1. Yonsei University

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    1. Mentioned In 197 Articles

    2. Optical Coherence Tomography and Stent Boost Imaging Guided Bioresorbable Vascular Scaffold Overlapping for Coronary Chronic Total Occlusion Lesion

      Optical Coherence Tomography and Stent Boost Imaging Guided Bioresorbable Vascular Scaffold Overlapping for Coronary Chronic Total Occlusion Lesion
      We report herein the optical coherence tomography (OCT) and stent boost imaging guided bioresorbable vascular scaffold (BVS) implantation for right coronary artery (RCA) chronic total occlusion (CTO) lesion. The gold standard for evaluating BVS expansion after percutaneous coronary intervention is OCT. However, stent boost imaging is a new technique that improves fluoroscopy-based assessments of stent overlapping, and the present case shows clinical usefulness of OCT and stent boost imaging guided ...
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    3. Analysis of neointima development in flow diverters using optical coherence tomography imaging

      Analysis of neointima development in flow diverters using optical coherence tomography imaging
      Background Flow diverters are used for the treatment of intracranial aneurysms. Surface modification may decrease the thrombogenicity of flow diverters but the details are unknown. Optical coherence tomography (OCT) is an intravascular imaging test with high resolution which identifies neointimal growth over stents. We compared the development of neointima in a flow diverter and stents with and without surface modification in a swine model. Methods In this study we implanted ...
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    4. Features of optical coherence tomography predictive of choroidal neovascularisation treatment response in pathological myopia in association with fluorescein angiography

      Features of optical coherence tomography predictive of choroidal neovascularisation treatment response in pathological myopia in association with fluorescein angiography
      ackground/Aims The aim of this study was to evaluate the usefulness of several optical coherence tomography (OCT) findings to estimate choroidal neovascularisation (CNV) activity in pathological myopia using fluorescein angiography (FA) as a reference. Methods This was a single-centre, retrospective study. The medical records of patients with active myopic CNV who received intravitreal bevacizumab treatment were reviewed. Parameters to monitor CNV activity were morphological features of CNV on OCT ...
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    5. Clinical Significance of Lipid-Rich Plaque Detected by Optical Coherence Tomography : A 4-Year Follow-Up Study

      Clinical Significance of Lipid-Rich Plaque Detected by Optical Coherence Tomography : A 4-Year Follow-Up Study
      Background Lipid-rich plaque (LRP) is thought to be a precursor to cardiac events. However, its clinical significance in coronary arteries has never been systematically investigated. Objectives This study investigated the prevalence and clinical significance of LRP in the nonculprit region of the target vessel in patients undergoing percutaneous coronary intervention (PCI). Methods The study included 1,474 patients from 20 sites across 6 countries undergoing PCI, who had optical coherence ...
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    6. Comparison of Ocular Biometry and Refractive Outcomes Using IOL Master 700, IOL Master 500, and Ultrasound

      Comparison of Ocular Biometry and Refractive Outcomes Using IOL Master 700, IOL Master 500, and Ultrasound
      Purpose To compare the new swept-source optical coherence tomography based IOL Master 700 to both the partial coherence interferometry based IOL Master 500 and ultrasound A-scan in terms of the ocular biometry and the prediction of postoperative refractive outcomes. Methods A total 67 eyes of 55 patients who received cataract surgery were included in our study. The axial length, anterior chamber depth, and keratometry were measured using IOL Master 700 ...
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    7. Characteristics of Earlier Versus Delayed Presentation of Very Late Drug‐Eluting Stent Thrombosis: An Optical Coherence Tomographic Study

      Characteristics of Earlier Versus Delayed Presentation of Very Late Drug‐Eluting Stent Thrombosis: An Optical Coherence Tomographic Study
      Background The pathophysiology underlying very late drug‐eluting stent ( DES ) thrombosis is not sufficiently understood. Using optical coherence tomography, we investigated characteristics of very late stent thrombosis ( VLST ) according to different onset times. Methods and Results A total of 98 patients from 10 South Korean hospitals who underwent optical coherence tomography for evaluation of very late DES thrombosis were retrospectively included in analyses. VLST occurred at a median of 55 ...
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    8. Comparison of Central Corneal Thickness Measured by Swept-source Optical Coherence Tomography and Ultrasound Pachymetry

      Comparison of Central Corneal Thickness Measured by Swept-source Optical Coherence Tomography and Ultrasound Pachymetry
      Purpose To analyze and compare ultrasound pachymetry (USP) with a more recently adopted device, the intra ocular lens (IOL) master 700, which are both used to measure central corneal thickness. Methods The central corneal thickness was measured in 24 eyes of 12 glaucoma patients and in 83 eyes of 42 normal patients. First, the IOL master 700 was used to measure the central corneal thickness, followed by measurements taken using ...
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    9. Axial length measurements: Comparison of a new swept-source optical coherence tomography–based biometer and partial coherence interferometry in myopia

