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Micro-optical coherence tomography for high-resolution morphologic imaging of cellular and nerval corneal micro-structures

Andreas Wartak, Merle S. Schenk, Verena Bühler, Stefan A. Kassumeh, Reginald Birngruber, Guillermo J. Tearney*

*Corresponding author for this work

Abstract

We demonstrate the highest resolution (1.5×1.5×1 µm) micrometer optical coherence tomography (µOCT) imaging of the morphologic micro-structure of excised swine and nonhuman primate corneas. Besides epithelial, stromal, and endothelial cell morphology, this report focuses on investigating the most peripheral corneal nerve fibers, the nerve fibers of the subbasal plexus (SBP). Alterations of SBP nerve density and composition are reportedly linked to major neurologic disorders, such as diabetic neuropathy, potentially indicating earliest onsets of denervation. Here, the fine, hyperreflective, epithelial nerve structures located just above Bowman’s membrane, are i) visualized using our µOCT prototype, ii) validated by comparison to fluorescence confocal microscopy (including selective immunohistochemical staining), and iii) segmented using state-of-the-art image processing. Here, we also introduce polarization sensitive (PS) µOCT imaging, demonstrating, to the best of our knowledge, the highest resolution corneal PS-OCT scans reported to date.

Original languageEnglish
JournalBiomedical Optics Express
Volume11
Issue number10
Pages (from-to)5920-5933
Number of pages14
DOIs
Publication statusPublished - 30.09.2020

Funding

SPIE (A.W., Franz Hillenkamp Postdoctoral Fellowship); Deutsche Forschungsgemeinschaft (KA 5075/2-1); Hazard Family Foundation; John and Dottie Remondi Foundation. We thank Brian Battersby from the Computational Core of the Wellman Center for Photomedicine (WCP) for his help regarding data acquisition software development. We thank Jie Zhao and Jermaine Henderson from the Photopathology Core of the WPC for her help regarding FCM image acquisition. We thank Gabriela Apiou-Sbirlea from the Translational Research Core of the WCP and the Mass General Research Institute for support. We also would like to acknowledge the Hazard Family Foundation and the John and Dottie Remondi Foundation for their generous support of this work. G.J.T. has a financial/fiduciary interest in SpectraWave, a company developing an OCT-NIRS intracoronary imaging system and catheter. His financial/fiduciary interest was reviewed and is managed by the Massachusetts General Hospital and Partners HealthCare in accordance with their conflict of interest policies. G.J.T. also consults for SpectraWave and receives µOCT sponsored research funding from Vertex, CNUSA Biotech Holdings, Astra Zeneca, Translate Bio, and WayVector.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

Research Areas and Centers

  • Academic Focus: Biomedical Engineering

DFG Research Classification Scheme

  • 2.22-32 Medical Physics, Biomedical Technology

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