Biases of estimated signals in x-ray analyzer-based imaging

doi:10.1088/1674-1056/ab8887

中国物理B ›› 2020, Vol. 29 ›› Issue (6): 68703-068703.doi: 10.1088/1674-1056/ab8887

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Biases of estimated signals in x-ray analyzer-based imaging

Jianlin Xia(夏健霖), Wen Xu(徐文), Ruicheng Zhou(周瑞成), Xiaomin Shi(石晓敏), Kun Ren(任坤), Heng Chen(陈恒), Zhili Wang(王志立)

School of Electronic Science&Applied Physics, Hefei University of Technology, Hefei 230009, China

收稿日期:2019-12-15 修回日期:2020-04-02 出版日期:2020-06-05 发布日期:2020-06-05
通讯作者: Zhili Wang E-mail:dywangzl@hfut.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. U1532113, and 11475170) and the Fundamental Research Funds for the Central Universities, China (Grant No. PA2020GDKC0024).

Biases of estimated signals in x-ray analyzer-based imaging

Jianlin Xia(夏健霖), Wen Xu(徐文), Ruicheng Zhou(周瑞成), Xiaomin Shi(石晓敏), Kun Ren(任坤), Heng Chen(陈恒), Zhili Wang(王志立)

School of Electronic Science&Applied Physics, Hefei University of Technology, Hefei 230009, China

Received:2019-12-15 Revised:2020-04-02 Online:2020-06-05 Published:2020-06-05
Contact: Zhili Wang E-mail:dywangzl@hfut.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. U1532113, and 11475170) and the Fundamental Research Funds for the Central Universities, China (Grant No. PA2020GDKC0024).

摘要/Abstract

摘要： Recently, a novel three-image algorithm has been proposed to retrieve the sample's absorption, refraction, and scattering properties in x-ray analyzer-based imaging. The feasibility of the three-image algorithm was validated by synchrotron radiation experiments. However, it is unclear yet whether the estimated refraction and scattering signals are biased or not and how the analyzer angular position affects the biases in the estimated signals. For this purpose, the biases of the extracted refraction and scattering signals are theoretically derived for the three-image algorithm. The theoretical models are further confirmed by numerical experiments. The results show that both the estimated refraction and scattering signals are biased, and the biases are strongly dependent on the analyzer angular position. Besides, the biases also show dependence on the sample's refraction and scattering properties locally. Those results can be used as general guidelines to optimize experimental parameters for bias reduction and accurate imaging of different features within the sample.

关键词: x-ray imaging, analyzer-based imaging, three-image algorithm

Abstract: Recently, a novel three-image algorithm has been proposed to retrieve the sample's absorption, refraction, and scattering properties in x-ray analyzer-based imaging. The feasibility of the three-image algorithm was validated by synchrotron radiation experiments. However, it is unclear yet whether the estimated refraction and scattering signals are biased or not and how the analyzer angular position affects the biases in the estimated signals. For this purpose, the biases of the extracted refraction and scattering signals are theoretically derived for the three-image algorithm. The theoretical models are further confirmed by numerical experiments. The results show that both the estimated refraction and scattering signals are biased, and the biases are strongly dependent on the analyzer angular position. Besides, the biases also show dependence on the sample's refraction and scattering properties locally. Those results can be used as general guidelines to optimize experimental parameters for bias reduction and accurate imaging of different features within the sample.

Key words: x-ray imaging, analyzer-based imaging, three-image algorithm

中图分类号: (X-ray imaging)

87.59.-e

43.60.Cg (Statistical properties of signals and noise) 42.30.Rx (Phase retrieval) 41.50.+h (X-ray beams and x-ray optics)

夏健霖, 徐文, 周瑞成, 石晓敏, 任坤, 陈恒, 王志立. Biases of estimated signals in x-ray analyzer-based imaging[J]. 中国物理B, 2020, 29(6): 68703-068703.

Jianlin Xia(夏健霖), Wen Xu(徐文), Ruicheng Zhou(周瑞成), Xiaomin Shi(石晓敏), Kun Ren(任坤), Heng Chen(陈恒), Zhili Wang(王志立). Biases of estimated signals in x-ray analyzer-based imaging[J]. Chin. Phys. B, 2020, 29(6): 68703-068703.

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Biases of estimated signals in x-ray analyzer-based imaging

Biases of estimated signals in x-ray analyzer-based imaging

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