1. University of Ulsan

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    1. Mentioned In 126 Articles

    2. Association between Hyperreflective Foci on Spectral-Domain Optical Coherence Tomography and Early Recurrence of Diabetic Macular Edema after Intravitreal Dexamethasone Implantation

      Association between Hyperreflective Foci on Spectral-Domain Optical Coherence Tomography and Early Recurrence of Diabetic Macular Edema after Intravitreal Dexamethasone Implantation
      Purpose . To investigate the associations between hyperreflective foci (HRF) on spectral-domain optical coherence tomography (SD-OCT) and early recurrence of macular edema after intravitreal dexamethasone (DEX) implantation in eyes with refractory diabetic macular edema (DME) to bevacizumab. Methods . Medical records of patients with refractory DME to bevacizumab, who underwent intravitreal DEX implantation and 12-month follow-up, were reviewed. Eyes in which central subfield thickness (CST) increased over 50 m at 3 months ...
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    3. Detection of Optical Coherence Tomography–Defined Thin-Cap Fibroatheroma in the Coronary Artery Using Deep Learning

      Detection of Optical Coherence Tomography–Defined Thin-Cap Fibroatheroma in the Coronary Artery Using Deep Learning
      Aims: . To develop a deep learning model for classifying frames with vs. without optical coherence tomography (OCT)-derived thin-cap fibroatheroma (TCFA). Methods and results: . Total 602 coronary lesions from 602 angina patients were randomized into training and test sets at a 4:1 ratio. A DenseNet model was developed to classify OCT frames with or without OCT-derived TCFA. Gradient-weighted class activation mapping was used to visualize the area of attention ...
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    4. Effects of Age on Peripapillary and Macular Vessel Density Determined Using Optical Coherence Tomography Angiography in Healthy Eyes

      Effects of Age on Peripapillary and Macular Vessel Density Determined Using Optical Coherence Tomography Angiography in Healthy Eyes
      Purpose : To evaluate the effect of age on global and sectoral vascular parameters of the peripapillary area and macula in healthy eyes by using optical coherence tomography angiography (OCT-A). Methods : This retrospective cross-sectional study included 239 eyes of 172 healthy subjects. Subjects were scanned using the high-definition disc angio scan (4.5 4.5 mm), retina angio scan (6 6 mm), and optic nerve head/ganglion cell complex (GCC) modes ...
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    5. Additive Role of Optical Coherence Tomography Angiography Vessel Density Measurements in Glaucoma Diagnoses

      Additive Role of Optical Coherence Tomography Angiography Vessel Density Measurements in Glaucoma Diagnoses
      Purpose This study compared the glaucoma diagnostic abilities of optical coherence tomography (OCT) and optical coherence tomography angiography (OCTA). In addition, the possibility of enhancing diagnostic capability by combining the two modalities was investigated. Methods A total of 131 healthy eyes and 113 glaucomatous eyes were imaged by both OCT and OCTA. In OCT, glaucoma was defined as when the color of the superior or inferior quadrant of the peripapillary ...
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    6. Prediction of coronary thin-cap fibroatheroma by intravascular ultrasound-based machine learning

      Prediction of coronary thin-cap fibroatheroma by intravascular ultrasound-based machine learning
      ackground and aims Although grayscale intravascular ultrasound (IVUS) is commonly used for assessing coronary lesion morphology and optimizing stent implantation, detection of vulnerable plaques by IVUS remains challenging. We aimed to develop machine learning (ML) models for predicting optical coherence tomography-derived thin-cap fibroatheromas (OCT-TCFAs). Methods In 517 patients with angina, 414 and 103 coronary lesions were randomized into training vs. test sets. Each of the IVUS-OCT co-registered frames (including 32 ...
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    7. Optical Coherence Tomography Angiographic Findings of Tamoxifen Retinopathy: Similarity with Macular Telangiectasia Type 2

      Optical Coherence Tomography Angiographic Findings of Tamoxifen Retinopathy: Similarity with Macular Telangiectasia Type 2
      Purpose We aimed to describe the vascular changes in eyes associated with tamoxifen retinopathy using optical coherence tomography angiography (OCTA) and to compare these changes with abnormalities in macular telangiectasia type 2 (MacTel2) previously reported in the literature. Design Retrospective, observational study Participants Seventeen eyes with tamoxifen retinopathy and 17 eyes of age-matched normal controls. Methods The medical records of patients who visited the ophthalmology department with a history of ...
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    8. Relationship Between Optical Coherence Tomography Angiography Peripapillary Vessel Density and Lamina Cribrosa Depth

      Relationship Between Optical Coherence Tomography Angiography Peripapillary Vessel Density and Lamina Cribrosa Depth
      Prcis: Peripapillary vessel density assessed by optical coherence tomography angiography has poor global and regional correlations with lamina cribrosa depth , except for the inferotemporal area. Purpose: To investigate the global and regional relationship between the peripapillary vessel density (pVD) assessed by optical coherence tomography angiography (OCT-A) and lamina cribrosa depth (LCD) assessed by enhanced depth imaging spectral-domain optical coherence tomography (SD-OCT). Methods: A total of 38 eyes of 38 healthy ...
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    9. Usefulness of Optical Coherence Tomography in the Preoperative Assessment of Nail Deformities

