。