1. Articles from Yong-il Shin

    1-7 of 7
    1. Repeatability of measuring the vessel density in patients with retinal vein occlusion: An optical coherence tomography angiography study

      Repeatability of measuring the vessel density in patients with retinal vein occlusion: An optical coherence tomography angiography study

      Purpose To determine the repeatability of superficial vessel density measurements using Spectral domain Ocular coherence tomography angiography(SD-OCTA) in patients diagnosed with retinal vein occlusion(RVO). Design Prospective observational study. Subjects Patients who visited our retinal clinic from August 2017 to August 2018, diagnosed with RVO were recruited for the study. Methods Two consecutive 3×3 mm pattern scans were performed using the Cirrus HD-OCT 5000 along with AngioPlex software (Carl Zeiss Meditec) in each eye by single skilled examiner. All scans were analyzed using en face OCTA images to measure vessel density (VD) automatically. For further analysis of the ...

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    2. Peripapillary microvascular changes in patients with systemic hypertension: An optical coherence tomography angiography study

      Peripapillary microvascular changes in patients with systemic hypertension: An optical coherence tomography angiography study

      The purpose of this study was to investigate changes in peripapillary microvasculature using optical coherence tomography angiography (OCTA) in systemic hypertension (HTN) patients. This was a cross-sectional study. Based on the duration of HTN, seventy-eight HTN patients were divided into two groups. (HTN group 1: <10 years, 38 eyes; HTN group 2: ≥10 years, 40 eyes) and 90 control subjects. All subjects underwent 6 × 6 mm OCTA scan centered on the optic nerve head. We analyzed peripapillary vessel density (VD) and perfusion density (PD) in superficial capillary plexus among three groups. The average ganglion cell-inner plexiform layer (GC-IPL) and retinal ...

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    3. Comparison of choroidal thickness measurements using swept source and spectral domain optical coherence tomography in pachychoroid diseases

      Comparison of choroidal thickness measurements using swept source and spectral domain optical coherence tomography in pachychoroid diseases

      Purpose To determine the comparability of choroidal thickness (ChT) measurements using swept source (SS) and spectral domain (SD) optical coherence tomography (OCT) devices in patients with pachychoroid diseases. Methods Patients with pachychoroid diseases were recruited. OCT scans were performed sequentially with a Cirrus HD OCT 5000 and Plex Elite 9000. Images were analyzed by two independent observers. Each image was independently measured twice by each observer to determine the intraobserver repeatability. Results A total of 55 eyes were included. The average ChT of the subfoveal area using SS-OCT and SD-OCT was 430.5 ± 68.1 and 428.5 ± 57.9 ...

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    4. Peripapillary microvasculature in patients with diabetes mellitus: An optical coherence tomography angiography study

      Peripapillary microvasculature in patients with diabetes mellitus: An optical coherence tomography angiography study

      To evaluate changes in peripapillary microvascular parameters in diabetes mellitus (DM) patients using optical coherence tomography angiography (OCTA). Seventy-one diabetic patients (40 in the no diabetic retinopathy [DR] group and 31 in the non-proliferative DR [NPDR] group) and 50 control subjects. OCTA (Zeiss HD-OCT 5000 with AngioPlex) 6 × 6 mm scans centered on the optic disc were analyzed. Peripapillary vessel density (VD), perfusion density (PD) in superficial capillary plexus (SCP) were automatically calculated. The average macular ganglion cell-inner plexiform layer (mGC-IPL) and peripapillary retinal nerve fiber layer (pRNFL) thicknesses of the no DR and NPDR groups were significantly thinner than ...

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    5. Retinal Microvascular Change in Hypertension as measured by Optical Coherence Tomography Angiography

      Retinal Microvascular Change in Hypertension as measured by Optical Coherence Tomography Angiography

      Many studies have reported the effect of hypertension on microcirculation of the retina. Advance of optical coherence tomography angiography (OCTA) allows us more detailed observations of microcirculation of the retina. Therefore, we compared OCTA parameters between chronic hypertension (disease duration of at least 10 yrs; Group A, 45 eyes), relieved hypertensive retinopathy (grade IV HTNR < 1 yr prior; Group B, 40 eyes), and normal controls [Group C (50 eyes) ≥ 50 yrs old and Group D (50 eyes) < 50 yrs old]. A 3 × 3 mm macular scan was performed in each group by OCTA. In vessel density of 3 mm full ...

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    6. Diurnal Variation of Retina Thickness Measured with Time Domain and Spectral Domain Optical Coherence Tomography in Healthy Subjects

      Diurnal Variation of Retina Thickness Measured with Time Domain and Spectral Domain Optical Coherence Tomography in Healthy Subjects

      Purpose. To investigate diurnal variations in macular thickness and total macular volume using time domain optical coherence tomography (TD-OCT) and spectral domain OCT (SD-OCT) in healthy subjects. Methods. Data were derived from 52 eyes of 52 healthy subjects. Macular thickness, macular volume was measured by using TD-OCT and SD-OCT at 8 AM and 6 PM. Results. Comparing TD-OCT measurements, retinal thickness was significantly greater in the afternoon than in the morning in 3 of 9 grid subfields: central macular thickness (CMT) (194 vs. 190 μm; P = 0.006), superior inner area (276 vs. 273 μm; P = 0.010), and temporal ...

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    7. Diurnal Variation of Retina Thickness measured with Time Domain and Spectral Domain Optical Coherence Tomography in Normal Subjects

      Diurnal Variation of Retina Thickness measured with Time Domain and Spectral Domain Optical Coherence Tomography in Normal Subjects
      Purpose: To investigate diurnal variation in macular thickness and total macular volume using time domain optical coherence tomography (TD OCT) and spectral domain OCT (SD OCT) in normal subjects. Methods: Data was derived from 52 eyes from 52 normal subjects. Macular thickness, macular volume were measured by using TD OCT and SD OCT at 8 a.m. and 6 p.m. Results: Comparing TD OCT measurements, retinal thickness was significantly greater in the afternoon than in the morning in 3 of 9 grid subfields: central macular thickness (CMT) (194 vs. 190 um, p=0.006) and the superior and temporal ...
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    1-7 of 7
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    1. (7 articles) Chungnam National University Hospital
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    Diurnal Variation of Retina Thickness measured with Time Domain and Spectral Domain Optical Coherence Tomography in Normal Subjects Diurnal Variation of Retina Thickness Measured with Time Domain and Spectral Domain Optical Coherence Tomography in Healthy Subjects Retinal Microvascular Change in Hypertension as measured by Optical Coherence Tomography Angiography Peripapillary microvasculature in patients with diabetes mellitus: An optical coherence tomography angiography study Comparison of choroidal thickness measurements using swept source and spectral domain optical coherence tomography in pachychoroid diseases Peripapillary microvascular changes in patients with systemic hypertension: An optical coherence tomography angiography study Repeatability of measuring the vessel density in patients with retinal vein occlusion: An optical coherence tomography angiography study Vascular and Structural Alterations of the Choroid Evaluated by Optical Coherence Tomography Angiography and Enhanced-Depth Imaging Optical Coherence Tomography in Eyes with Reticular Pseudodrusen and Soft Drusen Total venous nature of retinal deep capillary plexus inferred by continuity of prominent middle limiting membrane sign in optical coherence tomography Evaluating Onychomycosis Outcomes 2 Months into an 11-month-long Efinaconazole Regimen: The Role of Optical Coherence Tomography Accuracy of Common Motion Estimators in Wave-Based  Optical Coherence Elastography Quantitative evaluation of the dynamic activity of HeLa cells in different viability states using dynamic full-field optical coherence microscopy