-
公开(公告)号：US6042986A
公开(公告)日：2000-03-28
申请号：US69390
申请日：1998-04-29
CPC分类号： G03C5/17 , G03C5/16 , Y10S430/145 , Y10S430/167
摘要： Portal localization 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 subject containing features that are identifiable by differing levels of X-radiation absorption. After a first X-radiation exposure a shield containing a portal is placed between the subject and the source of X-radiation. X-radiation is directed at the subject through the portal. In each instance the X-radiation leaving the subject impinges on a metal screen, causing it to emit electrons, and the electrons impinge upon a fluorescent screen, causing it to emit light, creating during the first and second exposures first and second superimposed latent images in the radiographic element. A processor is employed to convert the latent images to viewable silver images from which intended targeting of the X-radiation passing through the portal in relation to the identifiable features of the subject is realized. 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 particles having an index of refraction in the wavelength range of from 850 to 1100 nm that differs from that of the hydrophilic colloid by at least 0.2 to create a specular density capable of attenuating the infrared beam and activating the processor.
摘要翻译： 公开了门静脉定位放射照相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射线指向包含可通过不同水平的X射线吸收鉴定的特征的受试者。 在第一次X辐射暴露之后，包含门静脉的屏蔽物放置在受试者和X辐射源之间。 X辐射通过门户指向对象。 在每种情况下，离开物体的X射线撞击在金属屏幕上，使其发射电子，并且电子撞击在荧光屏上，使其发光，在第一次和第二次曝光期间产生第一和第二叠加潜像 在射线照相元件。 使用处理器将潜像转换成可见的银图像，从而实现与被摄体的可识别特征相关的通过门户的X射线的目标瞄准。 处理器依赖于用于激活的放射线照相元件从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具有波长范围内的折射率的粒子 850至1100nm，其不同于亲水胶体的至少0.2以产生能够衰减红外光束并激活处理器的镜面密度。
-
公开(公告)号：US5773206A
公开(公告)日：1998-06-30
申请号：US840517
申请日：1997-04-21
IPC分类号： G03C1/00 , G03C1/035 , G03C1/74 , G03C1/76 , G03C1/825 , G03C1/91 , G03C5/02 , G03C5/16 , G03C5/26
CPC分类号： G03C1/8255 , G03C5/164 , G03C1/035 , G03C5/02 , G03C5/26 , Y10S430/145 , Y10S430/164 , Y10S430/167
摘要： An element capable of forming a silver image is disclosed containing insufficient radiation-sensitive silver halide grains to render the element detectable by an infrared sensor. The element has been modified to increase infrared specular density by the inclusion of, in a hydrophilic colloid dispersing medium, particles (a) being removable from the element during a rapid access processing cycle, (b) having a mean size of from 0.3 to 1.1 .mu.m and at least 0.1 .mu.m larger than the mean grain size of the radiation-sensitive grains, and (c) having an index of refraction at the wavelength of the infrared radiation that differs from the index of refraction of the hydrophilic colloid by at least 0.2.
摘要翻译： 公开了能够形成银图像的元件，其包含不足的辐射敏感卤化银颗粒，以使该元件可被红外传感器检测。 通过在亲水胶体分散介质中包含在快速进入处理循环期间从元件中除去的颗粒（a），（b）具有0.3至1.1的平均尺寸，该元件已被修饰以增加红外镜面密度 并且比辐射敏感颗粒的平均粒度大至少0.1μm，以及（c）在红外辐射的波长处具有与亲水胶体的折射率不同的折射率， 至少0.2。
-
公开(公告)号：US5952147A
公开(公告)日：1999-09-14
申请号：US69528
申请日：1998-04-29
摘要： 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.
摘要翻译： 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。
-
4.发明授权Infrared sensor detectable radiographic elements containing very thin tabular grain emulsions 失效红外传感器可检测的含有非常薄的片状颗粒乳剂的放射照相元件
公开(公告)号：US5876909A
公开(公告)日：1999-03-02
申请号：US934177
申请日：1997-09-19
IPC分类号： G03C5/26 , G03C1/00 , G03C1/005 , G03C1/035 , G03C1/74 , G03C1/825 , G03C5/16 , G03C5/38 , G03C1/76
CPC分类号： G03C5/164 , G03C1/8255 , G03C1/0051 , G03C5/16 , Y10S430/145 , Y10S430/164 , Y10S430/167
摘要： The problem of sensing the presence of radiographic elements using infrared sensors that occurs when a radiographic element contains one or more very thin tabular grain emulsions a total silver coating coverage of less than 30 mg/dm.sup.2 is addressed by placing particles in one or more non-emulsion hydrophilic colloid layers. The particles are removable during rapid access processing, have a mean equivalent circular diameter of from 0.3 to 1.1 .mu.m, and have an index of refraction at the wavelength of the infrared radiation that differs from the index of refraction of the hydrophilic colloid by at least 0.2.
摘要翻译： 当放射线照相元件含有一个或多个非常薄的片状颗粒乳剂时，使用红外传感器感测放射线照相元件的存在的问题，总涂层覆盖率小于30mg / dm 2，通过将颗粒放置在一个或多个非织造布 乳液亲水胶体层。 颗粒在快速进入处理过程中是可去除的，具有0.3至1.1μm的平均当量圆直径，并且在红外辐射的波长处的折射率与亲水胶体的折射率至少不同 0.2。
-
-
-
搜索结果
4 条记录 (耗时 0.017 秒)