2 October 2003 Speckle statistics in optical coherence tomography and speckle reduction by frequency compounding
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Abstract
In this paper we are investigating the possibility of a frequency compounding method for speckle reduction in optical coherence tomography. The method is based on incoherent summation of the magnitudes of two independent interferometric signals, which were recorded at two different center wavelengths simultaneously. We derive the corresponding speckle statistics for amplitude based OCT signals recorded with single and dual frequency sources and compare the theoretical results with measurements obtained in a uniformly scattering sample. Finally we demonstrate our method by comparing images of human skin recorded in vivo with and without frequency compounding. The compounding method results in an increased contrast and improved image quality without loss of resolution.
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Michael Pircher, Erich Goetzinger, Rainer Leitgeb, Adolf Friedrich Fercher, Christoph K. Hitzenberger, "Speckle statistics in optical coherence tomography and speckle reduction by frequency compounding", Proc. SPIE 5140, Optical Coherence Tomography and Coherence Techniques, (2 October 2003); doi: 10.1117/12.500602; https://doi.org/10.1117/12.500602
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