      Axial length measurements: Comparison of a new swept-source optical coherence tomography–based biometer and partial coherence interferometry in myopia
      ... coherence interferometry (PCI) biometer (IOLMaster, version 5.4) in myopic eyes. Setting Severance Hospital, Yonsei University, Seoul, South Korea. Design Prospective evaluation of a diagnostic test. Methods This study ...
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    10. Dermoscopy guided dark-field multi-functional optical coherence tomography

      Dermoscopy guided dark-field multi-functional optical coherence tomography
      Dermoscopy is a skin surface microscopic technique allowing specular reflection free observation of the skin, and has been used to examine pigmented skin lesions. However, dermoscopy has limitations in providing depth information due to lack of 3D resolution. In order to overcome the limitations, we developed dermoscopy guided multi-functional optical coherence tomography (MF-OCT) providing both high-contrast superficial information and depth-resolved structural, birefringent, and vascular information of the skin simultaneously. Dermoscopy ...
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    11. Cardiovascular OCT image making method and method for detecting stents using thereof

      Cardiovascular OCT image making method and method for detecting stents using thereof
      A cardiovascular OCT image making method which reduces artifacts includes the steps of: inputting a cardiovascular OCT image; converting coordinates of the inputted OCT image into two-dimensional polar coordinates (.theta. and r); generating a brightness control function of the A-line direction based on the blood wall relative to each .theta. value; forming a brightness image in the A-line direction based on the blood wall depending on the brightness control function ...
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    12. Repeatability and Agreement of Swept Source and Spectral Domain Optical Coherence Tomography Evaluations of Thickness Sectors in Normal Eyes

      Repeatability and Agreement of Swept Source and Spectral Domain Optical Coherence Tomography Evaluations of Thickness Sectors in Normal Eyes
      Purpose of the Study: The purpose of the study was to evaluate the clinical efficacy of swept-source optical coherence tomography (SS-OCT), we compared the intradevice repeatability of thickness measurements obtained using SS-OCT to that of measurements obtained using spectral domain OCT (SD-OCT), and assessed the interdevice agreement of thickness measurements. Materials and Methods: This cross-sectional prospective study involved 3 consecutive measurements of peripapillary retinal nerve fiber layer (PP-RNFL) and ganglion ...
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    13. Clinical Significance of Pre-interventional Optical Coherence Tomography in Bioresorbable Vascular Scaffold Implantation

      Clinical Significance of Pre-interventional Optical Coherence Tomography in Bioresorbable Vascular Scaffold Implantation
      Previous studies reported 20-30% of under-expansion or malapposition with BVS, which would increase the risk of adverse events including late stent thrombosis. OCT-guidance may improve more optimized scaffold placement and also better outcomes. However, there is still no sufficient evidence that OCT has an inevitable role in optimal implantation of BVS and it should be more evaluated in real practice. In the study, the investigators will evaluate an incidence of ...
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    14. Assessing Computational Fractional Flow Reserve From Optical Coherence Tomography in Patients With Intermediate Coronary Stenosis in the Left Anterior Descending Artery

      Assessing Computational Fractional Flow Reserve From Optical Coherence Tomography in Patients With Intermediate Coronary Stenosis in the Left Anterior Descending Artery
      Background Intravascular optical coherence tomography (OCT) imaging provides limited information on the functional assessment of coronary stenosis. We evaluated a new approach to OCT imagebased computation modeling, which can be used to estimate the fractional flow reserve (FFR) in patients with intermediate coronary stenosis. Methods and Results Ninety-two patients with intermediate diameter stenosis in the left anterior descending artery underwent both FFR measurement with pressure wires and OCT examination. Using ...
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    15. Age-related differences in corneal epithelial thickness measurements with anterior segment optical coherence tomography

      Age-related differences in corneal epithelial thickness measurements with anterior segment optical coherence tomography
      Purpose To measure corneal epithelial thickness (CET) in healthy adults and to investigate its variation with age by use of anterior segment optical coherence tomography (OCT). Methods A total of 210 healthy individuals were enrolled and divided into four, almost equally sized groups on the basis of age: 1829 years (group 1), 3044 years (group 2), 4559 years (group 3), and 6080 years (group 4). The CET and total corneal ...
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  2. About Yonsei University

    Yonsei University

    Yonsei University. As the oldest private university in Korea, Yonsei University was first established in 1885.  Yonsei’s main campus is ensconced in a spacious, picturesque and natural setting that is located minutes away from of the economic, political, and cultural centers of Seoul's metropolitan downtown. Our 3,500 eminent faculty members conduct cutting-edge research across all academic disciplines. Our 18 graduate schools, 19 colleges and 131 subsidiary institutions plays host to a student body that consists of the most selective pool of high school and university graduates from around the world.  Yonsei University College of Medicine is the medical college associated with Yonsei  University.