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
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.
Fund: 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.
Precise relative rotation sensing using slow light Wang Nan(王楠), Zhang Yun-Dong(掌蕴东), Wang Hao(王号), Tian He(田赫), Qiu Wei(邱巍), Wang Jin-Fang(王金芳), and Yuan Ping(袁萍). Chin. Phys. B, 2010, 19(1): 014216.
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