Improving the efficiency of small-angle x-ray scattering computed tomography using the OSEM algorithm
Hu, T; Wang, YD; Du, GH; Wang, YZ; Hua, WQ; Deng, BA; Xie, HL; Bian, FG; Xiao, TQ
2017
发表期刊APPLIED OPTICS
ISSN1559-128X
卷号56期号:30页码:8326-8334
文章类型期刊论文
摘要Small-angle x-ray scattering computed tomography (SAXS-CT) is a nondestructive method for the nanostructure analysis of heterogeneous materials. However, the limits of a long data acquisition time and vast amounts of data prevent SAXS-CT from becoming a routine experimental method in the applications of synchrotron radiation. In this study, the ordered subsets expectation maximization (OSEM) algorithm is introduced to improve the efficiency of SAXS-CT. To demonstrate the practicability of this method, a systematic simulation and experiments were carried out. The simulation results on a numerical phantom show that the OSEM-based SAXS-CT can effectively eliminate streaking artifacts and improve the efficiency of data acquisition by at least 3 times compared with the filter backprojection algorithm. By compromising the reconstruction speed and image quality, the optimal reconstruction parameters are also given for the image reconstruction in the OSEM-based SAXS-CT experiments. An experiment on a bamboo sample verified the validity of the proposed method with limited projection data. A further experiment on polyethylene demonstrated that the OSEM-based SAXS-CT is able to reveal the local nanoscale information about the crystalline structure and distributional difference inside the sample. In conclusion, the OSEM-based SAXS-CT can significantly improve experimental efficiency, which may promote SAXS-CT becoming a conventional method. (C) 2017 Optical Society of America
关键词Ordered-subsets Image-reconstruction Bone Nanostructure Brain Ct
DOI10.1364/AO.56.008326
关键词[WOS]ORDERED-SUBSETS ; IMAGE-RECONSTRUCTION ; BONE ; NANOSTRUCTURE ; BRAIN ; CT
收录类别SCI
语种英语
WOS记录号WOS:000413345300004
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28690
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
GB/T 7714
Hu, T,Wang, YD,Du, GH,et al. Improving the efficiency of small-angle x-ray scattering computed tomography using the OSEM algorithm[J]. APPLIED OPTICS,2017,56(30):8326-8334.
APA Hu, T.,Wang, YD.,Du, GH.,Wang, YZ.,Hua, WQ.,...&Xiao, TQ.(2017).Improving the efficiency of small-angle x-ray scattering computed tomography using the OSEM algorithm.APPLIED OPTICS,56(30),8326-8334.
MLA Hu, T,et al."Improving the efficiency of small-angle x-ray scattering computed tomography using the OSEM algorithm".APPLIED OPTICS 56.30(2017):8326-8334.
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