1. Korea University

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    1. Mentioned In 61 Articles

    2. Characteristics of retinal vessels in surgically closed macular hole: an optical coherence tomography angiography study

      Characteristics of retinal vessels in surgically closed macular hole: an optical coherence tomography angiography study
      Purpose The purpose of our study was to investigate characteristics of retinal vessels in eyes with surgically closed macular holes (MH). Methods We included patients who underwent surgery for idiopathic MH and a follow-up examination using optical coherence tomography angiography (OCTA). The area of the foveal avascular zone (FAZ) and retinal vascular densities of the superficial capillary plexus (SCP) and deep capillary plexus (DCP) were calculated on the postoperative OCTA ...
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      Mentions: Korea University
    3. Image-Guided Laparoscopic Surgical Tool (IGLaST) Based on the Optical Frequency Domain Imaging (OFDI) to Prevent Bleeding

      Image-Guided Laparoscopic Surgical Tool (IGLaST) Based on the Optical Frequency Domain Imaging (OFDI) to Prevent Bleeding
      We present an image-guided laparoscopic surgical tool (IGLaST) to prevent bleeding. By applying optical frequency domain imaging (OFDI) to a specially designed laparoscopic surgical tool, the inside of fatty tissue can be observed before a resection, and the presence and size of blood vessels can be recognized. The optical sensing module on the IGLaST head has a diameter of less than 390 m and is moved back and forth by ...
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      Mentions: Korea University
    4. 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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    5. Effect of Lateral Decubitus Body Posture on Anterior Chamber Angle in Healthy Subjects: An Anterior Segment Optical Coherence Tomography Study

      Effect of Lateral Decubitus Body Posture on Anterior Chamber Angle in Healthy Subjects: An Anterior Segment Optical Coherence Tomography Study
      Purpose: To investigate the effect of the lateral decubitus (LD) position on the anterior chamber (AC) angle in healthy subjects. Materials and Methods: Twenty-three healthy young subjects were included in this prospective observational study. We measured AC angle parameters in the sitting and the left LD positions using anterior segment optical coherence tomography (Visante OCT): trabecular-iris angle (TIA), angle opening distance (AOD500), trabecular-iris space area (TISA500), anterior chamber width, lens ...
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      Mentions: Korea University
    6. Dual focusing optical coherence imaging system

      Dual focusing optical coherence imaging system
      The present invention relates to a dual focusing optical coherence imaging system. The dual focusing optical coherence imaging system includes: a light source unit for generating broadband light; a main optical distributor for distributing the light generated from the light source to allow the light to be propagated; an interference unit including first and second interference parts for forming interference signals with respect to different focused areas of an object ...
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      Mentions: Korea University
    7. High-resolution, dual-depth spectral-domain optical coherence tomography with interlaced detection for whole-eye imaging

      High-resolution, dual-depth spectral-domain optical coherence tomography with interlaced detection for whole-eye imaging
      ... Bldg. 47, Gyeongdae-ro 17 gil, Buk-gu, Daegu 702-832, South Korea 3Department of Biomicrosystem Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 136-713, South Korea 4School of Electronics Engineering, Kyu...
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    8. Characterization of lipid-rich plaques using spectroscopic optical coherence tomography

      Characterization of lipid-rich plaques using spectroscopic optical coherence tomography
      Intravascular optical coherence tomography (IV-OCT) is a high-resolution imaging method used to visualize the internal structures of walls of coronary arteries in vivo . However, accurate characterization of atherosclerotic plaques with gray-scale IV-OCT images is often limited by various intrinsic artifacts. In this study, we present an algorithm for characterizing lipid-rich plaques with a spectroscopic OCT technique based on a Gaussian center of mass (GCOM) metric. The GCOM metric, which reflects ...
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    9. Automated detection of vessel lumen and stent struts in intravascular optical coherence tomography to evaluate stent apposition and neointimal coverage

      Automated detection of vessel lumen and stent struts in intravascular optical coherence tomography to evaluate stent apposition and neointimal coverage
      Purpose: Intravascular optical coherence tomography (IV-OCT) is a high-resolution imaging method used to visualize the microstructure of arterial walls in vivo . IV-OCT enables the clinician to clearly observe and accurately measure stent apposition and neointimal coverage of coronary stents, which are associated with side effects such as in-stent thrombosis. In this study, the authors present an algorithm for quantifying stent apposition and neointimal coverage by automatically detecting lumen contours and ...
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    10. Microperimetry and spectral domain optical coherence tomography in myelinated retinal nerve fibers

