Ring artifacts correction based on the projection-field in neutron CT

• 作者: Sheng-Xiang Wang Jie Chen Zhi-Jian Tan Si-Hao Deng Yao-Da Wu Huai-Le Lu Shou-Ding Li Wei-Chang Chen Lun-Hua He
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（5）
• 所属期刊栏目: GENERAL
• 页码范围: 299-304
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/abd743

摘要

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.