Research Papers

Speckle reduction in optical coherence tomography by “path length encoded” angular compounding

[+] Author Affiliations
N. Iftimia, B. E. Bouma

Harvard Medical School and the Wellman Laboratories of Photomedicine, Massachusetts General Hospital, 50 Blossom Street, BAR 703, Boston, Massachusetts?02114

G. J. Tearney

Harvard Medical School and the Wellman Laboratories of Photomedicine, Massachusetts General Hospital, Department of Pathology, 50 Blossom Street, BAR 703, Boston, Massachusetts?02114 E-mail: tearney@helix.mgh.harvard.edu

J. Biomed. Opt. 8(2), 260-263 (Apr 01, 2003). doi:10.1117/1.1559060
History: Received Jul. 8, 2002; Revised Oct. 7, 2002; Accepted Oct. 7, 2002; Online April 01, 2003
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Speckle, the dominant factor reducing image quality in optical coherence tomography (OCT), limits the ability to identify cellular structures that are essential for diagnosis of a variety of diseases. We describe a new high-speed method for implementing angular compounding by path length encoding (ACPE) for reducing speckle in OCT images. By averaging images obtained at different incident angles, with each image encoded by path length, ACPE maintains high-speed image acquisition and requires minimal modifications to OCT probe optics. ACPE images obtained from tissue phantoms and human skin in vivo demonstrate a qualitative improvement over traditional OCT and an increased SNR that correlates well with theory. © 2003 Society of Photo-Optical Instrumentation Engineers.

© 2003 Society of Photo-Optical Instrumentation Engineers

Citation

N. Iftimia ; B. E. Bouma and G. J. Tearney
"Speckle reduction in optical coherence tomography by “path length encoded” angular compounding", J. Biomed. Opt. 8(2), 260-263 (Apr 01, 2003). ; http://dx.doi.org/10.1117/1.1559060


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