1. Articles mentioning both Gwangju Institute of Science and Technology and Byeong Ha Lee

    1-24 of 62 1 2 3 »
    1. Angiographic Imaging of an In Vivo Mouse Brain as a Guiding Star for Automatic Digital Refocusing in OCT

      Angiographic Imaging of an In Vivo Mouse Brain as a Guiding Star for Automatic Digital Refocusing in OCT
      A method allows the extraction of the recovery factor that maximizes the image contrast of OCT (optical coherence tomography) and/or OCTA (OCT angiography) of a living subject is proposed in this study. Due to the finite depth of focus in imaging optics, the volume OCT imaging suffers from blurriness in the lateral resolution. By utilizing the digital hologram method or angular spectrum method, the blurred image can be refocused ...
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    2. Identification of Fungus-infected Tomato Seeds Based on Full-Field Optical Coherence Tomography

      Identification of Fungus-infected Tomato Seeds Based on Full-Field Optical Coherence Tomography
      The morphological changes of anthracnose (fungus) -infected tomato seeds have been studied to identify the infection and characterize its effect. Full-field optical coherence tomography (FF-OCT) has been utilized as a nondestructive but efficient modality for visualizing the effects of fungal infection. The cross-sectional images extracted from a stack of en face FF-OCT images showed significant changes with infection in the seed structure. First of all, the seed coat disappeared with ...
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    3. Quantitative discrimination of pearls using polarization-sensitive optical coherence tomography

      Quantitative discrimination of pearls using polarization-sensitive optical coherence tomography
      We propose a robust method that can quantitatively discriminate genuine pearls from imitation ones by introducing the concept of entropy in the polarization-sensitive optical coherence tomography (PS-OCT). Qualitatively, by examining the birefringence properties of the nacre region of pearls with PS-OCT, the genuine pearls can be easily discriminated. To quantify the amount of birefringence formation, however, the concept of phase retardation entropy is introduced, which is expected to have a ...
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    4. In vivo three-dimensional imaging of human corneal nerves using Fourier-domain optical coherence tomography

      In vivo three-dimensional imaging of human corneal nerves using Fourier-domain optical coherence tomography
      We have employed Fourier-domain optical coherence tomography (FD-OCT) to achieve corneal nerve imaging, which could be useful in surgical planning and refractive surgery. Because the three-dimensional (3-D) images of the corneal nerves were acquiredin vivo, unintentional movement of the subject during the measurement led to imaging artifacts. These artifacts were compensated for with a series of signal processing techniques, namely realigning A-scan images to flatten the boundary and cross-correlating adjacent ...
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    5. Examination of Gland Dropout Detected on Infrared Meibography by Using Optical Coherence Tomography Meibography

      Examination of Gland Dropout Detected on Infrared Meibography by Using Optical Coherence Tomography Meibography
      Purpose To elucidate the anatomic details of gland dropout detected on two-dimensional infrared (IR) meibography in cases of dry eye associated with meibomian gland dysfunction (MGD) by using three-dimensional optical coherence tomography (OCT) meibography. Methods In this cross-sectional, observational case series, we enrolled gland dropout detected on IR meibography; the condition was then examined using a real-time swept-source OCT system. Accordingly, a series of 500 raster B-scan OCT images, with ...
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    6. An All-Fiber-Optic Combined System of Noncontact Photoacoustic Tomography and Optical Coherence Tomography

      An All-Fiber-Optic Combined System of Noncontact Photoacoustic Tomography and Optical Coherence Tomography
      We propose an all-fiber-based dual-modal imaging system that combines noncontact photoacoustic tomography (PAT) and optical coherence tomography (OCT). The PAT remotely measures photoacoustic (PA) signals with a 1550-nm laser on the surface of a sample by utilizing a fiber interferometer as an ultrasound detector. The fiber-based OCT, employing a swept-source laser centered at 1310 nm, shares the sample arm of the PAT system. The fiber-optic probe for the combined system ...
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    7. An All-Fiber-Optic Combined System of Noncontact Photoacoustic Tomography and Optical Coherence Tomography

      An All-Fiber-Optic Combined System of Noncontact Photoacoustic Tomography and Optical Coherence Tomography
      We propose an all-fiber-based dual-modal imaging system that combines noncontact photoacoustic tomography (PAT) and optical coherence tomography (OCT). The PAT remotely measures photoacoustic (PA) signals with a 1550-nm laser on the surface of a sample by utilizing a fiber interferometer as an ultrasound detector. The fiber-based OCT, employing a swept-source laser centered at 1310 nm, shares the sample arm of the PAT system. The fiber-optic probe for the combined system ...
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    8. All optical fiber combined-imaging system of photoacoustic and optical coherence tomography

      All optical fiber combined-imaging system of photoacoustic and optical coherence tomography
      We present an all optical fiber combined-imaging system that integrates non-contact photoacoustic tomography (NPAT) and optical coherence tomography (OCT) to simultaneously provide PA and OCT images. The fiber-based PAT system utilizing a Mach-Zehnder interferometer with a fiber laser of 1550 nm measures the photoacoustic signal at the sample surface. For the generation of a PA signal, a pulse train from a bulk type Nd:YAG laser illuminates the sample via ...
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    9. Feature Of The Week 8/26/12: Gwangju Institute of Science and Technology Investigate Tomography Imaging of Single Living Cell Using Optical Tweezers and FF-OCT

      Feature Of The Week 8/26/12: Gwangju Institute of Science and Technology Investigate Tomography Imaging of Single Living Cell Using Optical Tweezers and FF-OCT
      ...formation see recent Article. Courtesy of Woo June Choi from the Gwangju Institute of Science and Technology (GIST). To share this article click Here. Gwangju Institute of Science and recently proposed a label-free depth...
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    10. Tomographic imaging of a suspending single live cell using optical tweezer-combined full-field optical coherence tomography

      Tomographic imaging of a suspending single live cell using optical tweezer-combined full-field optical coherence tomography
      ...echnology, 261 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea 3Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, 261 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea We pro...
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    11. The refractive index measurement technique based on the defocus correction method in full-field optical coherence tomography

      The refractive index measurement technique based on the defocus correction method in full-field optical coherence tomography
      We propose and demonstrate a novel refractive index (RI) measurement by using the numerical-sample-motion based the defocus correction method in full field optical coherence tomography (FF-OCT). Overcoming the general problem in FFOCT that is the position of the focal plane is separated from the position of the image plane when imaging a deep region inside a sample, we measure the separation distance from the position of the focal plane to ...
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    12. 1-24 of 62 1 2 3 »
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  2. Organizations in the News

    1. (7 articles) University of Tsukuba
    2. (2 articles) University of Washington
    3. (2 articles) University of Ulsan
    4. (1 articles) Institute of Applied Physics
    5. (1 articles) UC Irvine
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  3. People in the News

    1. (19 articles) Woo June Choi
    2. (16 articles) Jun Geun Shin
    3. (15 articles) Jihoon Na
    4. (15 articles) Eun Jung Min
    5. (14 articles) Seon Young Ryu
    6. (11 articles) Tae Joong Eom
    7. (9 articles) Myeong Jin Ju
    8. (9 articles) Kwan Seob Park
    9. (8 articles) Hae Young Choi
    10. (7 articles) Ju Wan Kim
    11. (7 articles) Yoshiaki Yasuno
    12. (7 articles) Jonghyun Eom