1. Articles from Junyoung Kim

    1-3 of 3
    1. Flexible endoscopic micro-optical coherence tomography for three-dimensional imaging of the arterial microstructure

      Flexible endoscopic micro-optical coherence tomography for three-dimensional imaging of the arterial microstructure

      Micro-optical coherence tomography (µOCT) is a novel imaging approach enabling visualization of the microstructures of biological tissues at a cellular or sub-cellular level. However, it has been challenging to develop a miniaturized flexible endoscopic µOCT probe allowing helical luminal scanning. In this study, we built a flexible endoscopic µOCT probe with an outer diameter of 1.2 mm, which acquires three-dimensional images of the arterial microstructures via helical scanning with an axial and lateral resolutions of 1.83 µm and 3.38 µm in air, respectively. Furthermore, the depth of focus of the µOCT imaging probe was extended two-fold using ...

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    2. Endoscopic micro-optical coherence tomography with extended depth of focus using a binary phase spatial filter

      Endoscopic micro-optical coherence tomography with extended depth of focus using a binary phase spatial filter

      Micro-optical coherence tomography (μOCT) is an advanced imaging technique that acquires a three-dimensional microstructure of biological samples with a high spatial resolution, up to 1 μm, by using a broadband light source and a high numerical aperture (NA) lens. As high NA produces a short depth of focus (DOF), extending the DOF is necessary to obtain a reasonable imaging depth. However, due to the complexity of optics and the limited space, it has been challenging to fabricate endoscopic μOCT, which is essential for clinical translation. Here, we report an endoscopic μOCT probe with an extended DOF by using a binary ...

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    3. Design and fabrication of an optical probe with a phase filter for extended depth of focus

      Design and fabrication of an optical probe with a phase filter for extended depth of focus

      The trade-off between spot size and depth of focus (DOF) often limits the performance of optical systems, such as optical coherence tomography and optical tweezers. Although researchers have proposed various methods to extend the DOF in free-space optics, many are difficult to implement in miniaturized optical probes due to space limitations. In this study, we present an optical probe with an extended DOF using a binary phase spatial filter (BPSF). The BPSF pattern was fabricated on the distal tip of an optical probe with a diameter of 1 mm by replica molding soft lithography, which can be easily implemented in ...

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    1-3 of 3
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  2. Topics in the News

    1. (2 articles) Hanyang University
    2. (2 articles) Boston University
    3. (2 articles) Massachusetts General Hospital
    4. (1 articles) Korea University
    5. (1 articles) Korea Advanced Institute of Science and Technology
    6. (1 articles) Nara Medical University
    7. (1 articles) University of Maryland
    8. (1 articles) University of Ulsan
    9. (1 articles) FDA
    10. (1 articles) Duke University
    11. (1 articles) University of Queensland
    12. (1 articles) Cleveland Clinic
    13. (1 articles) Kobe University Graduate School of Medicine
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    Design and fabrication of an optical probe with a phase filter for extended depth of focus Endoscopic micro-optical coherence tomography with extended depth of focus using a binary phase spatial filter Flexible endoscopic micro-optical coherence tomography for three-dimensional imaging of the arterial microstructure A novel algorithm for multiplicative speckle noise reduction in ex vivo human brain OCT images Volumetric characterization of microvasculature in ex vivo human brain samples by serial sectioning optical coherence tomography Depth of focus extension in optical coherence tomography using ultrahigh chromatic dispersion of zinc selenide Retinal changes in bipolar disorder as an endophenotype candidate: Comparison of OCT-detected retinal changes in patients, siblings, and healthy controls Intraoperative optical coherence tomography guided 25G micro-amount trajectory vitrectomy for the treatment of penetrating ocular injury caused by a foreign body in the right eye: A case study Optical coherence tomography angiography reveals paradoxically decreasing choroidal thickness & increasing blood flow in remitting Vogt Koyanagi Harada syndrome A comparison of macular ganglion cell and retinal nerve fibre layer optical coherence tomographic parameters as predictors of visual outcomes of surgery for pituitary tumours Fundus Changes Evaluated by OCTA in Patients With Cerebral Small Vessel Disease and Their Correlations: A Cross-Sectional Study Optical Coherence Tomography Combined with Fluorescein Fundus Angiography under Intelligent Algorithm to Evaluate the Clinical Efficacy of Ranibizumab Combined with Panretinal Photocoagulation in the Treatment of Macular Edema of Diabetic Retinopathy Pati