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Novel x-ray image intensifier with catadioptric electron optics

机译:带有折反射电子光学系统的新型X射线图像增强器

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Abstract: A novel experimental x-ray image intensifier tube with simple catadioptric electron optics is presented and its imaging properties are analyzed theoretically by the use of a few simplified relations. The introduction of catadioptric electron optics in an x-ray image intensifier makes it possible to use a unique output phosphor structure which alleviates the imaging defects suffered by most conventional state-of-the-art x-ray image intensifiers. Several important advantages of the novel intensifier are exemplified. A brief theoretical analysis of the x-ray conversion factor, signal-to-noise ratio, modulation transfer characteristic and other imaging properties of the new tube is given to indicate the improved performance that can be realized by the new intensifier. Preliminary results obtained from an experimental tube with a diameter of 18 mm are presented to verify the theoretical analysis and predict the performance of tubes with larger diameters. The characteristics of the x-ray images of test objects recorded with the experimental tube coupled with a relay lens to a CCD camera and video frame grabber are displayed and analyzed. !0
机译:摘要:提出了一种新型的具有简单折反射电子光学特性的实验X射线图像增强管,并通过使用一些简化的关系从理论上分析了其成像特性。在X射线图像增强器中引入反折射电子光学器件,可以使用独特的输出磷光体结构,从而减轻大多数传统的最新X射线图像增强器遭受的成像缺陷。举例说明了新型增压器的几个重要优点。对新管的X射线转换系数,信噪比,调制传递特性和其他成像特性进行了简要的理论分析,以表明新的增强器可以实现的性能改善。给出了从直径为18 mm的实验管获得的初步结果,以验证理论分析并预测直径较大的管的性能。显示并分析了用结合有中继透镜的实验管和CCD摄像机以及视频帧采集器记录的测试对象的X射线图像的特性。 !0

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