Combined correlation estimation of axial displacement in optical coherence elastography: assessment of axial displacement sensitivity performance relative to existing methods

A. Grimwood; A. Messa; J. C. Bamber

doi:10.1117/12.2079315

6 March 2015 Combined correlation estimation of axial displacement in optical coherence elastography: assessment of axial displacement sensitivity performance relative to existing methods

A. Grimwood, A. Messa, J. C. Bamber

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Proceedings Volume 9327, Optical Elastography and Tissue Biomechanics II; 93270W (2015) https://doi.org/10.1117/12.2079315
Event: SPIE BiOS, 2015, San Francisco, California, United States

Abstract

A combined correlation method is introduced to optical coherence elastography for axial displacement estimation. Its performance is compared with that of amplitude correlation tracking and phase shift estimation. Relative sensitivities to small (sub-micron), and large (pixel-scale) axial displacements are analysed for a Perspex test object and gelatine phantom.

The combined correlation method exhibited good overall performance, with a larger dynamic range than phase shift estimation and higher sensitivity than amplitude correlation tracking.

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A. Grimwood, A. Messa, and J. C. Bamber "Combined correlation estimation of axial displacement in optical coherence elastography: assessment of axial displacement sensitivity performance relative to existing methods", Proc. SPIE 9327, Optical Elastography and Tissue Biomechanics II, 93270W (6 March 2015); https://doi.org/10.1117/12.2079315

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KEYWORDS

Current controlled current source

Phase shifts

Optical coherence tomography

Elastography

Coherence (optics)

Signal to noise ratio

Correlation function

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