1. Articles from Nobuyuki Shoji

    1-8 of 8
    1. Comparison of angle-to-angle distance using three devices in normal eyes

      Comparison of angle-to-angle distance using three devices in normal eyes

      Purpose To compare the angle-to-angle (ATA) distance, and the repeatability and the reproducibility of these measurements among the three devices. Methods We performed the ATA measurements in 26 healthy subjects using anterior segment optical coherence tomography (CASIA2, Tomey, Japan), the Scheimpflug camera (Pentacam HR, Oculus, Wetzlar, Germany), and the combined Placido-ring corneal topography and Scheimpflug camera (TMS-5, Tomey). We also compared the repeatability and the reproducibility of the ATA measurements among these three devices. Results The ATA in the CASIA2 group was significantly larger than that in the Pentacam group (Bonferroni test, p  = 0.002), or that in the TMS-5 ...

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    2. Comparison of angle-to-angle distance using three devices in normal eyes

      Comparison of angle-to-angle distance using three devices in normal eyes

      Purpose To compare the angle-to-angle (ATA) distance, and the repeatability and the reproducibility of these measurements among the three devices. Methods We performed the ATA measurements in 26 healthy subjects using anterior segment optical coherence tomography (CASIA2, Tomey, Japan), the Scheimpflug camera (Pentacam HR, Oculus, Wetzlar, Germany), and the combined Placido-ring corneal topography and Scheimpflug camera (TMS-5, Tomey). We also compared the repeatability and the reproducibility of the ATA measurements among these three devices. Results The ATA in the CASIA2 group was significantly larger than that in the Pentacam group (Bonferroni test, p  = 0.002), or that in the TMS-5 ...

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    3. Keratoconus detection using deep learning of colour-coded maps with anterior segment optical coherence tomography: a diagnostic accuracy study

      Keratoconus detection using deep learning of colour-coded maps with anterior segment optical coherence tomography: a diagnostic accuracy study

      Objective To evaluate the diagnostic accuracy of keratoconus using deep learning of the colour-coded maps measured with the swept-source anterior segment optical coherence tomography (AS-OCT). Design A diagnostic accuracy study. Setting A single-centre study. Participants A total of 304 keratoconic eyes (grade 1 (108 eyes), 2 (75 eyes), 3 (42 eyes) and 4 (79 eyes)) according to the Amsler-Krumeich classification, and 239 age-matched healthy eyes. Main outcome measures The diagnostic accuracy of keratoconus using deep learning of six colour-coded maps (anterior elevation, anterior curvature, posterior elevation, posterior curvature, total refractive power and pachymetry map). Results Deep learning of the arithmetical ...

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    4. Using Deep Learning and transform learning to accurately diagnose early-onset glaucoma from macular optical coherence tomography images

      Using Deep Learning and transform learning to accurately diagnose early-onset glaucoma from macular optical coherence tomography images

      Purpose To construct and evaluate a Deep Learning (DL) model to diagnose early glaucoma from spectral domain optical coherence tomography (SD-OCT) images. Design AI diagnostic tool development, evaluation, and comparison Methods Setting: multiple institutional practices. Study population Pre-training data consisted of 4316 OCT images (RS3000, Nidek) from 1565 eyes with open angle glaucoma (OAG) irrespective of the stage of glaucoma and 193 normal eyes. Training data included OCT-1000/2000 (Topcon) from 94 eyes of 94 early OAG patients (mean deviation: MD >-5.0 dB) and 84 eyes of 84 normal subjects. Testing data included OCT-1000/2000 from 114 eyes of ...

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    5. Influence of corneal power on circumpapillary retinal nerve fiber layer and optic nerve head measurements by spectral-domain optical coherence tomography

      Influence of corneal power on circumpapillary retinal nerve fiber layer and optic nerve head measurements by spectral-domain optical coherence tomography

      AIM : To evaluate the influence of corneal power on circumpapillary retinal nerve fiber layer (cpRNFL) and optic nerve head (ONH) measurements by spectral-domain optical coherence tomography (SD-OCT). METHODS : Twenty-five eyes of 25 healthy participants (mean age 23.6±3.6y) were imaged by SD-OCT using horizontal raster scans. Disposable soft contact lenses of different powers (from ?11 to +5 diopters including 0 diopter) were worn to induce 2-diopter changes in corneal power. Differences in the cpRNFL and ONH measurements per diopter of change in corneal power were analyzed. RESULTS : As corneal power increased by 1 diopter, total and quadrant cpRNFL ...