      Usefulness of Optical Coherence Tomography in the Preoperative Assessment of Nail Deformities
      Secondary nail deformities are often seen at some time after fingertip and nail bed injuries. A proper evaluation of the fingernail enables appropriate diagnosis and treatment, especially in patients who need surgical management. To date, ultrasound and magnetic resonance imaging are the only diagnostic tools that most surgeons use in cases of nail deformities. Herein, we report the case of a patient with a nail deformity who underwent successful correction ...
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    10. Quantitative evaluation of skin surface roughness using optical coherence tomography in vivo

      Quantitative evaluation of skin surface roughness using optical coherence tomography in vivo
      The quantitative monitoring of skin topography is important in the field of cosmetics and dermatology. The most widespread method for determining skin roughness in vivo is to use skin microrelief, PRIMOS device, which allows a noninvasive, fast and direct measurement of the skin surface. However, it has drawbacks, such as the interference of backscattering from volumetric skin and motion artifacts. In this study, we demonstrate the potential of OCT for ...
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    11. An Optical Coherence Tomography Angiography Study of the Relationship Between Foveal Avascular Zone Size and Retinal Vessel Density

      An Optical Coherence Tomography Angiography Study of the Relationship Between Foveal Avascular Zone Size and Retinal Vessel Density
      Purpose : To assess the relationship between the size of the foveal avascular zone (FAZ; area and perimeter) and vessel density (VD) at various retinal regions using optical coherence tomography angiography (OCTA) in patients with open-angle glaucoma (OAG). Methods : In this retrospective cross-sectional study, OAG eyes were grouped according to the presence/absence of central visual field (CVF) defects. A control group of normal eyes was also included. OCTA images were ...
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    12. Evaluation of fouling in nanofiltration for desalination using a resistance-in-series model and optical coherence tomography

      Evaluation of fouling in nanofiltration for desalination using a resistance-in-series model and optical coherence tomography
      Resistance-in-series models have been applied to investigate fouling behavior. However, it is difficult to model the influence of morphology on fouling behavior because resistance is indirectly calculated from the water flux and transmembrane pressure. In this study, optical coherence tomography (OCT) was applied to evaluate the resistance of the fouling layer based on fouling morphology. Sodium alginate, humic acid, and bovine serum albumin (BSA) with high salts concentrations (conductivity: 23 ...
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    13. Lamellar keratoplasty using position-guided surgical needle and M-mode optical coherence tomography

      Lamellar keratoplasty using position-guided surgical needle and M-mode optical coherence tomography
      Deep anterior lamellar keratoplasty (DALK) is an emerging surgical technique for the restoration of corneal clarity and vision acuity. The big-bubble technique in DALK surgery is the most essential procedure that includes the air injection through a thin syringe needle to separate the dysfunctional region of the cornea. Even though DALK is a well-known transplant method, it is still challenged to manipulate the needle inside the cornea under the surgical ...
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    14. Macular capillary plexuses after epiretinal membrane surgery: an optical coherence tomography angiography study

      Macular capillary plexuses after epiretinal membrane surgery: an optical coherence tomography angiography study
      Aims To investigate macular vascular integrity using optical coherence tomography angiography (OCTA) in patients undergoing vitrectomy for idiopathic epiretinal membrane (ERM) removal and to determine its association with structural and visual outcomes. Methods Forty-three patients with unilateral ERM who were followed for 6 months after surgery were included. Ophthalmological evaluations included best-corrected visual acuity (BCVA) and spectral-domain OCT (SD-OCT) before surgery and 6 months after surgery. We obtained en face ...
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    15. Glaucoma Diagnostic Capabilities of Foveal Avascular Zone Parameters Using Optical Coherence Tomography Angiography According to Visual Field Defect Location

      Glaucoma Diagnostic Capabilities of Foveal Avascular Zone Parameters Using Optical Coherence Tomography Angiography According to Visual Field Defect Location
      Purpose: To assess the diagnostic ability of foveal avascular zone (FAZ) parameters to discriminate glaucomatous eyes with visual field defects (VFDs) in different locations (central vs. peripheral) from normal eyes. Patients and Methods: Totally, 125 participants were separated into three groups: normal (n=45), glaucoma with peripheral VFD (PVFD, n=45), and glaucoma with central VFD (CVFD, n=35). The FAZ area, perimeter, and circularity and parafoveal vessel density were ...
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  2. About University of Ulsan

    University of Ulsan

    University of Ulsan was founded on February 19, 1969 as the Ulsan Institute of Technology. The University was promoted to a fully-fledged University on March 1, 1985. Located in Mu-guh dong (i.e., Mu-gah neighborhood) within Ulsan, South Korea, the University currently enrolls approximately 10,500 students. The city of Ulsan has been recognized as the Korean city which was built around the corporate base of the multinational Hyundai conglomerate. Thus, the Hyundai Conglomerate announced its plan to give 40 billion won to assist a variety of university-industry cooperation projects. This corporate relationship has helped turn the University into one of South Korea's top rated institutions for graduate job placement, as well as increasing its reputation more broadly as one of the top private universities outside of Seoul