MICROCHANNEL PLATE ANTISCATTER GRID FOR RADIOGRAPHY

阿拉米达应用科学公司与加州大学戴维斯分校合作 医学中心、劳伦斯利弗莫尔国家实验室和肖特光纤 光学方面，提出发展大画幅、聚焦、二维、 微通道板防散射格栅作为 目前用于射线照相术的线性防散射滤线栅。 在第一阶段， 申请人将开发18x24cm的网格，集中在60cm，兼容 乳房X光检查 蒙特卡罗模拟将有助于设计。 板凳 X射线源、幻影和屏幕胶片探测器的测试将 验证原型网格。 将构建18x24cm网格 作为较小微通道板的平铺阵列， 最近由Schott开发的技术。 大幅面平铺阵列 将集中在：通过安排多个平板在一个温和的 弯曲以符合球形表面;或者通过热塌陷 大阵列到所需的表面。 在第二阶段，20 "x14"网格集中 将开发1.83 m处的14 "x17"网格，用于工作台 一般临床检查和胸部X光检查。 商业化 在第三阶段将出现上级防散射滤线栅。 这些新 防散射滤线栅可显著改善屏片X线摄影， 也将在数字X射线摄影中发挥作用。

Alameda Applied Sciences Corporation in conjunction with UC Davis Medical Center, Lawrence Livermore National Laboratory and Schott Fiber Optics, proposes to develop large format, focused, two-dimensional, microchannel plate anti-scatter grids as commercial replacements for today's linear anti-scatter grids used in radiography. In Phase I, the applicants will develop 18x24cm grids focused at 60cm, compatible with mammography. Monte Carlo simulations will aid the designs. Bench tests with x-ray sources, phantoms and screen-film detectors will validate the prototype grids. The 18x24cm grids will be constructed as tiled arrays of smaller microchannel plates, using a press-fusing technique recently developed by Schott. The large format tiled array will be focused either: by arranging multiple flat plates on a gentle curve to conform to the spherical surface; or by thermally slumping the large array to the desired surface. In Phase II, 20"x14" grids focused at 1m and 14 "x17" grids focused at 1.83m will be developed, for bench and clinical tests in general and chest radiography. Commercialization of the superior anti-scatter grids will occur in Phase III. These new anti-scatter grids could markedly improve screen-film radiography and will also play a role in digital radiography.