Speckle properties of the logarithmically transformed signal in optical coherence tomography

被引：10

作者：

Lee, Peng ^{[1
]}

Gao, Wanrong ^{[1
]}

Zhang, Xianling ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Sch Elect Engn & Optoelect Tech, Dept Opt Engn, Nanjing 210094, Jiangsu, Peoples R China

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2011年 / 28卷 / 04期

基金：

中国国家自然科学基金;

关键词：

WAVELENGTH RANGE; 2200; NM; SCATTERING; CONTRAST; DERMATOLOGY; STATISTICS; TISSUE; MEDIA; SKIN; MICROSCOPY;

D O I：

10.1364/JOSAA.28.000517

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We discuss the statistical properties of speckle of the logarithmically transformed signal in optical coherence tomography (OCT) both theoretically and experimentally. OCT signals of Intralipid solution with different volume particle concentrations. (correspondingly, scattering coefficient mu(s) ranges from 1.25 to 25: 11mm(-1)) were measured and analyzed under two different focusing conditions [numerical apertures (NAs) of the objective lens of 0.13 and 0.25]. We found that the effect of the speckle noise can be suppressed by displaying OCT images in the logarithmic scale and by using the objective lens with a higher NA. We also found that the speckle properties are correlated with the scattering properties of the sample, which may be used to characterize the scattering properties of biological tissue. The simulated OCT image and the in vitro OCT image of a rat liver are used as examples to demonstrate the feasibility of the method. (C) 2011 Optical Society of America

引用

页码：517 / 522

页数：6

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