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    6. Validating the usefulness of the 'Random Forests’ classifier to diagnose early glaucoma with optical coherence tomography

      Validating the usefulness of the 'Random Forests’ classifier to diagnose early glaucoma with optical coherence tomography

      Purpose To validate the usefulness of the 'Random Forests’ classifier to diagnose early glaucoma with spectral domain optical coherence tomography (SD-OCT). Method Design: Comparison of diagnostic algorithms Setting: multiple institutional practice Study participants Training dataset included 94 eyes of 94 open angle glaucoma (OAG) patients and 84 eyes of 84 normal subjects and testing dataset included 114 eyes of 114 OAG patients and 82 eyes of 82 normal subjects. In both groups, OAG eyes with mean deviation (MD) values better than -5.0 dB were included. Observation Procedure Using the training dataset, classifiers were built to discriminate between glaucoma and ...

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    7. Comparative Kitasato-type optical coherence tomography study of differences in scleral shapes between the superonasal and superotemporal quadrants

      Comparative Kitasato-type optical coherence tomography study of differences in scleral shapes between the superonasal and superotemporal quadrants

      Objective: To determine differences in the scleral shape between the superonasal and superotemporal quadrants, which are the sites of scleral flap creation in trabeculectomy, using anterior-segment optical coherence tomography (OCT). Methods: Thirty-eight eyes of 22 subjects without ocular diseases except for cataract or ametropia were enrolled. The mean patient age was 63.8 ± 15.7 years (range, 28−80 years). The same examiner captured all images using Kitasato-type anterior-segment swept-source OCT. The mean measurements were calculated from the three images captured 60 degrees from the horizontal line passing through the pupillary center in the superonasal and superotemporal sclera. The radius ...

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    8. Comparative optical coherence tomography study of differences in scleral shape between the superonasal and superotemporal quadrants

      Comparative optical coherence tomography study of differences in scleral shape between the superonasal and superotemporal quadrants

      Purpose To determine the differences in scleral shape between the superonasal and superotemporal quadrants, the sites of scleral flap creation in trabeculectomy, using anterior segment optical coherence tomography (OCT). Methods Thirty-four right eyes of 34 enrolled subjects without ocular disease, with the exception of cataract or ametropia, were studied. Mean patient age was 63.2 ± 15.9 (standard deviation) years (range 28–84 years). The same examiner captured all images using anterior segment swept source OCT. The mean measurements were calculated from three images captured for each eye, 60° from the horizontal line passing through the pupillary center in the ...

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    1-8 of 8
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  2. Topics in the News

    1. (5 articles) Kitasato University
    2. (2 articles) University of Tokyo
    3. (2 articles) Makoto Araie
    4. (2 articles) Aiko Iwase
    5. (2 articles) Tomey Corporation
    6. (1 articles) University College London
    7. (1 articles) Jeffrey M. Liebmann
    8. (1 articles) Jikei University School of Medicine
    9. (1 articles) Macquarie University
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    11. (1 articles) University of Florence
    12. (1 articles) National Institutes of Health
    13. (1 articles) Beth Israel Deaconess Medical Center
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    Comparative optical coherence tomography study of differences in scleral shape between the superonasal and superotemporal quadrants Comparative Kitasato-type optical coherence tomography study of differences in scleral shapes between the superonasal and superotemporal quadrants Validating the usefulness of the 'Random Forests’ classifier to diagnose early glaucoma with optical coherence tomography Influence of corneal power on circumpapillary retinal nerve fiber layer and optic nerve head measurements by spectral-domain optical coherence tomography Using Deep Learning and transform learning to accurately diagnose early-onset glaucoma from macular optical coherence tomography images Keratoconus detection using deep learning of colour-coded maps with anterior segment optical coherence tomography: a diagnostic accuracy study Comparison of angle-to-angle distance using three devices in normal eyes Comparison of angle-to-angle distance using three devices in normal eyes Heterogeneity of Neointimal Healing Following Biodegradable-polymer Drug-Eluting Coronary Stent Implantation Swept-source and multimodal OCT technologies offer clinical advantages Early vascular response of ultra-thin bioresorbable polymer sirolimus-eluting stents assessed by optical frequency domain imaging: the EVALUATION study OCT, OCTA show promise in screening for DR