基于补偿特征图滤波算法去除光学相干层析造影成像俯视图的运动伪影  

Removal of Motion Artifact in Top View of Optical Coherence Tomography Angiography Based on Compensated Eigenimage Filtering Algorithm

作　　者：任汉宏 黄伟源[1] 吴南寿 吴家怡 林嘉怡 吴泳波[1] 郑楚君[1] 姜小芳 唐志列[1,2] Ren Hanhong;Huang Weiyuan;Wu Nanshou;Wu Jiayi;Lin Jiayi;Wu Yongbo;Zheng Chujun;Jiang Xiaofang;Tang Zhilie(School of Physics and Telecommunication Engineering,South China Normal University,Guangzhou,Guangdong 510006,China;Gunngdong Provincial Key Labovatory of Quantum Conutrol Engineering and Quantum Materials,Guangzhou,Guangdong 510006,China)

机构地区：[1]华南师范大学物理与电信工程学院,广东广州510006 [2]广东省量子调控工程与材料重点实验室,广东广州510006

出　　处：《激光与光电子学进展》2021年第22期124-131,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61575067);广东省自然科学基金(2016A030310432,2017A030313287);广州市科技计划(202002030148)。

摘　　要：运动伪影是光学相干层析造影成像(OCTA)俯视图中的一个重要问题。提出一种补偿特征图像滤波(CEF)算法去除光学相干层析造影成像俯视图的运动伪影。首先,利用奇异值分解(SVD)将光学相干层析造影成像俯视图展开为一系列的特征图像;然后,利用高通特征图像和从第一特征图像中抽取得到的正交补偿积这两部分来重建恢复图像。实验结果表明,CEF算法能较好地去除条纹噪声,经CEF算法复原得到的图像有着较传统特征图滤波算法更好的图像质量。该算法为其他扫描成像系统去除类似的条纹噪声提供了新的参考。Motion artifact is a crucial issue in optical coherence tomography angiography(OCTA)top view.A compensated eigenimage filtering(CEF)algorithm is proposed to remove the motion artifact in the top view of OCTA.First,the top view of OCTA is expanded into a series of eigenimages by singular value decomposition(SVD);then,the high-pass eigenimage and the orthogonal compensation product extracted from the first feature image are used to reconstruct the restored image.Experimental results verify that the CEF algorithm can remove stripe noise better,and the image recovered by CEF algorithm has better image quality than the traditional eigenimage filtering algorithm.The CEF algorithm provides a new reference for other scanning imaging systems removing similar stripe noise.

关 键 词：图像处理 光学相干层析造影成像 运动伪影 条纹噪声 奇异值分解 特征图滤波 

分 类 号：O436[机械工程—光学工程]