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Towards multi-directional OCT for speckle noise reduction.

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  • 1Institute for Robotics and Cognitive Systems, University of Luebeck, Germany. ramrath@rob.uni-luebeck.de

Abstract

Multi-directional optical coherence tomography (MD-OCT) applies and extends the concept of angular compounding for speckle noise reduction to the area of OCT imaging. OCT images are acquired from a wide range of angles of view. Averaging of the rotated images therefore requires compensation of the parallax which is achieved by simple image registration for image reconstruction. Test measurements of a sample structure in a low and highly scattering environment show that the method improves the signal-to-noise ratio by a factor of 4 and hence reduces speckle noise significantly. Experimental results also show that the proposed averaging increases the performance of common edge-detection algorithms.

PMID:
18979821
[PubMed - indexed for MEDLINE]
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