1. Articles from Yeongri Jung

    1-7 of 7
    1. 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 the semiconductor production process. We verified the feasibility of the application of OCT for defect inspection and product verification of touch-screen panels.

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    2. Multifunctional nanoprobe to enhance the utility of optical based imaging techniques

      Multifunctional nanoprobe to enhance the utility of optical based imaging techniques

      Several imaging modalities such as optical coherence tomography, photothermal, photoacoustic and magnetic resonance imaging, are sensitive to different physical properties (i.e. scattering, absorption and magnetic) that can provide contrast within biological tissues. Usually exogenous agents are designed with specific properties to provide contrast for these imaging methods. In nano-biotechnology there is a need to combine several of these properties into a single contrast agent. This multifunctional contrast agent can then be used by various imaging techniques simultaneously or can be used to develop new imaging modalities. We reported and characterized a multifunctional nanoparticle, made from gold nanoshells, which exhibits ...

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    3. Label-free 3D imaging of microstructure, blood, and lymphatic vessels within tissue beds in vivo

      Label-free 3D imaging of microstructure, blood, and lymphatic vessels within tissue beds in vivo

      This Letter reports the use of an ultrahigh resolution optical microangiography (OMAG) system for simultaneous 3D imaging of microstructure and lymphatic and blood vessels without the use of an exogenous contrast agent. An automatic algorithm is developed to segment the lymphatic vessels from the microstructural images based on the fact that the lymph fluid is optically transparent. An OMAG system is developed that utilizes a broadband supercontinuum light source, providing an axial resolution of 2.3 μm and lateral resolution of 5.8 μm, capable of resolving the capillary vasculature and lymphatic vessels innervating microcirculatory tissue beds. Experimental demonstration is ...

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    4. Three-Dimensional High-Resolution Imaging of Gold Nanorods Uptake in Sentinel Lymph Nodes

      Three-Dimensional High-Resolution Imaging of Gold Nanorods Uptake in Sentinel Lymph Nodes
      n this paper, we demonstrate an application of a noninvasive imaging modality, photothermal optical coherence tomography (PT-OCT), for imaging gold nanorods (GNRs) uptake in sentinel lymph node (SLN) of mice in situ. This application enables us to obtain higher quality images of SLN structures due to the photothermal contrast properties of the GNRs. It is also demonstrated that GNRs accumulate differently within several SLN structures, and this uptake is time dependent. Finally, we determine the average concentration of GNRs within the whole SLN which is used to demonstrate uptake kinetics of the nanoparticles.
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    5. Highly sensitive imaging of renal microcirculation in vivo using ultrahigh sensitive optical microangiography

      Highly sensitive imaging of renal microcirculation in vivo using ultrahigh sensitive optical microangiography

      Studying renal microcirculation and its dynamics is of great importance for understanding the renal function and further aiding the diagnosis, prevention and treatment of renal pathologies. In this paper, we present a potentially useful method to provide high-sensitive volumetric imaging of renal microcirculations using ultrahigh-sensitive optical microangiography (UHS-OMAG). The UHS-OMAG image system used here is based on spectral domain optical coherence tomography, which uses a broadband light source centered at 1300 nm with an imaging speed of 150 frames per second that requires ~6.7 sec to complete one 3D scan of ~2.5 × 2.5 mm2 area. The technique ...

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    6. High sensitive volumetric imaging of renal microcirculation in vivo using ultrahigh sensitive optical microangiography

      High sensitive volumetric imaging of renal microcirculation in vivo using ultrahigh sensitive optical microangiography

      We present a non-invasive, label-free imaging technique called Ultrahigh Sensitive Optical Microangiography (UHSOMAG) for high sensitive volumetric imaging of renal microcirculation. The UHS-OMAG imaging system is based on spectral domain optical coherence tomography (SD-OCT), which uses a 47000 A-line scan rate CCD camera to perform an imaging speed of 150 frames per second that takes only ~7 seconds to acquire a 3D image. The technique, capable of measuring slow blood flow down to 4 um/s, is sensitive enough to image capillary networks, such as peritubular capillaries and glomerulus within renal cortex. We show superior performance of UHS-OMAG in providing ...

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    7. Label-free 3D optical imaging of microcirculation within sentinel lymph node in vivo

      Label-free 3D optical imaging of microcirculation within sentinel lymph node in vivo

      Sentinel lymph node (SLN) is the first lymph node to drain wastes originated from cancerous tissue. There is a need for an in vivo imaging method that can image the intact SLN in order to further our understanding of its normal as well as abnormal functions. We report the use of ultrahigh sensitive optical microangiography (UHS-OMAG) to image functional microvascular and lymphatic vessel networks that innervate the intact lymph node in mice in vivo. The promising results show a potential role of UHS-OMAG in the future understanding and diagnosis of the SLN involvement in cancer development.

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    1-7 of 7
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  2. Topics in the News

    1. (6 articles) Ruikang K. Wang
    2. (5 articles) University of Washington
    3. (4 articles) Zhongwei Zhi
    4. (2 articles) Oregon Health & Science University
    5. (2 articles) Lin An
    6. (2 articles) Yali Jia
    7. (2 articles) Roberto Reif
    8. (2 articles) Kyungpook National University
    9. (2 articles) University of Washington
    10. (2 articles) Jeehyun Kim
    11. (2 articles) Ruchire Eranga Wijesinghe
    12. (2 articles) Mansik Jeon
    13. (1 articles) Kyungpook National University
    14. (1 articles) Jeehyun Kim
    15. (1 articles) University of Ulsan
    16. (1 articles) Tokyo Medical & Dental University
    17. (1 articles) University of Toronto
    18. (1 articles) Yasunori Sumi
    19. (1 articles) Ali M. Fard
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    High sensitive volumetric imaging of renal microcirculation in vivo using ultrahigh sensitive optical microangiography Label-free 3D optical imaging of microcirculation within sentinel lymph node in vivo Highly sensitive imaging of renal microcirculation in vivo using ultrahigh sensitive optical microangiography Three-Dimensional High-Resolution Imaging of Gold Nanorods Uptake in Sentinel Lymph Nodes Label-free 3D imaging of microstructure, blood, and lymphatic vessels within tissue beds in vivo Multifunctional nanoprobe to enhance the utility of optical based imaging techniques Quantitative assessment of touch-screen panel by nondestructive inspection with three-dimensional real-time display optical coherence tomography A Generic Framework for Fourier-Domain Optical Coherence Tomography Imaging: Software Architecture and Hardware Implementations Vision-Inspection-Synchronized Dual Optical Coherence Tomography for High-Resolution Real-Time Multidimensional Defect Tracking in Optical Thin Film Industry Relative retinal flow velocity detection using optical coherence tomography angiography imaging Comparison of Optical Flow Ratio and Fractional Flow Ratio in Stent-Treated Arteries Immediately After Percutaneous Coronary Intervention Spaceflight Associated Neuro-Ocular Syndrome (SANS): A Systematic Review and Future Directions