1. Articles from Xin Wei

    1-5 of 5
    1. Comparison of Choroidal Vascularity Markers on Optical Coherence Tomography Using Two-Image Binarization Techniques

      Comparison of Choroidal Vascularity Markers on Optical Coherence Tomography Using Two-Image Binarization Techniques

      Purpose : To compare the agreement between optical coherence tomography (OCT)-based choroidal vascularity markers measured by two previously reported image binarization techniques. Methods : Spectral-domain OCT using enhanced-depth imaging was performed in 100 eyes from 52 normal subjects. Choroidal images were binarized to luminal area and stromal area using two different algorithms. Choroidal vascularity marker was defined as the ratio of luminal area to total choroidal area and they were termed “luminal/choroidal area ratio (L/C ratio)” and “choroidal vascularity index (CVI)” per the algorithm. The agreement between choroidal vascularity markers measured by the two techniques was compared using intraclass ...

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      Mentions: Taiji Sakamoto
    2. A Novel Optical Coherence Tomography Based Parameter in Patients With Exudative Age-Related Macular Degeneration

      A Novel Optical Coherence Tomography Based Parameter in Patients With Exudative Age-Related Macular Degeneration

      Purpose: To evaluate choroidal structural changes in exudative age-related macular degeneration (AMD) using choroidal vascularity index computed from image binarization on spectral domain optical coherence tomography with enhanced depth imaging. Methods: This prospective case series included 42 consecutive patients with unilateral exudative AMD. Choroidal images were segmented into luminal area and stromal area. Choroidal vascularity index was defined as the ratio of luminal area to total choroid area. Mean choroidal vascularity index and mean choroidal thickness between study and fellow eyes of the same patient with dry AMD were compared using Student's t -test. Results: There was a significantly ...

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    3. Influence of scanning area on choroidal vascularity index measurement using optical coherence tomography

      Influence of scanning area on choroidal vascularity index measurement using optical coherence tomography

      Purpose Recently, choroidal vascularity index (CVI) is proposed as a novel tool to evaluate the choroidal vasculature. In this study, we investigate the impact of scanning area on CVI measurement using spectral-domain optical coherence tomography (SD-OCT). Methods Spectral-domain optical coherence tomography (SD-OCT) using enhanced depth imaging mode was performed in 30 eyes from 15 normal subjects. Three scanning areas were compared: dingle foveal scan; central macular scans [scan passing through central 1000 microns circle on Early Treatment Diabetic Retinopathy Study (ETDRS) grid, inner circle]; and total macular cube scans. Binarization of OCT B-scans and segmentation of the binarized choroid layer ...

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    4. CHOROIDAL VASCULARITY INDEX: A Novel Optical Coherence Tomography Based Parameter in Patients With Exudative Age-Related Macular Degeneration

      CHOROIDAL VASCULARITY INDEX: A Novel Optical Coherence Tomography Based Parameter in Patients With Exudative Age-Related Macular Degeneration

      Purpose: To evaluate choroidal structural changes in exudative age-related macular degeneration (AMD) using choroidal vascularity index computed from image binarization on spectral domain optical coherence tomography with enhanced depth imaging. Methods: This prospective case series included 42 consecutive patients with unilateral exudative AMD. Choroidal images were segmented into luminal area and stromal area. Choroidal vascularity index was defined as the ratio of luminal area to total choroid area. Mean choroidal vascularity index and mean choroidal thickness between study and fellow eyes of the same patient with dry AMD were compared using Student's t-test. Results: There was a significantly lower ...

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    5. Lamina Cribrosa Visibility using Optical Coherence Tomography: Comparison of Devices and Effects of Image Enhancement Techniques

      Lamina Cribrosa Visibility using Optical Coherence Tomography: Comparison of Devices and Effects of Image Enhancement Techniques

      Purpose: To compare the visibility of the lamina cribrosa (LC) in optic disc images acquired from 60 glaucoma and 60 control subjects using three optical coherence tomography (OCT) devices, with and without enhanced depth imaging (EDI) and adaptive compensation (AC). Methods: A horizontal B-scan was acquired through the centre of the disc using two spectral-domain (Spectralis and Cirrus; with and without EDI) and a swept-source (DRI) OCT. AC was applied post-acquisition to improve image quality. To assess LC visibility, four masked observers graded the 1,200 images in a randomised sequence. The anterior LC was graded from 0 to 4 ...

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    1-5 of 5
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  2. Topics in the News

    1. (1 articles) National University of Singapore
    2. (1 articles) Singapore Eye Research Institute
    3. (1 articles) University College London
    4. (1 articles) Tin Aung
    5. (1 articles) Mani Baskaran
    6. (1 articles) Taiji Sakamoto
    7. (1 articles) Michaël J. A. Girard
    8. (1 articles) Heidelberg Spectralis
    9. (1 articles) Zeiss Cirrus HD-OCT
    10. (1 articles) Boston University
    11. (1 articles) Stanford University
    12. (1 articles) Hong Kong Polytechnic University
    13. (1 articles) University Hospital Zurich
    14. (1 articles) University of British Columbia
    15. (1 articles) University of Zurich
    16. (1 articles) Duke University
    17. (1 articles) University of São Paulo
    18. (1 articles) Cleveland Clinic
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    Lamina Cribrosa Visibility using Optical Coherence Tomography: Comparison of Devices and Effects of Image Enhancement Techniques CHOROIDAL VASCULARITY INDEX: A Novel Optical Coherence Tomography Based Parameter in Patients With Exudative Age-Related Macular Degeneration Influence of scanning area on choroidal vascularity index measurement using optical coherence tomography A Novel Optical Coherence Tomography Based Parameter in Patients With Exudative Age-Related Macular Degeneration Comparison of Choroidal Vascularity Markers on Optical Coherence Tomography Using Two-Image Binarization Techniques Special Section Guest Editorial: Advances in Retinal Imaging Optical coherence tomography angiography-derived flow density: a review of the influencing factors Changes in retinal and choriocapillaris density in diabetic patients receiving anti-vascular endothelial growth factor treatment using optical coherence tomography angiography Optical coherence tomography of patients with Parkinson’s disease and progressive supranuclear palsy Automatic quantification of superficial foveal avascular zone in optical coherence tomography angiography implemented with deep learning OCT-Based Periodontal Inspection Framework New World Resources and Perimeter Medical Imaging Provide Updates Regarding Their Amalgamation Transaction and Announce Amended and Restated Arrangement Agreement