Convolution reconstruction algorithm for refraction-contrast computed tomography using a Laue-case analyzer for dark-field imaging
Convolution reconstruction algorithm for refraction-contrast computed tomography using a Laue-case analyzer for dark-field imaging
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DOI：
10.1364/ol.36.000391
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发表时间：
2011-02-01
期刊：
影响因子：
3.6
通讯作者：
Ando, Masami
中科院分区：
文献类型：
--
作者：
Sunaguchi, Naoki;Yuasa, Tetsuya;Ando, Masami
从几何光学中的射线方程出发，推导了一种利用暗场成像（DFI）光学系统的折射衬度CT重建算法。所提出的算法类似于常规CT中广泛使用的卷积重建技术。因此，该算法可以简单地实现，同时也是快速和稳定的。为了证明其有效性，我们构建了基于DFI光学组成的传输劳厄型角分析器在垂直摇摆器光束线BL-14 C在KEK的成像系统，并进行了初步的成像实验，使用物理体模，成功地获得DFI-CT图像使用该算法。(C)2011年美国光学学会
We derive a reconstruction algorithm for refraction-contrast computed tomography (CT) using dark-field imaging (DFI) optics, which can extract refraction information by a single shot, from the ray equation in geometrical optics. The proposed algorithm is similar to the convolution reconstruction technique widely used in conventional CT. Thus, this algorithm can be implemented simply while also being fast and stable. To demonstrate its validity, we constructed the imaging system based on DFI optics composed of a transmission Laue-type angular analyzer at the vertical wiggler beamline BL-14C in KEK and performed a preliminary imaging experiment using a physical phantom to successfully obtain the DFI-CT image using the proposed algorithm. (C) 2011 Optical Society of America