原子能科学技术2017，Vol.51Issue(11)：2075-2078,4.DOI:10.7538/yzk.2017.youxian.0225
X射线CT成像条状伪影校正
Streak Artifact Correction in X-ray CT Imaging
摘要
Abstract
During the procedure of X-ray CT imaging , the streak artifact caused by photon starvation depresses the CT image quality and increases the statistical error of numerical value in CT image ,and the material detection results will be influenced .In this paper ,an adaptive streak artifact correction method was put forward .According to the proposed method ,the length of median filter window was determined based on the projection value .For the situation that multiple adjacent detector elements were in the case of photon starvation ,a suitable threshold was set .The projection value after adap-tive median filter was firstly judged .If the modified projection value is greater than the threshold ,the length of median filter window increases until the judgment criteria are satisfied .Actual experimental results verify the effectiveness of the method in this paper .The proposed method is simple and easily performed ,and it is suitable to engi-neering application .关键词
安全检查/X射线CT/光子饥饿/条状伪影/中值滤波Key words
security inspection/X-ray CT/photon starvation/streak artifact/median filter分类
信息技术与安全科学引用本文复制引用
李保磊,莫阳,张萍宇,李斌,张耀军..X射线CT成像条状伪影校正[J].原子能科学技术,2017,51(11):2075-2078,4.基金项目
国家自然科学基金资助项目(U1533124) （U1533124）
