高密度金属引起的双能CT成像精度下降机理及校正技术研究

项目名称： 高密度金属引起的双能CT成像精度下降机理及校正技术研究

项目编号： No.U1533124

项目类型： 联合基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 李保磊

作者单位： 公安部第一研究所

项目金额： 23万元

中文摘要： X射线双能CT成像技术在民航安全检查领域有着广泛的应用并发挥着越来越重要的作用。检测包裹中高密度金属的存在会降低双能CT的成像精度，这影响了CT安检设备在民航安检中的实际应用效果。为克服该技术难题，本项目拟从双能CT成像的物理原理出发，通过蒙特卡洛仿真和解析仿真相结合的手段，研究高密度金属引起的成像精度下降的定性和定量规律。并通过双能CT成像物理模型分析，设计提高成像精度的技术与校正方法。进而为抑制高密度金属对成像精度的影响提供理论和方法依据，有效提高双能CT的探测精度。本项目的研究成果将应用于我国的民航安检CT装备，促进我国民航安检技术的进步。

中文关键词： 安全检查；双能CT；爆炸物；探测；金属

英文摘要： X ray dual energy CT imaging technology has been widely used in the field of civil aviation security inspection and plays a more and more important role. The presence of high density metal in the package can reduce the imaging accuracy of dual energy CT, which affects the practical application of CT security equipment in civil aviation security. In order to overcome the technical difficulties, this project will study the qualitative and quantitative law of accuracy decline caused by high density metal based on the physical principle of dual energy CT imaging and by means of Monte Carlo simulation and analytical simulation. The technology and correction method for improving the accuracy of imaging will be designed based on the physical model of dual energy CT imaging. This project will provide theory and method basis for the influence of high density metal on the imaging accuracy and effectively improve the detection accuracy of dual energy CT .The research results of this project will be applied to our country's civil aviation security CT equipment, and promote the progress of our country's civil aviation security inspection technology.

英文关键词： security inspection;dual-energy CT;explosive ;detection;metal