1. Chulmin Joo

    0 Comments Leave a Comment

    1-14 of 14
    1. Mentioned In 14 Articles

    2. Intraoperative margin assessment of human breast tissue in optical coherence tomography images using deep neural networks

      Intraoperative margin assessment of human breast tissue in optical coherence tomography images using deep neural networks
      Objective: In this work, we perform margin assessment of human breast tissue from optical coherence tomography (OCT) images using deep neural networks (DNNs). This work simulates an intraoperative setting for breast cancer lumpectomy. Methods: To train the DNNs, we use both the state-of-the-art methods (Weight Decay and DropOut) and a newly introduced regularization method based on function norms. Commonly used methods can fail when only a small database is available ...
      Read Full Article
    3. Cardiovascular OCT image making method and method for detecting stents using thereof

      Cardiovascular OCT image making method and method for detecting stents using thereof
      A cardiovascular OCT image making method which reduces artifacts includes the steps of: inputting a cardiovascular OCT image; converting coordinates of the inputted OCT image into two-dimensional polar coordinates (.theta. and r); generating a brightness control function of the A-line direction based on the blood wall relative to each .theta. value; forming a brightness image in the A-line direction based on the blood wall depending on the brightness control function ...
      Read Full Article
    4. System and method for auto-ranging in optical coherence tomography

      System and method for auto-ranging in optical coherence tomography
      A system, in one embodiment, includes an optical coherence tomography (OCT) imaging system having a light source configured to emit light. The OCT imaging system further includes a beam splitter configured to receive the light from the light source, split the light into a first light portion directed along a sample arm comprising a sample and a second light portion directed along a reference arm comprising a reference mirror, receive ...
      Read Full Article
    5. 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 ...
      Read Full Article
    6. Automated measurement of stent strut coverage in intravascular optical coherence tomography

      Automated measurement of stent strut coverage in intravascular optical coherence tomography
      Optical coherence tomography (OCT) is a non-invasive, cross-sectional imaging modality that has become a prominent imaging method in percutaneous intracoronary intervention. We present an automated detection algorithm for stent strut coordinates and coverage in OCT images. The algorithm for stent strut detection is composed of a coordinate transformation from the polar to the Cartesian domains and application of second derivative operators in the radial and the circumferential directions. Local region-based ...
      Read Full Article
    7. Photothermal spectral-domain optical coherence reflectometry for direct measurement of hemoglobin concentration of erythrocytes

      Photothermal spectral-domain optical coherence reflectometry for direct measurement of hemoglobin concentration of erythrocytes
      A novel optical detection method for hemoglobin concentration is described. The hemoglobin molecules consisting mainly of iron generate heat upon their absorption of light energy at 532 nm, which subsequently changes the refractive index of the blood. We exploit this photothermal effect to determine the hemoglobin concentration of erythrocytes without any pre-processing of blood. Highly sensitive measurement of refractive index alteration of blood samples is enabled by a spectral-domain low ...
      Read Full Article
    8. System And Method For AUTO-FOCUSING In Optical Coherence Tomography

      System And Method For AUTO-FOCUSING In Optical Coherence Tomography
      A system, in one embodiment, includes an optical coherence tomography (OCT) imaging system having a light source configured to emit light. The OCT imaging system further includes a beam splitter configured to receive the light from the light source, split the light into a first light portion directed along a sample arm comprising a sample and a second light portion directed along a reference arm comprising a reference mirror, receive ...
      Read Full Article
    9. System And Method For AUTO-RANGING In Optical Coherence Tomography

      System And Method For AUTO-RANGING In Optical Coherence Tomography
      A system, in one embodiment, includes an optical coherence tomography (OCT) imaging system having a light source configured to emit light. The OCT imaging system further includes a beam splitter configured to receive the light from the light source, split the light into a first light portion directed along a sample arm comprising a sample and a second light portion directed along a reference arm comprising a reference mirror, receive ...
      Read Full Article
    10. Application of maximum likelihood estimator in nano-scale optical path length measurement using spectral-domain optical coherence phase microscopy

      ...tical path length measurement using spectral-domain optical coherence phase microscopy S. M. Motaghian Nezam, C. Joo, G. J. Tearney, and J. F. de Boer Optics Express, Vol. 16, Issue 22, pp. 17186-1719...
      Read Full Article
    11. Spectral-domain optical coherence phase microscopy for quantitative biological studies (Thesis)

      Spectral-domain optical coherence phase microscopy for quantitative biological studies (Thesis)
      Conventional phase-contrast and differential interference contrast microscopy produce high contrast images of transparent specimens such as cells. However, they do not provide quantitative information or do not have enough sensitivity to detect nanometerlevel structural alterations. We have developed spectral-domain optical coherence phase microscopy (SD-OCPM) for highly sensitive quantitative phase imaging in 3D. This technique employs common-path spectral-domain optical coherence reflectometry to produce depth-resolved reflectance and quantitative phase images with high ...
      Read Full Article
    12. 1-14 of 14
  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. About Chulmin Joo

    Chulmin Joo

    Chulmin Joo is an Assistant Professor School of Mechanical Engineering Yonsei University Seoul, Korea.