摘要
为提高光学相干层析(OCT)系统的信噪比(SNR),改进系统的探测灵敏度,保证系统的成像质量,从理论上详细分析了光学相干层析成像系统中的主要噪声源,建立了系统噪声的理论模型,分析了光学相干层析成像系统中的各个组成单元对系统信噪比的影响.建立了一套实用型的光学相干层析成像系统,对该探测系统中的噪声进行了测量,得到系统噪声的实验模型.然后对理论分析的结果进行一定的修正,并对实验系统进行优化,得到了16μm的纵向分辨率,-90 dB的探测灵敏度.
In order to increase the signal-to-noise ratio （SNR） and improve the detection sensitivity of the optical coherence tomographic （OCT） system, the main noise sources in the OCT system are analyzed in detail. A theoretical noise model is then proposed which may be used to analyze the effect of different parts of OCT system. Based on the theoretical results, the performance of an OCT imaging system is analyzed. Through measuring the noise level of the system, the experimental model of the system noise is obtained, and then it is used to correct the theoretical analysis results. Based on the above analysis, the imaging performance of the OCT device is optimized. The axial resolution of 16 μm, and the detection sensitivity of -90 dB have been obtained.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2008年第4期635-640,共6页
Chinese Journal of Lasers
基金
江苏省六大人才项目基金(06-B-041)
江苏省高校青蓝工程基金
江苏省"333"工程基金
南京理工大学青年学者基金(Njust200302)
教育部留学回国人员基金
苏州大学重点实验室基金(KJS01002)资助课题
关键词
医用光学
光学相干层析
噪声分析
灵敏度
动态范围
信噪比
medical optics
optical coherence tomography
noise analysis
sensitivity
dynamic range
signal-tonoise ratio
