Vo Nghia T, Drakopoulos Michael, Atwood Robert C, Reinhard Christina
Opt Express. 2014 Aug 11;22(16):19078-86. doi: 10.1364/OE.22.019078.
High-throughput processing of parallel-beam X-ray tomography at synchrotron facilities is lacking a reliable and robust method to determine the center of rotation in an automated fashion, i.e. without the need for a human scorer. Well-known techniques based on center of mass calculation, image registration, or reconstruction evaluation work well under favourable conditions but they fail in cases where samples are larger than field of view, when the projections show low signal-to-noise, or when optical defects dominate the contrast. Here we propose an alternative technique which is based on the Fourier analysis of the sinogram. Our technique shows excellent performance particularly on challenging data.
在同步加速器设施中，平行束X射线断层扫描的高通量处理缺乏一种可靠且强大的方法来自动确定旋转中心，即无需人工评分者。基于质心计算、图像配准或重建评估的知名技术在有利条件下效果良好，但在样本大于视野、投影显示低信噪比或光学缺陷主导对比度的情况下会失效。在此，我们提出一种基于正弦图傅里叶分析的替代技术。我们的技术在处理具有挑战性的数据时表现出色。
