Yang Yimeng, Yang Feifei, Hingerl Ferdinand F, Xiao Xianghui, Liu Yijin, Wu Ziyu, Benson Sally M, Toney Michael F, Andrews Joy C, Pianetta Piero
Tianjin Yaohua High School, 106 Nanjing Road, Tianjin 300040, People's Republic of China.
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230027, People's Republic of China.
J Synchrotron Radiat. 2015 Mar;22(2):452-7. doi: 10.1107/S160057751402726X. Epub 2015 Feb 4.
There is high demand for efficient, robust and automated routines for tomographic data reduction, particularly for synchrotron data. Registration of the rotation axis in data processing is a critical step affecting the quality of the reconstruction and is not easily implemented with automation. Existing methods for calculating the center of rotation have been reviewed and an improved algorithm to register the rotation axis in tomographic data is presented. The performance of the proposed method is evaluated using synchrotron-based microtomography data on geological samples with and without artificial reduction of the signal-to-noise ratio. The proposed method improves the reconstruction quality by correcting both the tilting error and the translational offset of the rotation axis. The limitation of this promising method is also discussed.
对于断层扫描数据简化，尤其是同步加速器数据，人们对高效、稳健且自动化的程序有很高的需求。数据处理中旋转轴的配准是影响重建质量的关键步骤，并且不容易通过自动化实现。本文回顾了现有的计算旋转中心的方法，并提出了一种改进算法用于在断层扫描数据中配准旋转轴。使用基于同步加速器的微观断层扫描数据对地质样品进行评估，该数据有和没有人为降低信噪比的情况。所提出的方法通过校正旋转轴的倾斜误差和平移偏移来提高重建质量。还讨论了这种有前景的方法的局限性。