      Microperimetry and spectral domain optical coherence tomography in myelinated retinal nerve fibers
      Dear Sir, I write to present the correlation between microperimetric (MP) values and the density of myelinated retinal nerve fibers (MNFs) in optical coherence tomography (OCT) imaging. MNFs appear as white or gray-white striated patches that correspond in shape to the distribution of retinal nerve fibers and demonstrate frayed borders[1] . Visual system myelination normally begins at the optic tracts at 7mo of gestational age and progresses anteriorly, finishing within ...
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    11. Intracoronary dual-modal optical coherence tomography-near-infrared fluorescence structural–molecular imaging with a clinical dose of indocyanine green for the assessment of high-risk plaques and stent-associated inflammation in a beating coronary artery

      Intracoronary dual-modal optical coherence tomography-near-infrared fluorescence structural–molecular imaging with a clinical dose of indocyanine green for the assessment of high-risk plaques and stent-associated inflammation in a beating coronary artery
      Aims Inflammation plays essential role in development of plaque disruption and coronary stent-associated complications. This study aimed to examine whether intracoronary dual-modal optical coherence tomography (OCT)-near-infrared fluorescence (NIRF) structuralmolecular imaging with indocyanine green (ICG) can estimate inflammation in swine coronary artery. Methods and results After administration of clinically approved NIRF-enhancing ICG (2.0 mg/kg) or saline, rapid coronary imaging (20 mm/s pullback speed) using a fully integrated ...
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    12. Optically deviated focusing method based high-speed SD-OCT for in vivo retinal clinical applications

      Optically deviated focusing method based high-speed SD-OCT for in vivo retinal clinical applications
      The aim of this study is to provide accurately focused, high-resolution in vivo human retinal depth images using an optically deviated focusing method with spectral-domain optical coherence tomography (SD-OCT) system. The proposed method was applied to increase the retinal diagnosing speed of patients with various values of retinal distances (i.e., the distance between the crystalline eye lens and the retina). The increased diagnosing speed was facilitated through an optical ...
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    13. Diagnostic Optical Imaging Technology and Its Principles (Book Chapter)

      Diagnostic Optical Imaging Technology and Its Principles (Book Chapter)
      Analysis of tissue structures is important for investigating pathological changes and diagnosing neural diseases. Recent advances in ophthalmology regarding the diagnosis of neurosensory retinal diseases have introduced optical coherence tomography (OCT) as a near-infrared imaging modality to provide noninvasive and real-time imaging and sensing with ultrahigh resolution for imaging subsurface cross sections of the human retina. This chapter gives a brief overview and the basic principles of this emerging optical ...
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      Mentions: Korea University
    14. Live Acquisition of Internal Fingerprint with Automated Detection of Subsurface Layers Using OCT

      Live Acquisition of Internal Fingerprint with Automated Detection of Subsurface Layers Using OCT
      Recently, optical coherence tomography (OCT) was introduced as a novel fingerprint scanning technique. This approach is resistant to fake fingerprint attacks, and is robust against poor fingertip conditions i.e., wet or stained fingers. The method proceeds by scanning a fingertip in three dimensions and capturing a fingerprint from the subsurface layer. Although OCT has the potential to be widely used as a new standard in fingerprint scanning, it is ...
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      Mentions: Korea University
    15. Spectral domain optical coherence tomography with balanced detection using single line-scan camera and optical delay line

      Spectral domain optical coherence tomography with balanced detection using single line-scan camera and optical delay line
      We propose a spectral domain optical coherence tomography (SD-OCT) system that uses a single line-scan detection scheme for balanced detection. Two phase-opposed spectra, generated by two optical fiber couplers, were detected by using a spectrometer with fast optical switching. A 2.69 km optical fiber was introduced to provide a proper time delay to prevent phase errors caused by the difference in measurement time between the two opposing spectra and ...
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  2. About Korea University

    Korea University

    Korea University is a private research university located primarily in Seoul, South Korea, and a member of the SKY (universities). It was founded by Lee Yong-ik in the present-day town of Anam in 1905. The university is the oldest institution of higher education in South Korea. Korea University is a comprehensive research institution consisting of 81 academic departments in 15 colleges and 75 research institutes.  Korea University College of Medicine.