1. Kyungpook National University

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    1. Mentioned In 37 Articles

    2. 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
      ...g, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 136-713, South Korea 4School of Electronics Engineering, Kyungpook National University, 1370, Sankyuk 3-dong, Buk-gu, Daegu 702-701, South Korea *Corresponding author:...
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    3. Depth enhancement in spectral domain optical coherence tomography using bidirectional imaging modality with a single spectrometer

      Depth enhancement in spectral domain optical coherence tomography using bidirectional imaging modality with a single spectrometer
      A method for depth enhancement is presented using a bidirectional imaging modality for spectral domain optical coherence tomography (SD-OCT). Two precisely aligned sample arms along with two reference arms were utilized in the optical configuration to scan the samples. Using exemplary images of the optical resolution target, Scotch tape, a silicon sheet with two needles, and a leaf, we demonstrated how the developed bidirectional SD-OCT imaging method increases the ability ...
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    4. In vivo imaging of melanoma-implanted magnetic nanoparticles using contrast-enhanced magneto-motive optical Doppler tomography

      In vivo imaging of melanoma-implanted magnetic nanoparticles using contrast-enhanced magneto-motive optical Doppler tomography
      We conducted an initial feasibility study using real-time magneto-motive optical Doppler tomography (MM-ODT) with enhanced contrast to investigate the detection of superparamagnetic iron oxide (SPIO) magnetic nanoparticles implanted into in vivo melanoma tissue. The MM-ODT signals were detected owing to the phase shift of the implanted magnetic nanoparticles, which occurred due to the action of an applied magnetic field. An amplifier circuit-based solenoid was utilized for generating high-intensity oscillating magnetic ...
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    5. Decalcification using ethylenediaminetetraacetic acid for clear microstructure imaging of cochlea through optical coherence tomography

      Decalcification using ethylenediaminetetraacetic acid for clear microstructure imaging of cochlea through optical coherence tomography
      The aim of this study was to analyze the effectiveness of decalcification using ethylenediaminetetraacetic acid (EDTA) as an optical clearing method to enhance the depth visibility of internal soft tissues of cochlea. Ex vivo mouse and guinea pig cochlea samples were soaked in EDTA solutions for decalcification, and swept source optical coherence tomography (OCT) was used as imaging modality to monitor the decalcified samples consecutively. The monitored noninvasive cross-sectional images ...
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    6. A 2-axis Polydimethylsiloxane (PDMS) based electromagnetic MEMS scanning mirror for optical coherence tomography

      A 2-axis Polydimethylsiloxane (PDMS) based electromagnetic MEMS scanning mirror for optical coherence tomography
      Optical coherence tomography (OCT) is a noninvasive imaging tool for visualizing cross-sectional images of biological tissues on a microscale. Various microelectromechanical system (MEMS) techniques have been applied to OCT for endoscopic catheters and handheld probes. Despite having several advantages such as compact sizes and high speeds for real-time imaging, the complexities of the fabrication processes and relatively high costs were bottlenecks for fast clinical translation and commercialization of the earlier ...
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    7. Fundus Autofluorescence, Fluorescein Angiography and Spectral Domain Optical Coherence Tomography Findings of Retinal Astrocytic Hamartomas in Tuberous Sclerosis

      Fundus Autofluorescence, Fluorescein Angiography and Spectral Domain Optical Coherence Tomography Findings of Retinal Astrocytic Hamartomas in Tuberous Sclerosis
      Purpose To analyze the structural and morphological characteristics of retinal astrocytic hamartomas in tuberous sclerosis patients using fundus autofluorescence, fluorescein angiography and spectral-domain optical coherence tomography. Case summary Fundus examination, fundus autofluorescence, fluorescein angiography and spectral-domain optical coherence tomography were performed in three patients with tuberous sclerosis and the morphological and structural characteristics of retinal astrocytic hamartomas were analyzed. In the fundus autofluorescence, type 1 retinal astrocytic hamartoma showed hypofluorescence ...
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    8. 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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    9. Wide-field optical coherence microscopy of the mouse brain slice

