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Proceedings Paper

Freehand OCT with real-time lateral motion tracking
Author(s): Xuan Liu; Yong Huang; Peter Gehlbach; Jin U. Kang
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Paper Abstract

Freehand optical coherence tomography (OCT) systems without mechanical scanners can offer greater freedom to access and image sites of interest. However, the scanning velocity during freehand scan is irregular; therefore pseudo B-scan images obtained by stacking sequentially acquired A-scans have a non-uniform spatial sampling rate in the lateral dimension. In this study, we developed a speckle decorrelation method to estimate lateral displacement between sequentially acquired A-scans and used the information extracted from speckle analysis to correct the time-varying lateral scanning speed. We applied this method to a handheld OCT probe and performed calibration experiments to validate our model. Furthermore we demonstrated distortion-free, freehand OCT imaging of various samples including human tissue, in vivo.

Paper Details

Date Published: 20 March 2013
PDF: 6 pages
Proc. SPIE 8571, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII, 85711P (20 March 2013); doi: 10.1117/12.2006973
Show Author Affiliations
Xuan Liu, Johns Hopkins Univ. (United States)
Yong Huang, Johns Hopkins Univ. (United States)
Peter Gehlbach, Johns Hopkins School of Medicine (United States)
Jin U. Kang, Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 8571:
Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII
James G. Fujimoto; Joseph A. Izatt; Valery V. Tuchin, Editor(s)

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