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Journal of Biomedical Optics

Improvements in speckle tracking algorithms for vibrational analysis using optical coherence tomography
Author(s): Prashanth Raghavendra Prasad; Shanti Bhattacharya
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Paper Abstract

We report on improvements in speckle tracking algorithms for analyzing subsurface vibrations using an optical coherence tomography system. Our technique uses axial deconvolution and linear interpolation of depth scans before using cross-correlation-based speckle tracking. We applied this method on M-mode images of a test sample and on wrist pulses to perform depth-resolved measurements of displacement, velocity, and frequencies of vibrations. Speckle pattern displacements and features spanning 0.5 pixels were tracked clearly. Extension of this technique to two dimensions can provide improved performance in the field of optical coherence elastography.

Paper Details

Date Published: 8 April 2013
PDF: 10 pages
J. Biomed. Opt. 18(4) 046007 doi: 10.1117/1.JBO.18.4.046007
Published in: Journal of Biomedical Optics Volume 18, Issue 4
Show Author Affiliations
Prashanth Raghavendra Prasad, Indian Institute of Technology Madras (India)
Shanti Bhattacharya, Indian Institute of Technology Madras (India)

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