1. Articles from Kei Shinoda

    1-13 of 13
    1. OCT angiography measured changes in the foveal avascular zone area after glaucoma surgery

      OCT angiography measured changes in the foveal avascular zone area after glaucoma surgery

      Background/aims: To evaluate quantitative changes in the foveal avascular zone (FAZ) area after glaucoma surgery using swept-source optical coherence tomography angiography (SS-OCTA). Methods: Fifty-four consecutive patients with primary open-angle glaucoma (POAG) who met the inclusion criteria and underwent unilateral glaucoma surgery to reduce intraocular pressure (IOP) between April 2018 and July 2019.Eyes underwent IOP-lowering glaucoma surgery and their fellow (non-surgical) eyes were included. OCTA of the macula was performed in both eyes before glaucoma surgery and 3 months postoperatively. Two blinded examiners reviewed the image quality. Within- and between-group comparisons of the FAZ area and correlation of the ...

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    2. Glaucomatous vertical vessel density asymmetry of the temporal raphe detected with optical coherence tomography angiography

      Glaucomatous vertical vessel density asymmetry of the temporal raphe detected with optical coherence tomography angiography

      Changes in retinal vasculature and ocular circulation may play an important role in the glaucoma development and progression. We evaluated the vertical asymmetry across the temporal raphe of the deep retinal layer vessel density, using swept-source optical coherence tomography angiography (SS-OCTA), and its relationship with the central visual field (VF) loss. Thirty-four eyes of 27 patients with open-angle glaucoma were included. SS-OCTA macular scanning was performed within a 3 × 3 mm (300 × 300 pixels) volume, centred on the fovea. The relationships between the vertical asymmetrical deep retinal vessel density reduction (ADRVD) across the temporal raphe and various ocular parameters were ...

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    3. Association between axial length and in vivo human crystalline lens biometry during accommodation: a swept-source optical coherence tomography study

      Association between axial length and in vivo human crystalline lens biometry during accommodation: a swept-source optical coherence tomography study

      Purpose To evaluate the association between axial length and crystalline lens biometry with and without accommodation using the CASIA2 swept-source (SS) optical coherence tomography (OCT) system on the anterior segment. Study design Intervention study. Methods Individuals aged 20 to 39 years were enrolled for SS-OCT imaging at 2 separate visits within 1 week. Each eye was imaged under accommodation stimuli with different amplitudes (0 D, -1 D, -3 D, -5 D, and -7 D). The anterior and posterior lens curvature radii and lens thicknesses were measured. The participants were divided into 4 groups according to axial length. Results Forty-eight participants ...

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    4. Automated Measurement of the Foveal Avascular Zone in Swept-Source Optical Coherence Tomography Angiography Images

      Automated Measurement of the Foveal Avascular Zone in Swept-Source Optical Coherence Tomography Angiography Images

      Purpose : The purpose of this study was to evaluate automated measurement of the foveal avascular zone (FAZ) area using the Kanno-Saitama macro (KSM) software in Image J with swept-source optical coherence tomography angiography (SS-OCTA) images. Methods : In this cross-sectional study, one photographer scanned the macular area (3 × 3 mm) of healthy volunteers twice on the same day, at the same time. The FAZ area was measured from the en face image of the superficial retinal layer by two masked examiners, using the KSM and the Advanced Retina Imaging (ARI)-network method in Carl Zeiss online analysis. Intra- and interscan reproducibility ...

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    5. Reproducibility of Macular Vessel Density Calculations Via Imaging With Two Different Swept-Source Optical Coherence Tomography Angiography Systems

      Reproducibility of Macular Vessel Density Calculations Via Imaging With Two Different Swept-Source Optical Coherence Tomography Angiography Systems

      Purpose : To evaluate the reproducibility of vessel density calculations using different binarization methods obtained via two commercially available swept-source optical coherence tomography angiography (SS-OCTA) systems. Methods : Healthy volunteers were imaged using two swept-source optical coherence tomography angiography (SS-OCTA) devices, PLEXElite and Triton. SS-OCTA examinations were performed using a 3 × 3-mm volume scan pattern centered on the fovea. A total of six methods were used for binarization in ImageJ, two global thresholding and four local adaptive thresholding methods. Resultant vessel density values were compared between the instruments and binarization methods. Images for 60 eyes from 30 healthy subjects were assessed by ...

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    6. Evaluation of microvascular changes in the macular area of eyes with rhegmatogenous retinal detachment without macular involvement using swept-source optical coherence tomography angiography

      Evaluation of microvascular changes in the macular area of eyes with rhegmatogenous retinal detachment without macular involvement using swept-source optical coherence tomography angiography

      Purpose: To evaluate microvascular changes in the macular area of eyes with rhegmatogenous retinal detachment (RRD) without macular involvement (macula-on RRD) using swept-source optical coherence tomography angiography (SS-OCTA). Patients and methods: Five patients with macula-on RRD were eligible for analysis. All patients underwent SS-OCTA examination (Triton) for the macular area. The healthy fellow eyes were included as controls. The vessel density (VD) was calculated using binarization, and the foveal avascular zone (FAZ) was measured. The VD and FAZ area were compared between the eyes with RRD and the fellow eyes using the Wilcoxon signed rank test. Results: The patients’ clinical ...

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    7. Optic disc vessel density in nonglaucomatous and glaucomatous eyes: an enhanced-depth imaging optical coherence tomography angiography study

      Optic disc vessel density in nonglaucomatous and glaucomatous eyes: an enhanced-depth imaging optical coherence tomography angiography study

      Purpose: To evaluate the ability of enhanced-depth imaging (EDI) optical coherence tomography angiography (OCTA) to detect vascular signals inside the glaucomatous optic disc. Patients and methods: Ten glaucomatous eyes of 8 subjects and 11 nonglaucomatous eyes of 7 subjects underwent EDI and conventional OCTA for optic disc analysis. The optic disc vessel density (VD) at maximum scan depth (2 mm) was compared between the 2 methods and between glaucomatous and nonglaucomatous eyes. Regression analysis was used to determine the factors affecting disc VD. Results: The median (25th, 75th percentile) of the visual field mean deviation was –20.5 (–25.1 ...

