1. Chungnam National University Hospital

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    1. Mentioned In 28 Articles

    2. 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 33 mm pattern scans were performed using the Cirrus HD-OCT 5000 along with AngioPlex software (Carl ...
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    3. A comparison of choroidal thicknesses between pachychoroid and normochoroid eyes acquired from wide‐field swept‐source OCT

      A comparison of choroidal thicknesses between pachychoroid and normochoroid eyes acquired from wide‐field swept‐source OCT
      Purpose We investigated the wide‐field choroidal thickness (CT) using swept‐source optical coherence tomography (SS‐OCT) and compared the characteristics of the choroidal layer between pachychoroid and normochoroid groups. Methods A total of 120 eyes from 120 normal subjects were included. All subjects were divided into two groups according to the subfoveal CT (300 m, pachychoroid group; 300m, normochoroid group). All subjects underwent an HD spotlight 16 mm scan ...
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    4. Effects of Prolonged Type 2 Diabetes on the Inner Retinal Layer and Macular Microvasculature: An Optical Coherence Tomography Angiography Study

      Effects of Prolonged Type 2 Diabetes on the Inner Retinal Layer and Macular Microvasculature: An Optical Coherence Tomography Angiography Study
      Purpose: To identify the effects of prolonged type 2 diabetes (T2DM) on macular microcirculation and the inner retinal layer in diabetic eyes without clinical diabetic retinopathy (DR). Methods: 97, 92, and 57 eyes in the control, patients with T2DM 10 years (DM group one), and patients with T2DM 10 years (DM group two) were enrolled. The ganglion cell-inner plexiform layer (GC-IPL) thickness and superficial vessel density (VD) were compared. Linear ...
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    5. 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 6mm OCTA scan centered on the ...
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    6. 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 ...
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    7. Signal Strength as an Important Factor in the Analysis of Peripapillary Microvascular Density Using Optical Coherence Tomography Angiography

      Signal Strength as an Important Factor in the Analysis of Peripapillary Microvascular Density Using Optical Coherence Tomography Angiography
      The quality of the scan image is important in peripapillary circulation analysis using optical coherence tomography angiography (OCTA). We aimed to investigate the effects of signal strength (SS) on the peripapillary microvascular density acquired from OCTA. A total of 259 eyes from 259 young healthy subjects were included. Peripapillary OCTA images using 33mm angiography scan were acquired from all participants. Subjects were divided into four groups according to the SS ...
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    8. Factors Affecting Repeatability of Assessment of the Retinal Microvasculature Using Optical Coherence Tomography Angiography in Healthy Subjects

      Factors Affecting Repeatability of Assessment of the Retinal Microvasculature Using Optical Coherence Tomography Angiography in Healthy Subjects
      Various factors can affect repeatability of optical coherence tomography angiography (OCTA) measurements, and they have not been studied sufficiently. We aimed to investigate the factors associated with the repeatability of automated superficial retinal vessel density (VD) and foveal avascular zone (FAZ) metrics acquired from OCTA. A total of 141 normal eyes from 141 healthy subjects were included, and two consecutive macular 66-mm angiography scans were performed. VD, perfusion density (PD ...
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    9. 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) 66mm scans centered on the optic disc were analyzed. Peripapillary vessel density (VD), perfusion density (PD) in superficial capillary plexus (SCP) were automatically ...
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    10. Influence of Epiretinal Membranes on the Retinal Nerve Fiber Layer Thickness Measured by Spectral Domain Optical Coherence Tomography in Glaucoma

      Influence of Epiretinal Membranes on the Retinal Nerve Fiber Layer Thickness Measured by Spectral Domain Optical Coherence Tomography in Glaucoma
      Purpose We investigated changes in the thickness of the peripapillary retinal nerve fiber layer (RNFL) following the onset of an epiretinal membrane (ERM) in glaucoma patients. Methods Among regularly monitored glaucoma patients, patients with a newly diagnosed ERM were consecutively enrolled. Before and after the onset of ERM, the RNFL thickness was measured using spectral domain optical coherence tomography, and a visual field examination was performed using a Humphrey field ...
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    11. Characteristics of retinal layer thickness in acute anterior uveitis: an optical coherence tomography study

