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  • Segmentation of anterior segment boundaries in swept source OCT images

    Author(s)
    Garcia Marin, Y
    Skrok, M
    Siedlecki, D
    Vincent, SJ
    Collins, MJ
    Alonso-Caneiro, D
    Griffith University Author(s)
    Alonso-Caneiro, David
    Year published
    2021
    Metadata
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    Abstract
    Quantification of the eye's anterior segment morphology from optical coherence tomography (OCT) images is crucial for research and clinical decision-making, including the diagnosis and monitoring of many ocular diseases. Structural parameters, such as tissue thickness and area are the most common metrics used to quantify these medical images, and tissue segmentation is required before these metrics can be extracted. Currently, swept source OCT allows the capture of cross-sectional images that encompass the entire anterior segment with a high level of detail. However, the manual annotation of tissue boundaries is time-consuming. ...
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    Quantification of the eye's anterior segment morphology from optical coherence tomography (OCT) images is crucial for research and clinical decision-making, including the diagnosis and monitoring of many ocular diseases. Structural parameters, such as tissue thickness and area are the most common metrics used to quantify these medical images, and tissue segmentation is required before these metrics can be extracted. Currently, swept source OCT allows the capture of cross-sectional images that encompass the entire anterior segment with a high level of detail. However, the manual annotation of tissue boundaries is time-consuming. In this work, an algorithm based on graph-search theory combined with boundary-specific image transformation is applied for the segmentation of anterior segment OCT images. We demonstrate that the method can reliably segment 5 different tissue boundaries in healthy eyes with low boundary error (mean error below 1 pixel across all boundaries). The technique can be used to extract clinically relevant parameters such as central corneal and crystalline lens thickness as well as anterior chamber depth and area, with a high level of agreement with manual segmentation (normalized errors below 1.6%). The proposed method provides a tool that can support clinical and research OCT data analysis.
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    Journal Title
    Biocybernetics and Biomedical Engineering
    Volume
    41
    Issue
    3
    DOI
    https://doi.org/10.1016/j.bbe.2021.06.002
    Subject
    Biomedical engineering
    Publication URI
    http://hdl.handle.net/10072/412507
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    • Journal articles

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