Measurement of retinal nerve fiber layer thickness with a deep learning algorithm in ischemic optic neuropathy and optic neuritis.

Journal: Scientific reports
Published Date: Oct 12, 2022

Abstract

This work aims at determining the ability of a deep learning (DL) algorithm to measure retinal nerve fiber layer (RNFL) thickness from optical coherence tomography (OCT) scans in anterior ischemic optic neuropathy (NAION) and demyelinating optic neuritis (ON). The training/validation dataset included 750 RNFL OCT B-scans. Performance of our algorithm was evaluated on 194 OCT B-scans from 70 healthy eyes, 82 scans from 28 NAION eyes, and 84 scans of 29 ON eyes. Results were compared to manual segmentation as a ground-truth and to RNFL calculations from the built-in instrument software. The Dice coefficient for the test images was 0.87. The mean average RNFL thickness using our U-Net was not different from the manually segmented best estimate and OCT machine data in control and ON eyes. In NAION eyes, while the mean average RNFL thickness using our U-Net algorithm was not different from the manual segmented value, the OCT machine data were different from the manual segmented values. In NAION eyes, the MAE of the average RNFL thickness was 1.18 ± 0.69 μm and 6.65 ± 5.37 μm in the U-Net algorithm segmentation and the conventional OCT machine data, respectively (P = 0.0001).

Authors

  • Ghazale Razaghi
    Medical Image Research Center, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
  • Ehsan Hedayati
    Farabi Eye Hospital, Tehran University of Medical Sciences, Qazvin Sq, Tehran, 13138, Iran.
  • Marjaneh Hejazi
    Medical Image Research Center, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
  • Rahele Kafieh
    Medical Image and Signal Processing Research Center, Isfahan University of Medical Sciences, Iran. Electronic address: rkafieh@amt.mui.ac.ir.
  • Melika Samadi
    Farabi Eye Hospital, Tehran University of Medical Sciences, Qazvin Sq, Tehran, 13138, Iran.
  • Robert Ritch
    Einhorn Clinical Research Center, New York Eye and Ear Infirmary of Mount Sinai, New York, New York.
  • Prem S Subramanian
  • Masoud Aghsaei Fard
    From the Singapore National Eye Center (D.M., D.T., S.S., C.-Y.C., T.Y.W.), Singapore Eye Research Institute (D.M., R.P.N., D.T., C.V., S.S., C.-Y.C., T.Y.W.), Duke-NUS Medical School (D.M., R.P.N., D.T., S.S., C.-Y.C., T.Y.W.), Institute of High Performance Computing, Agency for Science, Technology, and Research (J.Z., X.X., Y.L.), and Yong Loo Lin School of Medicine, National University of Singapore (S.S., T.Y.W.) - all in Singapore; Farabi Eye Hospital, Tehran University of Medical Science, Tehran, Iran (M.A.F.); the Department of Ophthalmology, Centro Hospitalar e Universitário de Coimbra, and the Coimbra Institute for Biomedical Imaging and Translational Research, University of Coimbra, Coimbra, Portugal (P.F.); the Department of Ophthalmology, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (K.V.); the Eye Center, Medical Center, University of Freiburg, Freiburg (W.A.L.), and the Department of Ophthalmology, Ruprecht Karl University of Heidelberg, Mannheim (J.B.J.) - both in Germany; IRCCS Istituto delle Scienze Neurologiche di Bologna, Unità Operativa Complessa Clinica Neurologica, and Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Bologna, Italy (C.L.M.); the Department of Ophthalmology and Visual Sciences, Chinese University of Hong Kong, Hong Kong (C.Y.C.), and Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou (H.Y.) - both in China; the Department of Ophthalmology, Rigshospitalet, University of Copenhagen, Glostrup, Denmark (S.H.); the Department of Ophthalmology, University Hospital of Grenoble-Alpes, and Grenoble-Alpes University, HP2 Laboratory, INSERM Unité 1042, Grenoble (C.C.), Service d'Ophtalmologie, Unité Rétine-Uvéites-Neuro-Ophtalmologie, Hôpital Pellegrin, Centre Hospitalier Universitaire de Bordeaux, Bordeaux (M.-B.R.), the Department of Ophthalmology, Lille Catholic Hospital, Lille Catholic University, and INSERM Unité 1171, Lille (T.T.H.C.), the Department of Ophthalmology, University Hospital Angers, Angers (P.G.), and Rothschild Foundation Hospital, Paris (C.C.-V.) - all in France; the Department of Clinical Neurosciences, Geneva University Hospital, Geneva (N.S.); the Department of Neurology, SUNY Upstate Medical University, Syracuse, NY (L.J.M.); the American Eye Center, Mandaluyong City, Philippines (R.K.); Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, University College London, London (P.Y.-W.-M.), and Cambridge Eye Unit, Addenbrooke's Hospital, Cambridge University Hospitals, and Cambridge Centre for Brain Repair and Medical Research Council Mitochondrial Biology Unit, Department of Clinical Neurosciences, University of Cambridge, Cambridge (P.Y.-W.-M.) - all in the United Kingdom; the Save Sight Institute, Faculty of Health and Medicine, University of Sydney, Sydney (C.L.F.); the Department of Ophthalmology and Neurology, Mayo Clinic, Rochester, MN (J.J.C.); the Department of Neuro-ophthalmology, Sankara Nethralaya, Medical Research Foundation, Chennai, India (S.A.); the Departments of Ophthalmology, Neurology, and Neurosurgery, Johns Hopkins University School of Medicine, Baltimore (N.R.M.); and the Departments of Ophthalmology and Neurology, Emory University School of Medicine, Atlanta (N.J.N., V.B.).

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