Novel correction method for X-ray beam energy fluctuation of high energy DR system with a linear detector  

作　　者：杨民 陈浩 孟凡勇 魏东波 

机构地区：[1]School of Mechanical Engineering and Automation,Beijing Univ.of Aeronautics and Astronautics [2]Institute of Applied Electronics,China Academy of Engineering Physics [3]State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences

出　　处：《Chinese Physics C》2011年第11期1074-1078,共5页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (60872080, 61077011);National State Key Laboratory of Multiphase Complex Systems (MPCS-2011-D-03);Beijing Municipal Commission of Education (BMCE) under the Joint-Building Project

摘　　要：A high energy digital radiography （DR） testing system has generated diverse scientific and technological interest in the field of industrial non-destructive testing. However, due to the limitations of manufac-turing technology for accelerators, an energy fluctuation of the X-ray beam exists and leads to bright and dark streak artifacts in the DR image. Here we report the utilization of a new software-based method to correct the fluctuation artifacts. The correction method is performed using a high pass filtering operation to extract the high frequency information that reflects the X-ray beam energy fluctuation, and then subtracting it from the original image. Our experimental results show that this method is able to rule out the artifacts effectively and is readily implemented on a practical scanning system.A high energy digital radiography （DR） testing system has generated diverse scientific and technological interest in the field of industrial non-destructive testing. However, due to the limitations of manufac-turing technology for accelerators, an energy fluctuation of the X-ray beam exists and leads to bright and dark streak artifacts in the DR image. Here we report the utilization of a new software-based method to correct the fluctuation artifacts. The correction method is performed using a high pass filtering operation to extract the high frequency information that reflects the X-ray beam energy fluctuation, and then subtracting it from the original image. Our experimental results show that this method is able to rule out the artifacts effectively and is readily implemented on a practical scanning system.

关 键 词：X-ray testing ACCELERATOR X–ray beam energy fluctuation high pass filter ARTIFACTS 

分 类 号：O434.19[机械工程—光学工程]