1. Articles from Yu Cheol Kim

    1-8 of 8
    1. Relationship between proteinuria and optical coherence tomographic features of the chorioretina in patients with pre-eclampsia

      Relationship between proteinuria and optical coherence tomographic features of the chorioretina in patients with pre-eclampsia

      This retrospective study aimed to evaluate the correlation between ophthalmologic factors and proteinuria in patients with pre-eclampsia using swept-source optical coherence tomography (OCT) and OCT angiography. In total, 61 pregnant patients diagnosed with pre-eclampsia were recruited during their hospital stay. The authors investigated the relationship between urine protein-creatinine ratio (PCR) and chorioretinal measurements including choroidal thickness (CT), choroidal vascularity index (CVI), foveal avascular zone (FAZ), vascular density (VD), ganglion cell layer+ (GCL+) and GCL++. The associations between mean arterial pressure (MAP) and ophthalmologic factors were also evaluated. Central subfield CT of the right eye (p = 0.031) and paracentral CT ...

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    2. A New Optical Coherence Tomography Method for Subfoveal Choroidal Thickness Measurement: A Singlecenter Observational Study

      A New Optical Coherence Tomography Method for Subfoveal Choroidal Thickness Measurement: A Singlecenter Observational Study

      Background : Several macular pathologies are associated with choroidal vascular supply, and thus require choroidal thickness evaluation. However, there is no standard subfoveal choroidal thickness (SFCT) measuring method. This study investigated a new method to measure the SFCT, using optical coherence tomography. Methods : This is a single-center observational study. Eighty-two senior medical students participated as observers and independently measured the SFCT on five standard optical coherence tomography images of healthy adults in a tertiary care setting. They used three different methods: (1) the observer’s own method, (2) the conventional method, perpendicular to the retinal pigment epithelium, and (3) the new ...

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    3. Significance of outer retinal undulation on preoperative optical coherence tomography in rhegmatogenous retinal detachment

      Significance of outer retinal undulation on preoperative optical coherence tomography in rhegmatogenous retinal detachment

      Rhegmatogenous retinal detachment (RRD) is a vision-threatening pathology. Optical coherence tomography (OCT) is useful for evaluating retinal damage and visual prognosis in patients with RRD. Outer retinal undulation (ORU) is often observed on preoperative OCT in RRD. Therefore, we evaluated the correlation between ORU seen on preoperative OCT and pre/post-operative factors in RRD. Patients with RRD (114 eyes) underwent reattachment surgery and ≥ 6 months of follow-up. According to the condition of the macula on preoperative OCT, cases were divided into macula-on RRD (65 eyes) or macula-off RRD (49 eyes). Patients were classified into acute (< 10 days), subacute (10–30 ...

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    4. Analysis of Fluorescein Angiography and Optical Coherence Tomography in Acute Cerebral Infarction Patients

      Analysis of Fluorescein Angiography and Optical Coherence Tomography in Acute Cerebral Infarction Patients

      Purpose To evaluate ocular findings of patients with acute cerebral infarction by analyzing fluorescein angiography (FAG) and optical coherence tomography (OCT). Methods We retrospectively reviewed the medical records of patients with acute cerebral infarction. FAG was used to analyze arm to retina time and arteriovenous (AV) transit time. The peripapillary retinal nerve fiber layer (pRNFL) was analyzed using OCT, and the data were compared with those of patients diagnosed with idiopathic epiretinal membrane (control group). Results Seventy-three patients were included in the patient group, and 56 participants were in the control group. In 27% of the subjects in the patient ...

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    5. Spectral-domain optical coherence tomography findings of tractional retinal elevation in patients with diabetic retinopathy

      Spectral-domain optical coherence tomography findings of tractional retinal elevation in patients with diabetic retinopathy

      Purpose To evaluate the clinical and morphological characteristics as well as the surgical outcomes of tractional retinal elevation (TRE) in patients with proliferative diabetic retinopathy (PDR) by analyzing spectral-domain optical coherence tomography (SD-OCT). Methods SD-OCT images of 26 eyes (24 patients) who visited our clinic because of TRE and PDR from August 2011 to August 2014 were reviewed. According to the presence or absence of tractional retinal detachment (TRD), patients were classified into group 1 (without TRD) or group 2 (with TRD), and the clinical characteristics and surgical outcomes of the two groups were compared. Furthermore, we categorized the SD-OCT ...

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    6. Enhanced High-Density Line Spectral-Domain Optical Coherence Tomography Imaging of the Vitreoretinal Interface: Description of Selected Cases

      Enhanced High-Density Line Spectral-Domain Optical Coherence Tomography Imaging of the Vitreoretinal Interface: Description of Selected Cases

      Purpose : We introduce a new method to observe the morphologic features of the vitreous with spectral-domain optical coherence tomography (SD-OCT) by evaluating and describing the posterior vitreous structure of various selected cases using enhanced high-density (HD) line mode. Methods : This is a descriptive case series of SD-OCT images with enhanced HD line at Denver Health Medical Center, University of Colorado School of Medicine, in 2014. The medical records with ocular images for these patients were analyzed. Results : Enhanced HD line in vitreoretinal mode with SD-OCT offered wide images with well-visible vitreoretinal interface. The posterior precortical vitreous pocket (PPVP), often mistaken ...

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    1-8 of 8
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    Enhanced High-Density Line Spectral-Domain Optical Coherence Tomography Imaging of the Vitreoretinal Interface: Description of Selected Cases Spectral-domain optical coherence tomography findings of tractional retinal elevation in patients with diabetic retinopathy Assessment of posterior vitreous detachment on enhanced high density line optical coherence tomography Analysis of Fluorescein Angiography and Optical Coherence Tomography in Acute Cerebral Infarction Patients Optical Coherence Tomography in Subconjunctival Silicone Oil Significance of outer retinal undulation on preoperative optical coherence tomography in rhegmatogenous retinal detachment A New Optical Coherence Tomography Method for Subfoveal Choroidal Thickness Measurement: A Singlecenter Observational Study Relationship between proteinuria and optical coherence tomographic features of the chorioretina in patients with pre-eclampsia Deep learning models comparison for tissue classification using optical coherence tomography images: toward smart laser osteotomy Optical coherence tomography angiography features of macular neovascularization in wet age-related macular degeneration: A cross-sectional study Automatic focus method using interference fringes magnitudes in retinal optical coherence tomography Improved U-Net for Plaque Segmentation of Intracoronary Optical Coherence Tomography Images