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    • 1. 发明授权
    • Films for reproducing digitally stored medical diagnostic images
    • 用于再现数字存储医疗诊断图像的影片
    • US5637447A
    • 1997-06-10
    • US574508
    • 1995-12-19
    • Robert E. DickersonRichard E. BealFranklin C. BrayerStephen A. HersheyPatrick M. Jeffries
    • Robert E. DickersonRichard E. BealFranklin C. BrayerStephen A. HersheyPatrick M. Jeffries
    • G03C1/035G03C1/295G03C1/83G03C5/16G03C1/005
    • G03C5/164G03C1/295G03C1/832G03C5/16G03C1/035G03C2200/58Y10S430/145Y10S430/167
    • A radiation-sensitive film for reproducing digitally stored medical diagnostic images through a series of laterally offset exposures by a controlled radiation source followed byprocessing in 90 seconds or less including development, fixing and drying is disclosed. The film exhibits an average contrast in the range of from 1.5 to 2.0, measured over a density above fog of from 0.25 to 2.0. An emulsion is provided in which silver bromochloride grains provided (a) containing at least 10 mole percent bromide, based on silver, (b) having a mean equivalent circular diameter of less than 0.40 .mu.m, (c) exhibiting an average aspect ratio of less than 1.3, and (d) coated at a silver coverage of less than 40 mg/dm.sup.2. Adsorbed to the surfaces of the silver bromochloride grains is at least one spectral sensitizing dye having an absorption half peak bandwidth in the spectral region of exposure by the controlled exposure source. The film also contains an infrared opacifying dye capable of reducing specular transmission through the film before, during and after processing to less than 50 percent, measured at a wavelength within the spectral region of from 850 to 1100 nm.
    • 公开了一种用于通过受控辐射源的一系列横向偏移曝光再现数字存储的医疗诊断图像的辐射敏感膜,随后在90秒或更短时间内处理,包括显影,定影和干燥。 该薄膜的平均对比度在1.5至2.0的范围内,在雾度以上的密度测量为0.25至2.0。 提供了一种乳液,其中溴溴化银颗粒提供(a)含有至少10摩尔百分比的溴,基于银,(b)平均当量圆直径小于0.40微米,(c)具有平均长宽比 小于1.3,(d)以小于40mg / dm2的银覆盖率涂覆。 吸附到溴氯化银颗粒的表面上的是至少一种光谱增感染料,其在受控曝光源的曝光的光谱区域中具有吸收半峰带宽。 该薄膜还含有一种红外遮光染料,其能够在850至1100nm的光谱区域内的波长下测量,在加工前,加工期间和之后通过薄膜的镜面透射小于50%。
    • 8. 发明授权
    • Blue spectrally sensitized film for radiography, imaging assembly and method
    • 蓝光谱增感胶片用于放射成像,成像组装和方法
    • US06686116B1
    • 2004-02-03
    • US10397435
    • 2003-03-26
    • Robert E. DickersonAnthony AdinStephen A. HersheyRichard F. Davis
    • Robert E. DickersonAnthony AdinStephen A. HersheyRichard F. Davis
    • G03C517
    • G03C5/16G03C1/047G03C1/16G03C1/29G03C1/46G03C5/17G03C5/26G03C2001/0055G03C2001/03511G03C2001/03535G03C2007/3025G03C2200/27G03C2200/52Y10S430/167Y10S430/168
    • 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.
    • 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。
    • 9. 发明授权
    • Portal verification radiographic element and method of imaging
    • 门户验证放射成像元素和成像方法
    • US5952147A
    • 1999-09-14
    • US69528
    • 1998-04-29
    • Robert E. DickersonStephen A. HersheyJames C. Bolthouse
    • Robert E. DickersonStephen A. HersheyJames C. Bolthouse
    • G03C1/035G03C1/08G03C1/36G03C5/16G03C5/17G03C5/26
    • G03C5/16G03C1/035G03C1/08G03C1/36G03C5/17G03C5/26Y10S430/167
    • Portal radiographic elements and a process of confirming the targeting of a beam of X-radiation of from 4 to 25 MVp using the portal radiographic elements are disclosed. The X-radiation is directed at a shield containing a port to create a beam. The beam is directed at a selected anatomical feature of a patient over a period of at least 30 seconds. The portion of the beam that passes through the patient impinges on a metal screen, causing it to emit electrons, and the electrons impinge upon a fluorescent screen, causing it to emit light that exposes a portal verification radiographic element to create a latent image in light-sensitized silver halide grains. A processor is employed to convert the latent image to a viewable silver image from which intended targeting of the X-radiation beam can be verified. The processor relies on attenuation of an infrared beam of a wavelength from 850 to 1100 nm by the radiographic element for activation, and at least one of the hydrophilic colloid layers of the radiographic element contains desensitized silver halide grains to increase the specular density of the radiographic element in the wavelength range of infrared sensors that control the processor.
    • 公开了门静脉造影元件和使用门静脉造影元件确定4至25MVp的X射线束的靶向的过程。 X射线被引导到包含端口的屏蔽件以产生光束。 该束在至少30秒的时间内被引导到患者的选定解剖特征。 穿过患者的束的部分撞击在金属屏幕上,使其发射电子,并且电子撞击在荧光屏上,使其发射暴露入口验证放射线照相元件的光以在光中产生潜像 敏化卤化银颗粒。 使用处理器将潜像转换成可视的银图像,从而可以验证X射线束的预期瞄准。 处理器依赖于用于激活的射线照相元件从850nm到1100nm的波长的红外光束的衰减,并且放射线照相元件的至少一个亲水胶体层含有脱敏的卤化银颗粒以增加放射照相的镜面密度 元件在控制处理器的红外传感器的波长范围内。