Speckle reduction in optical coherence tomography images using digital filtering
JOSA A, Vol. 24, Issue 7, pp. 1901-1910 (2007)
http://dx.doi.org/10.1364/JOSAA.24.001901
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Abstract
Speckle noise is a ubiquitous artifact that limits the interpretation of optical coherence tomography images. Here we apply various speckle-reduction digital filters to optical coherence tomography images and compare their performance. Our results indicate that shift-invariant, nonorthogonal wavelet-transform-based filters together with enhanced Lee and adaptive Wiener filters can significantly reduce speckle and increase the signal-to-noise ratio, while preserving strong edges. The speckle reduction capabilities of these filters are also compared with speckle reduction from incoherent angular compounding. Our results suggest that by using these digital filters, the number of individual angles required to attain a certain level of speckle reduction can be decreased.
© 2007 Optical Society of America
OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(110.4500) Imaging systems : Optical coherence tomography
ToC Category:
Imaging Systems
History
Original Manuscript: November 1, 2006
Revised Manuscript: January 8, 2007
Manuscript Accepted: January 29, 2007
Published: June 13, 2007
Virtual Issues
Vol. 2, Iss. 8 Virtual Journal for Biomedical Optics
Citation
Aydogan Ozcan, Alberto Bilenca, Adrien E. Desjardins, Brett E. Bouma, and Guillermo J. Tearney, "Speckle reduction in optical coherence tomography images using digital filtering," J. Opt. Soc. Am. A 24, 1901-1910 (2007)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-24-7-1901
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