1. Articles from jongmin lee

    1-5 of 5
    1. Optical coherence tomography angiography as a potential screening tool for cerebral small vessel diseases

      Optical coherence tomography angiography as a potential screening tool for cerebral small vessel diseases

      Background The retina and the brain share anatomic, embryologic, and physiologic characteristics. Therefore, retinal imaging in patients with brain disorders has been of significant interest. Using optical coherence tomography angiography (OCTA), a novel quantitative method of measuring retinal vasculature, we aimed to evaluate radial peripapillary capillary (RPC) network density and retinal nerve fiber layer (RNFL) thickness in cognitively impaired patients and determine their association with brain imaging markers. Methods In this prospective cross-sectional study, a total of 69 patients (138 eyes) including 29 patients with amyloid-positive Alzheimer’s disease-related cognitive impairment (ADCI), 25 patients with subcortical vascular cognitive impairment (SVCI ...

      Read Full Article
    2. Spectrally-sampled OCT for sensitivity improvement from limited optical power

      Spectrally-sampled OCT for sensitivity improvement from limited optical power

      Although high optical illumination power is favored in optical coherence tomography (OCT) for better signal-to-noise ratio, optical power is often limited by a damaged threshold for biomedical living tissues and autocorrelation signals observed in tomograms. In order to improve signal sensitivity without increasing the optical illumination power, a spectrally sampled multi-wavelength light source is proposed for the OCT system. A fiber Sagnac comb filter was used to spectrally sample the output of a continuous spectral light source. Point spread function analysis shows that the spectrally sampled OCT has an almost 50% dynamic range improvement in comparison with a conventional continuous ...

      Read Full Article
    3. Quasi-holographic solution to polarization-sensitive optical coherence tomography acceptable to nonlaboratory applications

      Vitali Tougbaev, Tae Joong Eom, Bong-Ahn Yu et al. Experimental proof-of-concept is presented for a quasi-holographic solution to polarization-sensitive optical coherence tomography (PS OCT). Due to decoupling between the reference and sample beams by polarization, the solution seems acceptable to acquisition and communication of optical data in the ... [J. Biomed. Opt. 13, 044014 (2008)] published Mon Aug 11, 2008.
      Read Full Article
    4. Single-body lensed photonic crystal fibers as side-viewing probes for optical imaging systems.

      We report the fabrication and performance of a lensed photonic crystal fiber (PCF) designed as a compact but effective side-viewing optical imaging probe. The lensed-PCF probe was implemented in a single body without using any other fibers or additional optics. The beam expansion region and a focusing ball lens, necessary for a focuser, were simultaneously formed along a small piece of PCF by applying arc discharges. The side-viewing ability was provided by polishing the ball lens with a femtosecond laser to form a total internal reflection surface. The working distance and the transverse resolution of the fabricated single-body lensed-PCF were ...
      Read Full Article
    5. Single-body lensed photonic crystal fibers as side-viewing probes for optical imaging systems

      We report the fabrication and performance of a lensed photonic crystal fiber (PCF) designed as a compact but effective side-viewing optical imaging probe. The lensed-PCF probe was implemented in a single body without using any other fibers or additional optics. The beam expansion region and a ... [Opt. Lett. 33, 34-36 (2008)]
      Read Full Article
    1-5 of 5
  1. Categories

    1. Applications:

      Art, Cardiology, Dentistry, Dermatology, Developmental Biology, Gastroenterology, Gynecology, Microscopy, NDE/NDT, Neurology, Oncology, Ophthalmology, Other Non-Medical, Otolaryngology, Pulmonology, Urology
    2. Business News:

      Acquisition, Clinical Trials, Funding, Other Business News, Partnership, Patents
    3. Technology:

      Broadband Sources, Probes, Tunable Sources
    4. Miscellaneous:

      Jobs & Studentships, Student Theses, Textbooks
  2. Topics in the News

    1. (3 articles) Gwangju Institute of Science and Technology
    2. (2 articles) Seon Young Ryu
    3. (2 articles) Byeong Ha Lee
    4. (2 articles) Jihoon Na
    5. (2 articles) Hae Young Choi
    6. (2 articles) Tae Joong Eom
    7. (2 articles) Kyungpook National University
    8. (2 articles) University of Washington
    9. (2 articles) Jeehyun Kim
    10. (2 articles) Ruchire Eranga Wijesinghe
    11. (2 articles) Mansik Jeon
    12. (1 articles) Pusan National University
    13. (1 articles) Jae-Seok Park
    14. (1 articles) Myung Yung Jeong
    15. (1 articles) Chang-Seok Kim
    16. (1 articles) University of Ulsan
    17. (1 articles) Tokyo Medical & Dental University
    18. (1 articles) University of Toronto
    19. (1 articles) Yasunori Sumi
    20. (1 articles) Ali M. Fard
  3. Popular Articles

  4. Picture Gallery

    Spectrally-sampled OCT for sensitivity improvement from limited optical power Optical coherence tomography angiography as a potential screening tool for cerebral small vessel diseases 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 Retinal Thickness and Microvascular Pattern in Early Parkinson's Disease Artificial Intelligence Algorithms to Diagnose Glaucoma and Detect Glaucoma Progression: Translation to Clinical Practice Multi-directional Morphological Assessment of Single Bacterial Colonies Through Non-invasive Optical Imaging Research Center Pharmaceutical Engineering Awarded Two FDA Contracts for Next-Generation Pharma Technology Influence of cataract surgery on macular vascular density in patients with myopia using optical coherence tomography angiography