      Characteristics of retinal layer thickness in acute anterior uveitis: an optical coherence tomography study
      Purpose To determine the changes in peripapillary retinal nerve fiber layer (pRNFL), macular and ganglion cell‐inner plexiform layer (GC‐IPL) thicknesses in patients with acute anterior uveitis (AAU). Methods Patients diagnosed with unilateral non‐infectious AAU and normal control were enrolled retrospectively. Optical coherence tomography scans were performed during the initial active phase and inactive phase of AAU. Patients were followed for at least 3 months after resolution of ...
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    12. Long‐term repeatability of optical coherence tomography angiography parameters in healthy eyes

      Long‐term repeatability of optical coherence tomography angiography parameters in healthy eyes
      Purpose To determine the long‐term repeatability of optical coherence tomography angiography (OCTA) parameters in normal eyes. Methods We prospectively enrolled 104 normal eyes. Participants were divided into three groups based on differences in the signal strength (SS) of OCTA scans obtained at two visits at least 6 months apart: group 1, SS difference = 2; group 2, 1; group 3, 0. We measured a foveal centred scan area of 3 ...
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    13. Interocular Symmetry of Optical Coherence Tomography Angiography Parameters in Normal Eyes of Korean Adults

      Interocular Symmetry of Optical Coherence Tomography Angiography Parameters in Normal Eyes of Korean Adults
      Purpose To evaluate the interocular symmetry of microvascular parameters measured by optical coherence tomography angiography (OCTA) in normal eyes of Korean adults. Methods We retrospectively reviewed the retinal microvascular structure of 91 healthy Korean subjects (182 eyes). We used OCTA to measure the area of the foveal avascular zone (FAZ), vessel density (VD), and perfusion density (PD) in both eyes. Intraclass correlation coefficients (ICCs), coefficients of variation (CVs), and Pearson ...
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    14. Serous Retinal Detachment Causes a Transient Reduction on Spectral Domain OCT Estimates of Ganglion Cell Layer Thickness

      Serous Retinal Detachment Causes a Transient Reduction on Spectral Domain OCT Estimates of Ganglion Cell Layer Thickness
      SIGNIFICANCE During the acute stage of central serous chorioretinopathy (CSC) with retinal elevation, the spectral domain optical coherence tomography (SD-OCT) estimate of ganglion cell layer complex thickness is reduced. Thickness returns to normal after resolution of the event. Measurement error is at least partially responsible for this effect. The reduction in ganglion cell layer complex thickness does not represent atrophy and is not predictive of a poor outcome. PURPOSE We ...
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    15. 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 10yrs; Group A, 45 eyes), relieved hypertensive retinopathy (grade IV HTNR1yr prior; Group B, 40 eyes), and normal controls [Group C (50 eyes)50yrs old and Group ...
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    16. Thickness of the Macula, Retinal Nerve Fiber Layer, and Ganglion Cell-inner Plexiform Layer in the Macular Hole: The Repeatability Study of Spectral-domain Optical Coherence Tomography

      Thickness of the Macula, Retinal Nerve Fiber Layer, and Ganglion Cell-inner Plexiform Layer in the Macular Hole: The Repeatability Study of Spectral-domain Optical Coherence Tomography
      Purpose We measured the thicknesses of the ganglion cell and inner plexiform layer (GCIPL), the macula, and the retinal nerve fiber layer (RNFL) using spectral-domain optical coherence tomography in patients with idiopathic macula holes to analyze the repeatability of these measurements and compare them with those of the fellow eye. Methods We evaluated 85 patients who visited our retinal clinic. The patients were divided into two groups according to their ...
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  2. About Chungnam National University Hospital

    Chungnam National University Hospital

    Chungnam National University Hospital has interests and passion in establishing theory and technology of modern medical science, to cope with rapidly changing medical environment, we are doing our best to introduce high-tech management technology and to make a comfortable hospital through programs to strengthen services for our patients.