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      Mentions: Masanori Hangai
    8. In vivo crystalline lens measurements with novel swept-source optical coherent tomography: an investigation on variability of measurement

      In vivo crystalline lens measurements with novel swept-source optical coherent tomography: an investigation on variability of measurement

      Objective To evaluate the reproducibility of in vivo crystalline lens measurements obtained by novel commercially available swept-source (SS) optical coherence tomography (OCT) specifically designed for anterior segment imaging. Methods and analysis One eye from each of 30 healthy subjects was randomly selected using the CASIA2 (Tomey, Nagoya, Japan) in two separate visits within a week. Each eye was imaged twice. After image scanning, the anterior and posterior lens curvatures and lens thickness were calculated automatically by the CASIA2 built-in program at 0 dioptre (D) (static), −1 D, −3 D and −5 D accommodative stress. The intraobserver and intervisit reproducibility coefficient ...

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    9. Wavy and elevated retinal pigment epithelial line in optical coherence tomographic images of eyes with atypical Vogt-Koyanagi-Harada disease

      Wavy and elevated retinal pigment epithelial line in optical coherence tomographic images of eyes with atypical Vogt-Koyanagi-Harada disease

      Purpose We report the changes of the retinal pigment epithelium (RPE) determined by optical coherence tomography in a patient with atypical Vogt–Koyanagi–Harada (VKH) disease during the recovery phase. Method Case presentation. Results A 74-year-old woman presented with a central scotoma associated with disc hyperemia, serous retinal detachment, and scleral thickening in her left eye, and was diagnosed with VKH. OCT showed a serous retinal detachment and a wavy RPE contour that corresponded to the choroidal folds. The OCT images clearly showed the dynamic changes of the retina, RPE, and choroid during the recovery phase. Conclusions The OCT was ...

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    10. Optical coherence tomographic evaluation of the outer retinal architecture in Oguchi disease

      Background To report the changes in the optical coherence tomography (OCT) images of the outer retinal layers after prolonged dark adaptation in a patient with Oguchi disease. Case A 75-year-old woman showed the typical golden-yellow fundus reflex of Oguchi disease, and the coloration returned to normal after prolonged dark adaptation. Fourier domain OCT (FD-OCT) was performed on the patient’s left eye before and after prolonged dark adaptation. Observations Before dark adaptation, the FD-OCT images at the fovea had three identifiable reflection bands, namely, the external limiting membrane (ELM), the border between the photoreceptor inner and outer segments (IS/OS ...
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    11. Assessment of the posterior segment of the cat eye by optical coherence tomography (oct)

      Objectives To assess the feasibility of optical coherence tomography (OCT) for examining the cat ocular fundus, to provide normative data on retinal thickness in different fundus regions, and to demonstrate selected surgically induced vitreoretinal pathologies in the cat. Animal studied Forty-five eyes of 28 healthy domestic cats and two eyes of domestic cats that had undergone subretinal implantation surgery for a visual prosthesis were examined. Procedures An optical coherence tomograph (Zeiss-Humphrey) was used to examine the anesthetized animals. At least five vertical and five horizontal scans in regular distribution were recorded for each cat including (1) the peripapillary region, (2 ...
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    1-13 of 13
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  2. Topics in the News

    1. (3 articles) University of Washington
    2. (2 articles) UCSD
    3. (2 articles) Robert N. Weinreb
    4. (2 articles) Carl Zeiss Meditec
    5. (2 articles) Ruikang K. Wang
    6. (1 articles) Masanori Hangai
    7. (1 articles) Makoto Araie
    8. (1 articles) Topcon Medical Systems
    9. (1 articles) Tomey Corporation
    10. (1 articles) Zhejiang University
    11. (1 articles) Cleveland Clinic
    12. (1 articles) UCSD
    13. (1 articles) Sunil K. Srivastava
    14. (1 articles) Justis P. Ehlers
    15. (1 articles) William R. Freeman
    16. (1 articles) Peng Li
    17. (1 articles) Optovue
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    Wavy and elevated retinal pigment epithelial line in optical coherence tomographic images of eyes with atypical Vogt-Koyanagi-Harada disease In vivo crystalline lens measurements with novel swept-source optical coherent tomography: an investigation on variability of measurement Optic disc vessel density in nonglaucomatous and glaucomatous eyes: an enhanced-depth imaging optical coherence tomography angiography study Evaluation of microvascular changes in the macular area of eyes with rhegmatogenous retinal detachment without macular involvement using swept-source optical coherence tomography angiography Reproducibility of Macular Vessel Density Calculations Via Imaging With Two Different Swept-Source Optical Coherence Tomography Angiography Systems Automated Measurement of the Foveal Avascular Zone in Swept-Source Optical Coherence Tomography Angiography Images Impact of cardiometabolic factors on retinal vasculature: A 3x3, 6x6 and 8x8-mm optical coherence tomography angiography study Quantitative research on the interaction between cerebral edema and peripheral cerebral blood perfusion using swept-source optical coherence tomography Optical coherence tomography angiography measures blood pulsatile waveforms at variable tissue depths Optical coherence tomography angiography distortion correction in widefield montage images Multilayered retinal pigment epithelial detachment: an optical coherence tomography angiography perspective Association of Spectral-Domain OCT With Long-term Disability Worsening in Multiple Sclerosis