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Comparative analysis of phase extraction methods based on phase-stepping and shifting curve in grating interferometry |
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| Authors: | Liu Xiao-Song Li En-Rong Zhu Pei-Ping Liu Yi-Jin Zhang Kai Wang Zhi-Li Hong You-Li Zhang Hui-Tao Yuan Qing-Xi Huang Wan-Xia and Wu Zi-Yu |
| Institution: | Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; Department of Physics, University of Science and Technology of China, Hefei 230026, China; National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China; School of Mathematical Sciences, Capital Normal University, Beijing 100048, China |
| Abstract: | Two phase extraction methods which are based separately on phase-stepping and shifting curve are mainly used in phase-sensitive imaging in gating interferometry to determine the x-ray phase shift induced by an object in the beam. In this paper, the authors perform a full comparative analysis and present the main virtues and limitations of these two methods according to the theoretical analysis of the grating interferometry. |
| Keywords: | x-ray phase sensitive imaging grating interferometer phase-stepping shifting curve |
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