Absorption, refraction and scattering retrieval in X-ray analyzer-based imaging

被引:9
|
作者
Wang, Zhili [1 ,2 ]
Liu, Dalin [1 ]
Zhang, Jin [3 ]
Huang, Wanxia [3 ]
Yuan, Qingxi [3 ]
Gao, Kun [4 ]
Wu, Zhao [4 ]
机构
[1] Hefei Univ Technol, Sch Elect & Appl Phys, Hefei 230009, Anhui, Peoples R China
[2] Capital Normal Univ, Beijing Adv Innovat Ctr Imaging Technol, Beijing 100048, Peoples R China
[3] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
[4] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Anhui, Peoples R China
来源
基金
中国国家自然科学基金;
关键词
X-ray imaging; phase contrast; analyzer-based imaging; information retrieval; USAXS; rocking curves; three-image algorithms; PHASE; RADIOGRAPHY; NOISE; ALGORITHM; BSRF;
D O I
10.1107/S1600577518007439
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
A three-image algorithm is proposed in order to retrieve the absorption, refraction and ultra-small-angle X-ray scattering (USAXS) properties of the object in X-ray analyzer-based imaging. Based on the Gaussian fitting to the rocking curve, the novel algorithm is theoretically derived and presented, and validated by synchrotron radiation experiments. Compared with multiple-image radiography, this algorithm only requires a minimum of three intensity measurements, and is therefore advantageous in terms of simplified acquisition procedure and reduced data collection times, which are especially important for specific applications such as in vivo imaging and phase tomography. Moreover, the retrieval algorithm can be specialized to particular cases where some degree of a priori knowledge on the object is available, potentially reducing the minimum number of intensity measurements to two. Furthermore, the effect of angular mis-alignment on the accuracy of the retrieved images was theoretically investigated, which can be of use in image interpretation and optimization of the data acquisition procedure.
引用
收藏
页码:1206 / 1213
页数:8
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