Reproducibility of in-vivo OCT measured three-dimensional human lamina cribrosa microarchitecture

Bo Wang, Jessica E. Nevins, Zach Nadler, Gadi Wollstein, Hiroshi Ishikawa, Richard A. Bilonick, Larry Kagemann, Ian A. Sigal, Ireneusz Grulkowski, Jonathan J. Liu, Martin Kraus, Chen D. Lu, Joachim Hornegger, James G. Fujimoto, Joel S. Schuman

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    Abstract

    Purpose: To determine the reproducibility of automated segmentation of the three-dimensional (3D) lamina cribrosa (LC) microarchitecture scanned in-vivo using optical coherence tomography (OCT). Methods: Thirty-nine eyes (8 healthy, 19 glaucoma suspects and 12 glaucoma) from 49 subjects were scanned twice using swept-source (SS-) OCT in a 3.5x3.5x3.64 mm (400x400x896 pixels) volume centered on the optic nerve head, with the focus readjusted after each scan. The LC was automatically segmented and analyzed for microarchitectural parameters, including pore diameter, pore diameter standard deviation (SD), pore aspect ratio, pore area, beam thickness, beam thickness SD, and beam thickness to pore diameter ratio. Reproducibility of the parameters was assessed by computing the imprecision of the parameters between the scans. Results: The automated segmentation demonstrated excellent reproducibility. All LC microarchitecture parameters had an imprecision of less or equal to 4.2%. There was little variability in imprecision with respect to diagnostic category, although the method tends to show higher imprecision amongst healthy subjects. Conclusion: The proposed automated segmentation of the LC demonstrated high reproducibility for 3D LC parameters. This segmentation analysis tool will be useful for in-vivo studies of the LC.

    Original languageEnglish (US)
    Article numbere95526
    JournalPloS one
    Volume9
    Issue number4
    DOIs
    StatePublished - Apr 18 2014

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    ASJC Scopus subject areas

    • Biochemistry, Genetics and Molecular Biology(all)
    • Agricultural and Biological Sciences(all)
    • General

    Cite this

    Wang, B., Nevins, J. E., Nadler, Z., Wollstein, G., Ishikawa, H., Bilonick, R. A., Kagemann, L., Sigal, I. A., Grulkowski, I., Liu, J. J., Kraus, M., Lu, C. D., Hornegger, J., Fujimoto, J. G., & Schuman, J. S. (2014). Reproducibility of in-vivo OCT measured three-dimensional human lamina cribrosa microarchitecture. PloS one, 9(4), [e95526]. https://doi.org/10.1371/journal.pone.0095526