偏振频域光学相干层析成像中散斑噪声降低方法  

Speckle Noise Reduction in Fourier Domain Polarization-Sensitive Coherence Tomography by Split-Spectrum

作　　者：陈艳[1,2] 李中梁 南楠[1] 步扬 王瑄[1,2] 潘柳华[1,2] 王向朝 Chen Yan;Li Zhongliang;Nan Nan;Bu Yang;Wang Xuan;Pan Liuhua;Wang Xiangzhao(Laboratory of Information Optics and Opto-Electronic Technology,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海光学精密机械研究所信息光学与光电技术实验室,上海201800 [2]中国科学院大学,北京100049

出　　处：《光学学报》2018年第8期335-343,共9页Acta Optica Sinica

基　　金：上海市科学技术委员会创新行动计划(15441905600);广西高校光电信息处理重点实验室开放基金资助项目(KFJJ2016-04)

摘　　要：偏振频域光学相干层析成像(OCT)中图像质量受散斑噪声影响较大,散斑噪声会使图像细节变模糊,降低图像清晰度。针对此问题,提出了一种分光谱降低偏振频域OCT散斑噪声的方法。该方法将系统的全光谱信号分为多个光谱信号,对每个分立的光谱信号进行窗函数滤波,单独进行常规数据处理,然后将处理后的各个分光谱进行平均合成,达到降低散斑噪声的目的。利用Matlab进行仿真,同时搭建实验系统对离体生物样品鸡胸肉进行检测。实验结果表明,该方法可有效降低散斑噪声,提高偏振图像质量。Speckle noise is one of the main limiting factors for the image quality of Fourier domain polarizationsensitive optical coherence tomography（FD-PS-OCT）.It reduces image contrast and makes tissue boundaries blurred.In order to improve the image quality,a split-spectrum method for speckle noise reduction is proposed.The method splits FD-PS-OCT interference spectrum into several narrower spectrum.Then a filtering window function is performed on every individual narrower spectrum.After the traditional FD-PS-OCT data processing,the several individual spectrums can be averaged to suppress speckle noise.Simulations and experiments show that the proposed method can reduce speckle noise effectively and improve the image quality.

关 键 词：成像系统 偏振光学相干层析成像 散斑噪声 分光谱 

分 类 号：O436[机械工程—光学工程]