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Journal of Biomedical Optics

In vivo optical microscopy of peripheral nerve myelination with polarization sensitive-optical coherence tomography
Author(s): Francis P. Henry; Yan Wang; Carissa L. R. Rodriguez; Mark A. Randolph; Esther A. Z. Rust; Jonathan M. Winograd; Johannes F. de Boer; B. Hyle Park
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Paper Abstract

Assessing nerve integrity and myelination after injury is necessary to provide insight for treatment strategies aimed at restoring neuromuscular function. Currently, this is largely done with electrical analysis, which lacks direct quantitative information. In vivo optical imaging with sufficient imaging depth and resolution could be used to assess the nerve microarchitecture. In this study, we examine the use of polarization sensitive-optical coherence tomography (PS-OCT) to quantitatively assess the sciatic nerve microenvironment through measurements of birefringence after applying a nerve crush injury in a rat model. Initial loss of function and subsequent recovery were demonstrated by calculating the sciatic function index (SFI). We found that the PS-OCT phase retardation slope, which is proportional to birefringence, increased monotonically with the SFI. Additionally, histomorphometric analysis of the myelin thickness and g-ratio shows that the PS-OCT slope is a good indicator of myelin health and recovery after injury. These results demonstrate that PS-OCT is capable of providing nondestructive and quantitative assessment of nerve health after injury and shows promise for continued use both clinically and experimentally in neuroscience.

Paper Details

Date Published: 9 April 2015
PDF: 10 pages
J. Biomed. Opt. 20(4) 046002 doi: 10.1117/1.JBO.20.4.046002
Published in: Journal of Biomedical Optics Volume 20, Issue 4
Show Author Affiliations
Francis P. Henry, Massachusetts General Hospital Harvard Medical School (United States)
NHS (United States)
Yan Wang, Massachusetts General Hospital (United States)
Univ. of California, Riverside (United States)
Carissa L. R. Rodriguez, Univ. of California, Riverside (United States)
Mark A. Randolph, Harvard Medical School (United States)
Esther A. Z. Rust, Massachusetts General Hospital Harvard Medical School (United States)
Jonathan M. Winograd, Harvard Medical School (United States)
Johannes F. de Boer, Harvard Medical School (United States)
Vrije Univ. Amsterdam (Netherlands)
B. Hyle Park, Univ. of California, Riverside (United States)

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