Analyses and calculations of noise in optical coherence tomography systems |
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Authors: | Xiaonong ZHU Yanmei LIANG Youxin MAO Yaqing JIA Yiheng LIU Guoguang MU |
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Affiliation: | 1. Institute of Modern Optics, Nankai University, Key Laboratory of Opto-electronic Information Science and Technology, Ministry of Education, Tianjin 300071, China 2. Institute for Microstructural Science, National Research Council Canada, Ottawa, ON, K1A 0R6, Canada |
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Abstract: | Significant progress has been made in the study of optical coherence tomography (OCT) - a non-invasive, high resolution, and in vivo diagnostic method for medical imaging applications. In this paper, the principles of noise analyses for OCT systems have been described. Comparisons are made of signal-to-noise ratios for both balanced and unbalanced detection schemes under the ideal no-stray light situation as well as the non-ideal situation where residual reflections and scatterings are presented. Numerical examples of noise calculation accompanied by detailed comparison of the main characteristics of both time-domain and frequency-domain OCT systems are also presented. It is shown that a larger dynamic range can be achieved for a Fourier-domain OCT system even under the circumstances of high-speed image acquisition. The main results presented in this paper should be useful for the development of high performance OCT systems. |
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Keywords: | optical coherence tomography (OCT) noise analyses sensitivity signal-to-noise ratio (SNR) |
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