1. Chihiro Mayama

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    1. Mentioned In 8 Articles

    2. Discriminating between Glaucoma and Normal Eyes Using Optical Coherence Tomography and the ‘Random Forests’ Classifier

      Discriminating between Glaucoma and Normal Eyes Using Optical Coherence Tomography and the ‘Random Forests’ Classifier
      Purpose To diagnose glaucoma based on spectral domain optical coherence tomography (SD-OCT) measurements using the Random Forests method. Methods SD-OCT was conducted in 126 eyes of 126 open angle glaucoma (OAG) patients and 84 eyes of 84 normal subjects. The Random Forests method was then applied to discriminate between glaucoma and normal eyes using 151 OCT parameters including thickness measurements of circumpapillary retinal nerve fiber layer (cpRNFL), the macular RNFL ...
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    3. Cross-sectional study: Does combining optical coherence tomography measurements using the ‘Random Forest’ decision tree classifier improve the prediction of the presence of perimetric deterioration in glaucoma suspects

      Cross-sectional study: Does combining optical coherence tomography measurements using the ‘Random Forest’ decision tree classifier improve the prediction of the presence of perimetric deterioration in glaucoma suspects
      Objectives To develop a classifier to predict the presence of visual field (VF) deterioration in glaucoma suspects based on optical coherence tomography (OCT) measurements using the machine learning method known as the Random Forest algorithm. Design Casecontrol study. Participants 293 eyes of 179 participants with open angle glaucoma (OAG) or suspected OAG. Interventions Spectral domain OCT (Topcon 3D OCT-2000) and perimetry (Humphrey Field Analyser, 24-2 or 30-2 SITA standard) measurements ...
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    4. Iridotrabecular contact observed using anterior segment three-dimensional OCT in eyes with a shallow peripheral anterior chamber

      Iridotrabecular contact observed using anterior segment three-dimensional OCT in eyes with a shallow peripheral anterior chamber
      Purpose: To evaluate the prevalence and range of iridotrabecular contact (ITC) in eyes with a shallow peripheral anterior chamber (AC) by using anterior segment swept-source optical coherence tomography (AS-SS-OCT) and to compare the results with those obtained with ultrasound biomicroscopy (UBM) and gonioscopy. Methods: Forty-three shallow peripheral AC eyes in 43 consecutive patients underwent gonioscopy. Cross-sectional images throughout the angle circumference (i.e., 360 degrees) were obtained with AS-SS-OCT (SS-1000 ...
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    5. Circle and Grid-wise Analyses of Peripapillary Nerve Fiber Layers by Spectral Domain Optical Coherence Tomography in Early Stage Glaucoma

      Circle and Grid-wise Analyses of Peripapillary Nerve Fiber Layers by Spectral Domain Optical Coherence Tomography in Early Stage Glaucoma
      PURPOSE. To study diagnostic performances of circle and grid-wise analyses of peripapillary retinal nerve fiber layer thickness (RNFLT) using spectral domain optical coherence tomography (SD-OCT) in early stage glaucoma. METHODS. Eighty-nine open-angle glaucoma (OAG) eyes (mean deviation, -2.5 1.8 dB) and 89 age-matched normal eyes were studied. Peripapillary RNFLT was analyzed using SD-OCT raster scan in a 6.0 6.0 mm area. Averaged RNFLT was calculated over ...
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    6. Spectral-Domain Optical Coherence Tomography of β-zone Peripapillary Atrophy: Influence of Myopia and Glaucoma

      Spectral-Domain Optical Coherence Tomography of β-zone Peripapillary Atrophy: Influence of Myopia and Glaucoma
      Purpose: To investigate the influence of glaucoma and myopia on the cross-sectional configuration of β-zone peripapillary atrophy (PPA-β) using spectral-domain optical coherence tomography (SD-OCT). Methods: Among 100 eyes of 100 consecutive patients with POAG regardless of intraocular pressure level and 100 eyes of 100 normal subjects, cross-sectional B-scan images of PPA-β obtained with SD-OCT were evaluated. PPA bed configurations were classified and associated factors were studied with multivariate analysis. Results ...
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  2. About Chihiro Mayama

    Chihiro Mayama is in the Department of Ophthalmology at the University of Tokyo, Graduate School of Medicine in Japan.