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Chin. Phys. B, 2021, Vol. 30(5): 050601    DOI: 10.1088/1674-1056/abd743
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Ring artifacts correction based on the projection-field in neutron CT

Sheng-Xiang Wang(王声翔)1,2, Jie Chen(陈洁)1,2,†, Zhi-Jian Tan(谭志坚)1,2, Si-Hao Deng(邓司浩)1,2, Yao-Da Wu(吴耀达)1,2, Huai-Le Lu(卢怀乐)1,2, Shou-Ding Li(李守定)4,5,6, Wei-Chang Chen(陈卫昌)4,5,6, and Lun-Hua He(何伦华)1,3,‡
1 Spallation Neutron Source Science Center, Dongguan 523803, China;
2 Institute of High Energy Physics, Chinese Academy of Sciences(CAS), Beijing 100049, China;
3 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
4 Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
5 Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing 100029, China;
6 College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract  Ring artifacts will happen mostly when the detector has inconsistent response among the detector channels, and the characteristic produced rings centered in the iso-center in the reconstructed slices inevitably affect the recognition and analysis of the corresponding sample structures in neutron computed tomography (CT). In this work, a ring correction method based on the projection-field (RCP) is proposed, it is a pre-processing method and provides the corrected projection data directly, which is also conducive to efficient data storage and other algorithmic researches. Simulation and physical experiments are performed for verifying the effect of the method, and one of the correction methods based on the image-field is used for comparison. The results demonstrate that the RCP can correct the ring artifacts well without reducing the image resolution or over-correction.
Keywords:  ring artifacts correction      neutron CT      projection field  
Received:  18 August 2020      Revised:  21 December 2020      Accepted manuscript online:  30 December 2020
PACS:  06.20.fb (Standards and calibration)  
  07.05.Rm (Data presentation and visualization: algorithms and implementation)  
Fund: Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0401502 and 2017YFB0701903), the National Natural Science Foundation of China (Grant Nos. U1832219 and 12005166), the Youth Innovation Promotion Association, the Chinese Academy of Sciences (CAS) (Grant No. 2017023), the Guangdong Natural Science Foundation, China (Grant No. 2016A030313129), the Key Research Program of the Institute of Geology & Geophysics, CAS (Grant Nos. IGGCAS-201903 and SZJJ201901), and the Key Research Program, CAS (Grant Nos. YJKYYQ20190043, ZDBS-LY-DQC003, XDA14040401, and KFZD-SW-422).
Corresponding Authors:  Jie Chen, Lun-Hua He     E-mail:  chenjie@ihep.ac.cn;lhhe@aphy.iphy.ac.cn

Cite this article: 

Sheng-Xiang Wang(王声翔), Jie Chen(陈洁), Zhi-Jian Tan(谭志坚), Si-Hao Deng(邓司浩), Yao-Da Wu(吴耀达), Huai-Le Lu(卢怀乐), Shou-Ding Li(李守定), Wei-Chang Chen(陈卫昌), and Lun-Hua He(何伦华) Ring artifacts correction based on the projection-field in neutron CT 2021 Chin. Phys. B 30 050601

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