Improvement of the dynamic range using background subtraction in single shot wide-field optical coherence tomography
Improvement of the dynamic range using background subtraction in single shot wide-field optical coherence tomography
复制标题
在单次宽视场光学相干断层扫描中使用背景扣除来改善动态范围
DOI：
10.1080/09500340.2014.995734
复制
发表时间：
2015
影响因子：
1.3
通讯作者：
Dalip Singh Mehta and Manabu Sato
中科院分区：
文献类型：
--
作者：
Tulsi Anna;Dalip Singh Mehta and Manabu Sato
为了提高单炮广场光学相干层析成像(SS-WF-OCT)系统的动态范围(DR)，对其信号进行了研究。SS-WF-OCT系统基于二维偏振迈克尔逊干涉仪和超辐射二极管(中心波长为842.5 nm)作为光源。用一台π摄像机同时采集两幅面阵相移干涉图，相减后用二维希尔伯特变换得到面像(面积(X)4.0m m×m(Y)4.3m m)。对含有非相干背景噪声的OCT信号进行了分析。为了改善DR，引入了背景噪声减除法，并给出了其测量过程。该方法在背景噪声稳定的情况下具有一定的实用价值。使用背景减去算法对金属研磨和聚合物海绵等散射样品进行处理，显著降低了背景噪声，改善了DR。
We investigated on the signal in single shot wide-field optical coherence tomographic (SS-WF-OCT) system to improve the dynamic range (DR). The SS-WF-OCT system is based on two-dimensional (2D) polarization Michelson interferometer and superluminescent diode (center wavelength of 842.5 nm) as light source. Twoπ-phase-shifted interferograms were acquired simultaneously using a single CCD camera and after subtraction, theen-faceOCT image (area (x) 4.0 mm × (y) 4.3 mm) is obtained using 2D Hilbert transform. The OCT signal including incoherent background noises was analyzed. To improve the DR, background noise subtraction has been introduced and its measurement process is presented. This method is valuable during the background noise is stable. Using the scattering samples, such as, grind metal and polymer sponge with background subtraction algorithm, a significant reduction in background noise and improvement in the DR was demonstrated .