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中子半影成像图像反演方法研究
引用本文:刘东剑,唐昶环,赵宗清,董建军,安竹.中子半影成像图像反演方法研究[J].强激光与粒子束,2006,18(7):1199-1202.
作者姓名:刘东剑  唐昶环  赵宗清  董建军  安竹
作者单位: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;3. 清华大学 工程物理系, 北京 100084
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。

关 键 词:惯性约束聚变  点扩散函数  半影成像  图像反演  编码
文章编号:1001-4322(2006)07-1199-04
收稿时间:2006-01-22
修稿时间:2006-04-26

Image reconstruction technique for neutron penumbra imaging
LIU Dong-jian,TANG Chang-huan,ZHAO Zong-qing,DONG Jian-jun,AN Zhu.Image reconstruction technique for neutron penumbra imaging[J].High Power Laser and Particle Beams,2006,18(7):1199-1202.
Authors:LIU Dong-jian  TANG Chang-huan  ZHAO Zong-qing  DONG Jian-jun  AN Zhu
Institution:1. Institute of Nuclear Science and Technology, Key Laboratory of Radiation Physics and Technology of Education Ministry, Sichuan University, Chengdu 610064, China;2. Research Center of Laser Fusion, CAEP, P.O.Box 919-986, Mianyang 621900, China;3. Department of Engineering Physics, Tsinghua University, Beijing 100084, China
Abstract: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.
Keywords:Inertial confinement fusion  Point spread function(PSF)  Penumbra imaging  Image reconstruction  Coding
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