【摘要】 以高灵敏度CCD光电系统为图像接收系统,通过构造照相布局,采用两次照相并测量接收平面上总照射量相对值的方法对后防护结构散射在接收平面上的相对空间分布进行了研究,并在此基础上,结合蒙卡模拟技术,研究了几种准直条件下图像中心点处的散/直比,考察了陡坡准直体的降散射效果。更多还原

【Abstract】 By designing radiographic arrangements,the relative distributions of the scatter caused by back shelter in flash X-ray radiography were studied by experiments.A high-sensitive CCD system was used to detect the radiographic images.Then with the help of M.C simulating techniques,the scatter/primary ratios under several collimating conditions were studied with experiments.The functions of graded collimators were investigated.更多还原