A laboratory based edge-illumination x-ray phase-contrast imaging setup with two-directional sensitivity
A laboratory based edge-illumination x-ray phase-contrast imaging setup with two-directional sensitivity
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DOI：
10.1063/1.4935983
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发表时间：
2015-11-16
影响因子：
4
通讯作者：
Olivo, Alessandro
中科院分区：
文献类型：
--
作者：
Kallon, Gibril K.;Wesolowski, Michal;Olivo, Alessandro
我们报告一个初步的实验室为基础的X射线相衬成像系统能够实现双向相位灵敏度，由于使用L形孔径。我们表明，除了表观吸收，一个对象的两个方向的微分相位图像可以定量检索仅使用三个输入图像。我们还验证了知识的相位导数沿着两个方向允许直接的相位积分没有条纹文物，一个已知的问题，共同的所有差分相位技术。此外，提出了一种分析方法的2方向暗场检索和实验证明。(c)2015年作者。
We report on a preliminary laboratory based x-ray phase-contrast imaging system capable of achieving two-directional phase sensitivity, thanks to the use of L-shaped apertures. We show that in addition to apparent absorption, two-directional differential phase images of an object can be quantitatively retrieved by using only three input images. We also verify that knowledge of the phase derivatives along both directions allows for straightforward phase integration with no streak artefacts, a known problem common to all differential phase techniques. In addition, an analytical method for 2-directional dark field retrieval is proposed and experimentally demonstrated. (c) 2015 Author(s).