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Proceedings Paper

A preliminary study on using reverberant shear wave fields in optical coherence elastography to examine mice brain ex vivo
Author(s): Gary R. Ge; Fernando Zvietcovich; Jannick P. Rolland; Humberto Mestre; Michael Giannetto; Maiken Nedergaard; Kevin J. Parker
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Paper Abstract

A number of approaches employ optical coherence tomography (OCT) to obtain the mechanical properties of biological tissue. These are generally referred to as optical coherence elastography (OCE), and have demonstrated promising applications with studies in cornea, breast, muscle, skin, and other soft tissues. A particular application of interest is the brain, in which changes in local and global elastic properties may correlate with the onset and progression of degenerative brain diseases. In this preliminary study, mice brains are studied ex vivo and in situ with preservation of the brain/skull anatomical architecture. A small 6 mm diameter portion of the skull is replaced with a glass cap to allow for OCT imaging. Various permutations of source placement for generating shear waves and modes of excitation are evaluated to optimize the experimental setup. The use of reverberant shear wave fields, which takes advantage of inevitable reflections from boundaries and tissue inhomogeneities, allow for estimation of the shear wave speed, which is directly related to the elastic modulus of soft tissues. Preliminary estimates for the shear wave speed in brains of recently deceased mice are obtained. This study demonstrates potential applications in brain OCE ex vivo and in vivo.

Paper Details

Date Published: 21 February 2019
PDF: 7 pages
Proc. SPIE 10880, Optical Elastography and Tissue Biomechanics VI, 108801D (21 February 2019); doi: 10.1117/12.2516039
Show Author Affiliations
Gary R. Ge, The Institute of Optics, Univ. of Rochester (United States)
Fernando Zvietcovich, Univ. of Rochester (United States)
Jannick P. Rolland, The Institute of Optics, Univ. of Rochester (United States)
Humberto Mestre, Univ. of Rochester (United States)
Michael Giannetto, Univ. of Rochester (United States)
Maiken Nedergaard, Univ. of Rochester (United States)
Kevin J. Parker, Univ. of Rochester (United States)

Published in SPIE Proceedings Vol. 10880:
Optical Elastography and Tissue Biomechanics VI
Kirill V. Larin; Giuliano Scarcelli, Editor(s)

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