1. Korea University

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    1. Mentioned In 93 Articles

    2. 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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      Mentions: Korea University
    3. Decoupling Structural Artifacts in Fiber Optic Imaging by Applying Compressive Sensing

      Decoupling Structural Artifacts in Fiber Optic Imaging by Applying Compressive Sensing
      Endoscopic optical coherence tomography (OCT) is an emerging method for noninvasive microscopic probing in biomedicine. In this paper, the feasibility of alleviating the pixelated structural artifacts created by a fiber bundle-based OCT imaging method is investigated using a novel statistical analysis. We demonstrate an efficient nonparametric iterative compressive sensing (CS) technique that is efficient in reconstructing the original pattern shape from a pixelated image of a reference US Air Force ...
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      Mentions: Korea University
    4. Ultrahigh-Resolution Spectral Domain Optical Coherence Tomography Based on a Linear-Wavenumber Spectrometer

      Ultrahigh-Resolution Spectral Domain Optical Coherence Tomography Based on a Linear-Wavenumber Spectrometer
      In this study we demonstrate ultrahigh-resolution spectral domain optical coherence tomography (UHR SD-OCT) with a linear-wavenumber (k) spectrometer, to accelerate signal processing and to display two-dimensional (2-D) images in real time. First, we performed a numerical simulation to find the optimal parameters for the linear-k spectrometer to achieve ultrahigh axial resolution, such as the number of grooves in a grating, the material for a dispersive prism, and the rotational angle ...
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      Mentions: Korea University
    5. Different optical coherence tomography findings for intracoronary stripe-like filling defects on coronary angiogram in patients with acute coronary syndrome

      Different optical coherence tomography findings for intracoronary stripe-like filling defects on coronary angiogram in patients with acute coronary syndrome
      Stripe-like radiolucent filling defects visualized by conventional coronary angiogram (CAG) usually suggest coronary artery dissection. However, recent endovascular imaging technique with high resolution power such as optical coherence tomography (OCT) makes more detailed intraluminal lesion characterization possible, compared with the conventional CAG, and attests to possibilities of being different clinical situation [1]. We report that stripe-like radiolucent filling defects on CAG proved to have different pathophysiologies by OCT in patients ...
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      Mentions: Korea University
    6. A bi-directional assessment of spontaneous coronary artery dissection by three-dimensional flythrough rending of optical coherence tomography images

      A bi-directional assessment of spontaneous coronary artery dissection by three-dimensional flythrough rending of optical coherence tomography images
      A 71-year-old woman was admitted to our hospital due to unstable chest pain. Coronary angiography demonstrated a complex eccentric lesion with 80% narrowing of the right coronary arterial lumen ( Panel A ). Intravascular optical coherence tomography (IV-OCT) revealed typical characteristics of spontaneous coronary artery...
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    7. Optimization of compute unified device architecture for real-time ultrahigh-resolution optical coherence tomography

      Optimization of compute unified device architecture for real-time ultrahigh-resolution optical coherence tomography
      We propose an optimized signal processing scheme that utilizes the compute unified device architecture (CUDA) for real-time spectral domain optical coherence tomography (OCT). Because linear spline interpolation and the direct spectral reshaping method have low data and control dependencies, these algorithms maximally utilize graphic processing unit (GPU) resources for dispersion control. In addition, data transfer between main memory and GPU, regarded as one of the most wasteful and time-consuming processes ...
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      Mentions: Korea University
    8. Feature Of The Week 8/31/14: Fully Integrated High-speed Intravascular OCT/NIRF Structural/Molecular Imaging In Vivo using a Clinically-available NIRF Emitting Indocyanine Green to Detect Inflamed Lipid-rich Atheromata in Coronary-sized Vessels

      Feature Of The Week 8/31/14: Fully Integrated High-speed Intravascular OCT/NIRF Structural/Molecular Imaging In Vivo using a Clinically-available NIRF Emitting Indocyanine Green to Detect Inflamed Lipid-rich Atheromata in Coronary-sized Vessels
      ... even facilitate new drug development. For more information see recent Article . Courtesy of Jin Won Kim from Korea University Guro Hospital . In current study, we fully integrated near-infrared fluorescence (NIRF) molec...
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    9. Parallel guidance endoscopic optical coherence tomography system for internal diagnosis through active cannulas

      Parallel guidance endoscopic optical coherence tomography system for internal diagnosis through active cannulas
      A parallel guidance endoscopic optical coherence tomography (OCT) system is proposed for minimally invasive internal inspection of inner organs or complex structures for diagnosis. The system is maneuvered to access the target using an active cannulas steerable structures. The integration of a specially designed linkage device with the developed system allows the OCT endoscope to scan with enhanced signal-collective performance, while maintaining its tip at a constant distance from the ...
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    10. Fully Integrated High-Speed Intravascular OCT/NIRF Structural/Molecular Imaging In Vivo Using a Clinically Available Near-Infrared Fluorescence–Emitting Indocyanine Green to Detect Inflamed Lipid-Rich Atheromata in Coronary-Sized Vessels

      Fully Integrated High-Speed Intravascular OCT/NIRF Structural/Molecular Imaging In Vivo Using a Clinically Available Near-Infrared Fluorescence–Emitting Indocyanine Green to Detect Inflamed Lipid-Rich Atheromata in Coronary-Sized Vessels
      ...ute, Chuncheon, Republic of Korea (K.P.). 1. Correspondence to Jin Won Kim, MD, PhD, Cardiovascular Center, Korea University Guro Hospital, 80, Guro-dong, Guro-gu, Seoul 152–703, Republic of Korea. E-mail kjwmm{at}ko...
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    11. Retinal Topography of Myopic Eyes: A Spectral-Domain Optical Coherence Tomography Study

      Retinal Topography of Myopic Eyes: A Spectral-Domain Optical Coherence Tomography Study
      Purpose. The purpose of this study was to investigate topographic characteristics of the retina in myopic eyes. Methods. We reviewed spectral-domain optical coherence tomography (SD-OCT) images of patients with myopia retrospectively. Retinal topography (RT) was defined as the topography of the retinal pigment epithelium layers. Retinal topographies were classified into several types, and the distribution and characteristics of each type were assessed in eyes with varying degrees of axial length ...
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      Mentions: Korea University
    12. 46-60 of 93 « 1 2 3 4 5 6 7 »
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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.