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Appl Phys Lett. 2013 Sep 2;103(10):103704. Epub 2013 Sep 6.

Resonant acoustic radiation force optical coherence elastography.

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1
Beckman Laser Institute, University of California Irvine, 1002 Health Sciences Road East, Irvine, California 92612, USA ; Department of Chemical Engineering and Materials Science, University of California Irvine, Irvine, California 92697, USA.

Abstract

We report on a resonant acoustic radiation force optical coherence elastography (ARF-OCE) technique that uses mechanical resonant frequency to characterize and identify tissues of different types. The linear dependency of the resonant frequency on the square root of Young's modulus was validated on silicone phantoms. Both the frequency response spectrum and the 3D imaging results from the agar phantoms with hard inclusions confirmed the feasibility of deploying the resonant frequency as a mechanical contrast for tissue imaging. Furthermore, the results of resonant ARF-OCE imaging of a post-mortem human coronary artery with atherosclerosis demonstrate the potential of the resonant ARF-OCE as a non-invasive method for imaging and characterizing vulnerable plaques.

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