Maximization of signal-to-noise ratio in optical coherence tomography using a depth-dependent matched filter

Ameneh Boroomand; Michael S. D. Smith; Dan P. Popescu; Michael Sowa; Sherif S. Sherif

doi:10.1117/12.2001691

24 October 2012 Maximization of signal-to-noise ratio in optical coherence tomography using a depth-dependent matched filter

Ameneh Boroomand, Michael S. D. Smith, Dan P. Popescu, Michael Sowa, Sherif S. Sherif

Author Affiliations +

Proceedings Volume 8412, Photonics North 2012; 841202 (2012) https://doi.org/10.1117/12.2001691
Event: Photonics North 2012, 2012, Montréal, Canada

Abstract

We discuss and demonstrate the dependence of noise on the signal in time-domain optical coherence tomography (TDOCT). We then derive a depth-dependent matched filter to maximize the signal-to-noise ratio at every pixel in a depth scan (A-scan). We use an empirical estimate of the second order statistics of the noise in OCT images of vascular tissue to implement a depth-dependent filter that is matched to these images. The application of our filter results in an average increase of signal-to-noise ratio of about 7 dB compared to a simple averaging operation. Our filter is not specific to time-domain OCT, but it is applicable to other types of OCT systems.

Citation Download Citation

Ameneh Boroomand, Michael S. D. Smith, Dan P. Popescu, Michael Sowa, and Sherif S. Sherif "Maximization of signal-to-noise ratio in optical coherence tomography using a depth-dependent matched filter", Proc. SPIE 8412, Photonics North 2012, 841202 (24 October 2012); https://doi.org/10.1117/12.2001691

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