Optical Coherence Microscopy for deep tissue imaging of the cerebral cortex with intrinsic contrast

Vivek Srinivasan, Harsha Radhakrishnan, James Y. Jiang, Scott Barry, Alex E. Cable

Research output: Contribution to journalArticle

108 Scopus citations

Abstract

In vivo optical microscopic imaging techniques have recently emerged as important tools for the study of neurobiological development and pathophysiology. In particular, two-photon microscopy has proved to be a robust and highly flexible method for in vivo imaging in highly scattering tissue. However, two-photon imaging typically requires extrinsic dyes or contrast agents, and imaging depths are limited to a few hundred microns. Here we demonstrate Optical Coherence Microscopy (OCM) for in vivo imaging of neuronal cell bodies and cortical myelination up to depths of ∼1.3 mm in the rat neocortex. Imaging does not require the administration of exogenous dyes or contrast agents, and is achieved through intrinsic scattering contrast and image processing alone. Furthermore, using OCM we demonstrate in vivo, quantitative measurements of optical properties (index of refraction and attenuation coefficient) in the cortex, and correlate these properties with laminar cellular architecture determined from the images. Lastly, we show that OCM enables direct visualization of cellular changes during cell depolarization and may therefore provide novel optical markers of cell viability.

Original languageEnglish (US)
Pages (from-to)2220-2239
Number of pages20
JournalOptics Express
Volume20
Issue number3
DOIs
StatePublished - Jan 30 2012
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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