1. Articles from Won Hyuk Jang

    1-4 of 4
    1. Dermoscopy guided dark-field multi-functional optical coherence tomography

      Dermoscopy guided dark-field multi-functional optical coherence tomography

      Dermoscopy is a skin surface microscopic technique allowing specular reflection free observation of the skin, and has been used to examine pigmented skin lesions. However, dermoscopy has limitations in providing depth information due to lack of 3D resolution. In order to overcome the limitations, we developed dermoscopy guided multi-functional optical coherence tomography (MF-OCT) providing both high-contrast superficial information and depth-resolved structural, birefringent, and vascular information of the skin simultaneously. Dermoscopy and MF-OCT were combined by using a dichroic mirror, and dark-field configuration was adapted for MF-OCT to reduce specular reflection. After characterization, dermoscopy guided MF-OCT was applied to several human ...

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    2. Visualization of prostatic nerves by polarization-sensitive optical coherence tomography

      Visualization of prostatic nerves by polarization-sensitive optical coherence tomography

      Preservation of prostatic nerves is critical to recovery of a man’s sexual potency after radical prostatectomy. A real-time imaging method of prostatic nerves will be helpful for nerve-sparing radical prostatectomy (NSRP). Polarization-sensitive optical coherence tomography (PS-OCT), which provides both structural and birefringent information of tissue, was applied for detection of prostatic nerves in both rat and human prostate specimens, ex vivo. PS-OCT imaging of rat prostate specimens visualized highly scattering and birefringent fibrous structures superficially, and these birefringent structures were confirmed to be nerves by histology or multiphoton microscopy (MPM). PS-OCT could easily distinguish these birefringent structures from surrounding ...

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      Mentions: Ki Hean Kim
    3. Dark-field polarization-sensitive optical coherence tomography

      Dark-field polarization-sensitive optical coherence tomography

      Polarization-sensitive optical coherence tomography (PS-OCT) is a functional OCT providing both structural and birefringent information of the sample, and it has been applied to the studies of various organs having polarization properties. Fiber-based PS-OCT is sensitive to specular reflection from the sample surface, because signal saturation due to the strong specular reflection can make the polarization measurement difficult. We developed a dark-field PS-OCT which can avoid the specular reflection problem. Dark-field PS-OCT was implemented by adapting a hybrid method of Bessel-beam illumination and Gaussian-beam detection, and a PS-OCT method based on passive delay unit (PDU). The new system was characterized ...

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    4. In vivo wide-field reflectance/fluorescence imaging and polarization-sensitive optical coherence tomography of human oral cavity with a forward-viewing probe

      In vivo wide-field reflectance/fluorescence imaging and polarization-sensitive optical coherence tomography of human oral cavity with a forward-viewing probe

      We report multimodal imaging of human oral cavity in vivo based on simultaneous wide-field reflectance/fluorescence imaging and polarization-sensitive optical coherence tomography (PS-OCT) with a forward-viewing imaging probe. Wide-field reflectance/fluorescence imaging and PS-OCT were to provide both morphological and fluorescence information on the surface, and structural and birefringent information below the surface respectively. The forward-viewing probe was designed to access the oral cavity through the mouth with dimensions of approximately 10 mm in diameter and 180 mm in length. The probe had field of view (FOV) of approximately 5.5 mm in diameter, and adjustable depth of field (DOF ...

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    1-4 of 4
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  2. Topics in the News

    1. (4 articles) Ki Hean Kim
    2. (2 articles) Yonsei University
    3. (2 articles) Taejun Wang
    4. (1 articles) Gwangju Institute of Science and Technology
    5. (1 articles) Chulmin Joo
    6. (1 articles) Northwestern University
    7. (1 articles) Wenzhou Medical College
    8. (1 articles) Jay S. Duker
    9. (1 articles) Joel S. Schuman
    10. (1 articles) Jin Wook Jeoung
    11. (1 articles) Hao F. Zhang
    12. (1 articles) James G. Fujimoto
    13. (1 articles) Cheng Sun
    14. (1 articles) Andre J. Witkin
    15. (1 articles) Tomey Corporation
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    In vivo wide-field reflectance/fluorescence imaging and polarization-sensitive optical coherence tomography of human oral cavity with a forward-viewing probe Dark-field polarization-sensitive optical coherence tomography Visualization of prostatic nerves by polarization-sensitive optical coherence tomography Dermoscopy guided dark-field multi-functional optical coherence tomography SPATIAL DISTRIBUTION OF CHORIOCAPILLARIS IMPAIRMENT IN EYES WITH CHOROIDAL NEOVASCULARIZATION SECONDARY TO AGE-RELATED MACULAR DEGENERATION: A Quantitative OCT Angiography Study A Deep Learning Approach in Rebubbling After Descemet's Membrane Endothelial Keratoplasty Impact of optical coherence tomography‐derived neointimal tissue morphology on development of very late in‐stent restenosis Handheld volumetric manual compression‐based quantitative micro‐elastography Comparison of the Iowa Reference Algorithm to the Heidelberg Spectralis optical coherence tomography segmentation algorithm Quantitative assessment of the effect of acute anaerobic exercise on macular perfusion via swept-source optical coherence tomography angiography in young football players Axial length measurement and detection rates using a swept-source optical coherence tomography based biometer in the presence of a dense vitreous hemorrhage Diagnosing Glaucoma with Spectral-domain Optical Coherence Tomography Using Deep Learning Classifier