Research Papers: Imaging

Improvements in speckle tracking algorithms for vibrational analysis using optical coherence tomography

[+] Author Affiliations
Prashanth Raghavendra Prasad, Shanti Bhattacharya

Indian Institute of Technology Madras, Department of Electrical Engineering, Chennai, India

J. Biomed. Opt. 18(4), 046007 (Apr 08, 2013). doi:10.1117/1.JBO.18.4.046007
History: Received May 16, 2012; Revised March 11, 2013; Accepted March 14, 2013
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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.

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© 2013 Society of Photo-Optical Instrumentation Engineers

Citation

Prashanth Raghavendra Prasad and Shanti Bhattacharya
"Improvements in speckle tracking algorithms for vibrational analysis using optical coherence tomography", J. Biomed. Opt. 18(4), 046007 (Apr 08, 2013). ; http://dx.doi.org/10.1117/1.JBO.18.4.046007


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