Bronnikov-aided correction for x-ray computed tomography
Bronnikov-aided correction for x-ray computed tomography
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DOI：
10.1364/josaa.26.000890
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发表时间：
2009-04-01
影响因子：
1.9
通讯作者：
Van Hoorebeke, Luc
中科院分区：
文献类型：
--
作者：
De Witte, Yoni;Boone, Matthieu;Van Hoorebeke, Luc
当用微聚焦x射线管和高分辨率探测器在x射线计算机断层扫描装置上扫描极低吸收样品时，得到的投影图像不仅包含吸收对比，还包含相衬。虽然没有相位信号的图像可以很好地重建，但这种混合相位和吸收图像会在重建的切片中产生严重的伪影。本文描述了一种对这些混合投影进行校正以去除相位信号的方法。这些校正后的图像可以使用标准滤波反投影算法进行处理，以获得只有很少或没有相位伪影的重建。这种新方法，我们称之为布朗尼科夫辅助矫正（BAC），可以用于各种各样的应用，而不需要额外的努力。对生物和药物样品进行了测试，并将结果与常规重建方法进行了比较，对结果进行了评价和讨论。(C) 2009年美国光学学会
When a very-low-absorbing sample is scanned at an x-ray computed tomography setup with a microfocus x-ray tube and a high-resolution detector, the obtained projection images contain not only absorption contrast but also phase contrast. While images without a phase signal can be reconstructed very well, such mixed phase and absorption images give rise to severe artifacts in the reconstructed slices. A method is described that applies a correction to these mixed projections to remove the phase signal. These corrected images can then be processed using a standard filtered backprojection algorithm to obtain reconstructions with only few or no phase artifacts. This new method, which we call the Bronnikov-aided correction (BAC), can be used in a broad variety of applications and without much additional effort. It is tested on a biological and a pharmaceutical sample, and results are evaluated and discussed by comparing them with those of conventional reconstruction methods. (C) 2009 Optical Society of America