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一种用于中子散射成像的快速反投影重建方法

A fast back-projection reconstruction method for fast neutron scatter imaging

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摘要

针对中子散射成像建立了一种快速反投影重建方法,这种方法首先根据每一个散射事件确定粒子可能所在的空间范围,然后该空间范围中进行重建,大大减少了重建的运行时间。应用所建立的方法对模拟的成像数据进行处理,结果表明:重建源与实际源的位向一致,对1000个散射数据进行处理,用时约3 s;对5探测单元成像得到的模拟数据处理,得到重建后点源的位向分辨为8.0°;重建源的位向分辨不随设定重建平面的位置而改变,但重建平面距探测平面越近,重建速度越快;当重建平面达到一定尺寸时,继续增加大重建平面尺寸,重建的运行时间增加不明显,该方法在大视场空间探测成像应用中,具有较高的重建效率。

Abstract

A fast back-projection method is established. This method does not need to search all image space, but just to check and search the pixels inside the scope determined by scatter events. So the computational speed of image reconstruction is greatly improved. This method is applied to data from a simulation prototype of a neutron scatter camera with five detector elements. The results show that the reconstruction result is the same as the true point source at azimuth, and it takes only 3 seconds to process 1000 scatter events by this method, the angular resolution of reconstruction result is 8.0°. The influence of the reconstruction parameters on runtime and resolution was analyzed,and the conclusion indicates that this method is of advantage to reconstruction the distribution of neutron source for neutron detection in large field of view.

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中图分类号:TL816.3

DOI:10.11884/hplpb201426.054003

所属栏目:研究快报

基金项目:国家自然科学基金项目(11105106)

收稿日期:2013-08-14

修改稿日期:2013-11-15

网络出版日期:--

作者单位    点击查看

张美:西北核技术研究所, 西安 710024强脉冲辐射与模拟效应国家重点实验室, 西安 710024
张显鹏:西北核技术研究所, 西安 710024西安交通大学 能源与动力工程学院, 西安 710049
李阳:西北核技术研究所, 西安 710024
盛亮:西北核技术研究所, 西安 710024强脉冲辐射与模拟效应国家重点实验室, 西安 710024
李斌康:西北核技术研究所, 西安 710024强脉冲辐射与模拟效应国家重点实验室, 西安 710024
李奎念:西北核技术研究所, 西安 710024
张小东:西北核技术研究所, 西安 710024
魏福利:西北核技术研究所, 西安 710024
赵吉祯:西北核技术研究所, 西安 710024
袁媛:西北核技术研究所, 西安 710024

联系人作者:张美(zandwnever@163.com)

备注:张美(1979—), 男,副研究员,从事辐射场时空分辨测量研究

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引用该论文

Zhang Mei,Zhang Xianpeng,Li Yang,Sheng Liang,Li Binkang,Li Kuinian,Zhang Xiaodong,Wei Fuli,Zhao Jizhen,Yuan Yuan. A fast back-projection reconstruction method for fast neutron scatter imaging[J]. High Power Laser and Particle Beams, 2014, 26(5): 054003

张美,张显鹏,李阳,盛亮,李斌康,李奎念,张小东,魏福利,赵吉祯,袁媛. 一种用于中子散射成像的快速反投影重建方法[J]. 强激光与粒子束, 2014, 26(5): 054003

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