      Wide-field optical coherence microscopy of the mouse brain slice
      The imaging capability of optical coherence microscopy (OCM) has great potential to be used in neuroscience research because it is able to visualize anatomic features of brain tissue without labeling or external contrast agents. However, the field of view of OCM is still narrow, which dilutes the strength of OCM and limits its application. In this study, we present fully automated wide-field OCM for mosaic imaging of sliced mouse brains ...
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    10. Lateral resolution enhancement using programmable phase modulator in optical coherence tomography

      Lateral resolution enhancement using programmable phase modulator in optical coherence tomography
      Adaptive optics plays an important role in the correction of high-order aberrations to enhance lateral resolution. An OCT system coupled with a programmable phase modulator is designed to verify lateral resolution improvement. The Hamamatsu high-resolution, non-pixelized, optically addressed light modulator (PAL-SLM) PPM X7550 series is used to correct aberrations, utilizing a simple method based on phase information from OCT images. The advantages of this method are its high simplicity and ...
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    11. Evaluation of the usefulness of three-dimensional optical coherence tomography in a guinea pig model of endolymphatic hydrops induced by surgical obliteration of the endolymphatic duct

      Evaluation of the usefulness of three-dimensional optical coherence tomography in a guinea pig model of endolymphatic hydrops induced by surgical obliteration of the endolymphatic duct
      ...ol of Electronics Engineering, 1370 Sankyuk 3-dong, Buk-gu, Daegu 702-701, Republic of Korea Jeong Hun Jang Kyungpook National University College of Medicine, Department of Otorhinolaryngology, 680 Gukchaebosang-ro, Ju...
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    12. Microscope System, And Method For Providing Augmented Reality Images Of Microscope System

      Microscope System, And Method For Providing Augmented Reality Images Of Microscope System
      Provided is a microscope system. The system comprises: an optical microscope unit for collecting a surface image of an object to be examined; an OCT unit for collecting an optical coherence tomography image of the object to be examined; a PA unit for collecting a photoacoustic image of the object to be examined; an image processing unit for generating an augmented reality image by superimposing the optical coherence tomography image ...
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    13. Quantitative assessment of touch-screen panel by nondestructive inspection with three-dimensional real-time display optical coherence tomography

      Quantitative assessment of touch-screen panel by nondestructive inspection with three-dimensional real-time display optical coherence tomography
      We investigated the use of optical coherence tomography (OCT) to measure several materials immersed in optical adhesives. The effects of variations in the concentration, physical characteristics, and thickness of the materials were studied, and these parameters were found to significantly affect the OCT measurement. The materials were selected for their distinct spectral properties in the infrared region. To ensure reliability, we acquired images using a scanning electron microscope after performing ...
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    14. Method and device for early non-invasive diagnosis of fruit tree disease

      Method and device for early non-invasive diagnosis of fruit tree disease
      The present invention relates to a non-invasive early diagnostic method and device that allows an early diagnosis of Marssonina blotch disease, which infects apple tree leaves, before the occurrence of lesions to enable early prevention of apple Marssonina blotch disease. The method and device of the present invention comprise the following steps: irradiating a broadband light source on an apple tree leaf undergoing diagnosis by means of optical coherence tomography ...
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    15. 1-15 of 37 1 2 3 »
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  2. About Kyungpook National University

    Kyungpook National University

    Kyungpook National University (KNU), is a leading national university in Daegu, South Korea. The university is one of 10 Flagship Korean National Universities. It is one of the three best recognized and oldest national universities with Seoul National University and Pusan National University. The university was established in September 1946, succeeding the former Daegu Teacher's College, Daegu Agricultural College, and Daegu Medical College. In 2008, it merged with Sangju National University.