中国物理B ›› 2017, Vol. 26 ›› Issue (12): 120601-120601.doi: 10.1088/1674-1056/26/12/120601

• GENERAL • 上一篇    下一篇

Signal-to-noise ratio comparison of angular signal radiography and phase stepping method

Wali Faiz, Peiping Zhu(朱佩平), Renfang Hu(胡仁芳), Kun Gao(高昆), Zhao Wu(吴朝), Yuan Bao(鲍园), Yangchao Tian(田扬超)   

  1. 1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China;
    2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
    3. Shanghai United Imaging Healthcare Co. Ltd., Shanghai 201807, China
  • 收稿日期:2017-06-13 修回日期:2017-08-28 出版日期:2017-12-05 发布日期:2017-12-05
  • 通讯作者: Peiping Zhu, Peiping Zhu, Zhao Wu E-mail:zhupp@ihep.ac.cn;wuzhao@ustc.edu.cn;wuzhao@ustc.edu.cn
  • 基金资助:
    Project supported by the National Research and Development Project for Key Scientific Instruments (Grant No. CZBZDYZ20140002), the National Natural Science Foundation of China (Grant Nos. 11535015, 11305173, and 11375225), the project supported by Institute of High Energy Physics, Chinese Academy of Sciences (Grant No. Y4545320Y2), and the Fundamental Research Funds for the Central Universities (Grant No. WK2310000065). The author, Wali Faiz, acknowledges and wishes to thank the Chinese Academy of Sciences and The World Academy of Sciences (CAS-TWAS) President's Fellowship Program for generous financial support.

Signal-to-noise ratio comparison of angular signal radiography and phase stepping method

Wali Faiz1, Peiping Zhu(朱佩平)2, Renfang Hu(胡仁芳)3, Kun Gao(高昆)1, Zhao Wu(吴朝)1, Yuan Bao(鲍园)3, Yangchao Tian(田扬超)1   

  1. 1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China;
    2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
    3. Shanghai United Imaging Healthcare Co. Ltd., Shanghai 201807, China
  • Received:2017-06-13 Revised:2017-08-28 Online:2017-12-05 Published:2017-12-05
  • Contact: Peiping Zhu, Peiping Zhu, Zhao Wu E-mail:zhupp@ihep.ac.cn;wuzhao@ustc.edu.cn;wuzhao@ustc.edu.cn
  • Supported by:
    Project supported by the National Research and Development Project for Key Scientific Instruments (Grant No. CZBZDYZ20140002), the National Natural Science Foundation of China (Grant Nos. 11535015, 11305173, and 11375225), the project supported by Institute of High Energy Physics, Chinese Academy of Sciences (Grant No. Y4545320Y2), and the Fundamental Research Funds for the Central Universities (Grant No. WK2310000065). The author, Wali Faiz, acknowledges and wishes to thank the Chinese Academy of Sciences and The World Academy of Sciences (CAS-TWAS) President's Fellowship Program for generous financial support.

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摘要： Grating-based x-ray phase contrast imaging has the potential to be applied in future medical applications as it is compatible with both laboratory and synchrotron source. However, information retrieval methods are important because acquisition speed, scanning mode, image quality, and radiation dose depend on them. Phase-stepping (PS) is a widely used method to retrieve information, while angular signal radiography (ASR) is a newly established method. In this manuscript, signal-to-noise ratios (SNRs) of ASR are compared with that of PS. Numerical experiments are performed to validate theoretical results. SNRs comparison shows that for refraction and scattering images ASR has higher SNR than PS method, while for absorption image both methods have same SNR. Therefore, our conclusions would have guideline in future preclinical and clinical applications.

关键词: angular signal radiography (ASR), phase-stepping (PS), signal-to-noise ratio (SNRs), information retrieval method

Abstract: Grating-based x-ray phase contrast imaging has the potential to be applied in future medical applications as it is compatible with both laboratory and synchrotron source. However, information retrieval methods are important because acquisition speed, scanning mode, image quality, and radiation dose depend on them. Phase-stepping (PS) is a widely used method to retrieve information, while angular signal radiography (ASR) is a newly established method. In this manuscript, signal-to-noise ratios (SNRs) of ASR are compared with that of PS. Numerical experiments are performed to validate theoretical results. SNRs comparison shows that for refraction and scattering images ASR has higher SNR than PS method, while for absorption image both methods have same SNR. Therefore, our conclusions would have guideline in future preclinical and clinical applications.

Key words: angular signal radiography (ASR), phase-stepping (PS), signal-to-noise ratio (SNRs), information retrieval method

中图分类号:  (Spatial dimensions)

  • 06.30.Bp
42.30.Rx (Phase retrieval) 05.40.Ca (Noise) 42.25.Fx (Diffraction and scattering)