1. Kyungpook National University

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    1. Mentioned In 49 Articles

    2. Structural Analysis of Polymer Composites Using Spectral Domain Optical Coherence Tomography

      Structural Analysis of Polymer Composites Using Spectral Domain Optical Coherence Tomography
      The structural analysis of nylon/graphene oxide (NY/GO) and polyetherblockamide/ trisilinolphenyl-polyhederal oligomeric silsesquioxane (PEBA/t-POSS) composites were performed using high-resolution spectral domain optical coherence tomography (SD-OCT). This optical technology revealed both cross-sectional, as well as sub-layer depth information of sample. The non-destructive real-time imaging demonstrated the nature of defects in the composites. The thickness and location of each defect point in the composites were measured using A-scan analysis on ...
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    3. Application of wearable optical coherence tomography (OCT) and Loop-mediated isothermal amplification (LAMP) techniques for In situ real-time field inspection of apple Marssonina blotch disease

      Application of wearable optical coherence tomography (OCT) and Loop-mediated isothermal amplification (LAMP) techniques for In situ real-time field inspection of apple Marssonina blotch disease
      Here we describe the possible application of optical coherence tomography (OCT) to inspect Marssonina coronaria infected apple blotch disease of in situ apple leaves. To fulfill the in situ field inspection requirement, we developed a compact wearable OCT system. For the confirmation of OCT results, simultaneous experiment was performed in realtime using loop-mediated isothermal amplification (LAMP), which is frequently used in agriculture. LAMP method was developed as an alternative approach ...
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    4. Dual illumination for cornea and retina imaging using spectral domain optical coherence tomography

      Dual illumination for cornea and retina imaging using spectral domain optical coherence tomography
      A dual illumination system is proposed for cornea and retina imaging using spectral domain optical coherence tomography (SD-OCT). The system is designed to acquire cornea and retina imaging with dual illumination with limited optics and using a single spectrometer. The beam propagation for cornea and retina imaging in dual illumination enables to acquire the images of different segments. This approach will reduce the imaging time for separate corneal and retinal ...
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    5. In vivo observation of metamorphosis of Plodia interpunctella Hübner using three-dimensional optical coherence tomography

      In vivo observation of metamorphosis of Plodia interpunctella Hübner using three-dimensional optical coherence tomography
      Morphological assessment and three-dimensional reconstructions of internal structures of Plodia interpunctella Hbner during metamorphosis stages were experimentally demonstrated using optical coherence tomography (OCT) for the first time. The conventional, complex sectioning methods were significantly simplified owing to the non-invasive three-dimensional imaging capability of OCT. Further, this study demonstrates the use of OCT as a non-invasive detection tool for in vivo morphological observation of metamorphosis stages to gain a better understanding ...
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    6. In vivo 3D imaging of the human tympanic membrane using a wide-field diagonal-scanning optical coherence tomography probe

      In vivo 3D imaging of the human tympanic membrane using a wide-field diagonal-scanning optical coherence tomography probe
      A wide-field optical coherence tomography (OCT) probe was developed that adapts a diagonal-scanning scheme for three-dimensional (3D) in vivo imaging of the human tympanic membrane. The probe consists of a relay lens to enhance the lateral scanning range up to 7 mm. Motion artifacts that occur with the use of handheld probes were found to be decreased owing to the diagonal-scanning pattern, which crosses the center of the sample to ...
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    7. Optical coherence tomography-integrated, wearable (backpack-type), compact diagnostic imaging modality for in situ leaf quality assessment

      Optical coherence tomography-integrated, wearable (backpack-type), compact diagnostic imaging modality for in situ leaf quality assessment
      We developed a compact, wearable diagnostic imaging modality employing optical coherence tomography for in situ plant leaf quality assessments. This system is capable of diagnosing infected leaves at the initial disease stages. Our system is a versatile backpack-type imaging modality with a compact spectrometer, miniature computer, rechargeable power source, and handheld inspection probe. This method enhances real-time in situ specimen inspection through direct implementation of the imaging modality in a ...
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    8. Optical sensing method to analyze germination rate of Capsicum annum seeds treated with growth-promoting chemical compounds using optical coherence tomography

