中子半影成像图像反演方法研究  

Image reconstruction technique for neutron penumbra imaging

作　　者：刘东剑[1] 唐昶环[2] 赵宗清[2] 董建军[2] 安竹[1] 

机构地区：[1]四川大学原子核科学与技术研究所辐射物理及技术教育部重点实验室,成都610064 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《强激光与粒子束》2006年第7期1199-1202,共4页High Power Laser and Particle Beams

基　　金：四川大学辐射物理及技术教育部重点实验室开放课题基金资助(2004-06)

摘　　要：给出了中子半影成像技术的原理;分析了系统分辨率的影响因子;利用MCNP软件对中子半影成像过程进行模拟;用改进的逆滤波和维纳滤波两种方法对成像主轴上一点源和偏轴两点源的编码图像进行重建,并对编码像在降低噪声和去除本底前后的反演结果进行了比较。模拟结果表明维纳滤波法能够更好地抑制统计噪声。The principle of the neutron penumbra imaging was introduced, and the effect factors of the resolution of the imaging system were analyzed. The neutron penumbra imaging process was simulated with MCNP software. The coded image of one point source on the imaging principal axis and that of two point souces off the principal axis with and without noise and background were reconstructed by the improved inverse filter and Wiener filter method respectively. The simulation results indicated that the Wiener filter method could restrain noise better.

关 键 词：惯性约束聚变 点扩散函数 半影成像 图像反演 编码 

分 类 号：TL657[核科学技术—核技术及应用]