Open AccessAbsorption, refraction and scattering retrieval in X‐ray analyzer‐based imaging
Author(s) -
Wang Zhili,
Liu Dalin,
Zhang Jin,
Huang Wanxia,
Yuan Qingxi,
Gao Kun,
Wu Zhao
Publication year - 2018
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577518007439
Subject(s) - optics , refraction , phase retrieval , synchrotron radiation , computer science , a priori and a posteriori , scattering , gaussian , data acquisition , physics , computer vision , algorithm , artificial intelligence , fourier transform , philosophy , epistemology , quantum mechanics , operating system
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.