      Optical sensing method to analyze germination rate of Capsicum annum seeds treated with growth-promoting chemical compounds using optical coherence tomography
      Seed germination rate differs based on chemical treatments, and nondestructive measurements of germination rate have become an essential requirement in the field of agriculture. Seed scientists and other biologists are interested in optical sensing technologies-based biological discoveries due to nondestructive detection capability. Optical coherence tomography (OCT) has recently emerged as a powerful method for biological and plant material discoveries. We report an extended application of OCT by monitoring the germination ...
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    9. Bio-Photonic Detection and Quantitative Evaluation Method for the Progression of Dental Caries Using Optical Frequency-Domain Imaging Method

      Bio-Photonic Detection and Quantitative Evaluation Method for the Progression of Dental Caries Using Optical Frequency-Domain Imaging Method
      The initial detection of dental caries is an essential biomedical requirement to barricade the progression of caries and tooth demineralization. The objective of this study is to introduce an optical frequency-domain imaging technique based quantitative evaluation method to calculate the volume and thickness of enamel residual, and a quantification method was developed to evaluate the total intensity fluctuation in depth direction owing to carious lesions, which can be favorable to ...
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    10. Non-invasive method and apparatus for screening high-quality seeds

      Non-invasive method and apparatus for screening high-quality seeds
      Disclosed is a method and apparatus for the non-invasive selection of high-quality seeds, based on optical coherence tomography, by which pathogen-infected and pathogen-free seeds can be discriminated in a non-invasive manner. The apparatus is operated by the processes of scanning a seed of diagnostic interest in a non-invasive manner using an optical coherence tomographic unit; processing interference signals of the scanned tomographic images to produce tomographic image data of the ...
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    11. Full-Field Optical Coherence Tomography Using Galvo Filter-Based Wavelength Swept Laser

      Full-Field Optical Coherence Tomography Using Galvo Filter-Based Wavelength Swept Laser
      We report a wavelength swept laser-based full-field optical coherence tomography for measuring the surfaces and thicknesses of refractive and reflective samples. The system consists of a galvo filterbased wavelength swept laser and a simple Michelson interferometer. Combinations of the reflective and refractive samples are used to demonstrate the performance of the system. By synchronizing the camera with the source, the cross-sectional information of the samples can be seen after each ...
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    12. Two-axis polydimethylsiloxane-based electromagnetic microelectromechanical system scanning mirror for optical coherence tomography

      Two-axis polydimethylsiloxane-based electromagnetic microelectromechanical system scanning mirror for optical coherence tomography
      Compact size and fast imaging abilities are key requirements for the clinical implementation of an optical coherence tomography (OCT) system. Among the various small-sized technology, a microelectromechanical system (MEMS) scanning mirror is widely used in a miniaturized OCT system. However, the complexities of conventional MEMS fabrication processes and relatively high costs have restricted fast clinical translation and commercialization of the OCT systems. To resolve these problems, we developed a two-axis ...
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    13. Fast Industrial Inspection of Optical Thin Film Using Optical Coherence Tomography

      Fast Industrial Inspection of Optical Thin Film Using Optical Coherence Tomography
      An application of spectral domain optical coherence tomography (SD-OCT) was demonstrated for a fast industrial inspection of an optical thin film panel. An optical thin film sample similar to a liquid crystal display (LCD) panel was examined. Two identical SD-OCT systems were utilized for parallel scanning of a complete sample in half time. Dual OCT inspection heads were utilized for transverse (fast) scanning, while a stable linear motorized translational stage ...
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    14. 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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    15. 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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    16. 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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    17. 1-15 of 49 1 2 3 4 »
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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.