强激光与粒子束2011，Vol.23Issue(8)：2047-2051,5.DOI:10.3788/HPLPB20112308.2047
闪光照相中MeV级网栅的设计
Design of MeV anti-scatter grid in flash radiography
摘要
Abstract
Scattered radiation, which seriously decreases the precision of image reconstruction in high energy flash X-ray ra diography, can be largely diminished by anti-scatter grid. The design aim of MeV anti-scatter grid is firstly presented, and the rs diographic system layout and the imaging system are gtven using theoretic analysis. Then parameters of anti-scatter grid, such as the total thickness, aperture and space between holes- and the thickness of W thin foil with small holes, are detailed using Monte Carlo simulation and analysis. Effects of the machining error and imperfect alignments of radiographic components on the perform ante of MeV anti-scatter grid are also discussed, and design parameters of the prototype of anti-scatter grid arc presented. With the designed anti-scatter grid, the calculated radiograph using Monte Carlo code are preprocessed, such as image mend and image restoration and interpolation. It is shown that the designed prototype can be used in high energy flash X-ray radiography.关键词
MeV级网栅/散射/蒙特卡罗模拟/闪光照相Key words
MeV anti-scatter grid/scatter/Monte Carlo simulation/flash radiography分类
医药卫生引用本文复制引用
刘军,刘进,管永红,景越峰..闪光照相中MeV级网栅的设计[J].强激光与粒子束,2011,23(8):2047-2051,5.基金项目
中国工程物理研究院科学技术发展基金项目(2009A0203013,2010B0202021) （2009A0203013,2010B0202021）
