双能X射线检测技术的能谱滤波参数优化设计

Optimization Design of Filter Parameters for Energy Spectrums Used in Dual energy X ray Inspection

摘要:

提出了使用金属片过滤高能X射线的方法，并采用蒙特卡罗方法模拟双能X射线检测系统，结合建立的代价函数确定最佳滤波金属材料与金属片厚度.利用X射线安检机进行测试，结果表明使用本文提出的金属滤波方法及优化的滤波参数显著提高了X射线双能检测系统的性能，证明了该方法的有效性.

Abstract:

This paper puts forward a method to use metal slice to filter high energy X ray. In order to eliminate the overlap as well as the unbalanced total energy between two energy spectrums as much as possible, this paper develops a dual energy inspection system model based on the Monte Carlo Method and creates a cost function to choose the optimum metal material and thickness. A practical X ray inspection machine is used to test this method. The result indicates that this metal filter method and concerned filter parameters obviously contribute to the performance improvement of dual energy inspection system, which attests to the effectiveness of this method.