Improvement of spectral domain OCT image quality by linear interpolation and CCD response compensation

ZHANG Tae-Sok; LI Gang; ZHENG Yu; LIN Ling; LIU Jing-jing

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Improvement of spectral domain OCT image quality by linear interpolation and CCD response compensation

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- Improvement of spectral domain OCT image quality by linear interpolation and CCD response compensation
- Optics and Precision Engineering Vol. 14, Issue 5, Pages: 929-933(2006)
- 作者机构：
  
  1. 天津大学精密仪器与光电子工程学院天津,300072
  2. 金日成综合大学物理学院,朝鲜
- 作者简介：
- 基金信息：
- DOI：
  CLC： O433.4;O436.1
- Received：14 February 2006，
  
  Revised：18 August 2006，
  
  Published Online：30 October 2006，
  
  Published：30 October 2006
- 稿件说明：
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ZHANG Tae-Sok, LI Gang, ZHENG Yu, et al. Improvement of spectral domain OCT image quality by linear interpolation and CCD response compensation[J]. Optics and precision engineering, 2006, 14(5): 929-933.
DOI：

ZHANG Tae-Sok, LI Gang, ZHENG Yu, et al. Improvement of spectral domain OCT image quality by linear interpolation and CCD response compensation[J]. Optics and precision engineering, 2006, 14(5): 929-933. DOI：

摘要

在频谱光学相干析成像(频谱OCT)系统中普遍使用的CCD采样的数据是波长的函数。CCD对不同波长的信号具有不同的响应

而且图像重建进行的傅里叶逆变换所需要的数据是波数的函数

忽略这两个问题对频谱OCT成像质量的影响比较大。基于以上分析

提出了响应度补偿法和波长数据-波数数据转换线性补偿法

并对样品进行了实验验证。实验结果表明

该方法能够将OCT图像的信噪比(SNR) 提高约30%

明显改善了图像质量。

Abstract

Data collected by CCD camera is a function of wavelength in Spectral-Domain Optical Coherence Tomography (SDOCT) system. By consideration of a wavelength-depended response characteristics of CCD and the Fourier transform relationship between time (distance) and frequency (wave-number)

the CCD data must be responsivity-compensated and resampled by linear interpolation in frequency space. Based on the above analysis

the CCD response compensation method and the linear interpolation arithmetic were suggested and tested by the sample imaging. Results show that signal-to-noise ratio (SNR) increases a 30% in proposed method and arithmetic mentioned above

and the OCT image quality is greatly improved.

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