1. Massachusetts Institute of Technology

    0 Comments Leave a Comment

    1-15 of 571 1 2 3 4 ... 36 37 38 »

    1. Mentioned In 571 Articles

    3. Volumetric non-local-means based speckle reduction for optical coherence tomography

      Explore OSA | OSA Publishing
      Volumetric non-local-means based speckle reduction for optical coherence tomography
      We present a novel tomographic non-local-means based despeckling technique, TNode, for optical coherence tomography. TNode is built upon a weighting similarity criterion derived for speckle in a three-dimensional similarity window. We present an implementation using a two-dimensional search window, enabling the despeckling of volumes in the presence of motion artifacts, and an implementation using a three-dimensional window with improved performance in motion-free volumes. We show that our technique provides effective ...
      Read Full Article
      Mentions: Brett E. Bouma Massachusetts Institute of Technology Massachusetts General Hospital

    5. A Quantum Field Approach for Advancing Optical Coherence Tomography Part I: First Order Correlations, Single Photon Interference, and Quantum Noise

      Explore OMICS Group
      A Quantum Field Approach for Advancing Optical Coherence Tomography Part I: First Order Correlations, Single Photon Interference, and Quantum Noise
      Optical coherence tomography has become an important imaging technology in cardiology and ophthalmology, with other applications under investigations. Major advances in optical coherence tomography (OCT) imaging are likely to occur through a quantum field approach to the technology. In this paper, which is the first part in a series on the topic, the quantum basis of OCT first order correlations is expressed in terms of full field quantization. Specifically first ...
      Read Full Article
      Mentions: Brigham and Women’s Hospital Massachusetts Institute of Technology Mark E. Brezinski

    7. Robust wavenumber and dispersion calibration for Fourier-domain optical coherence tomography

      Explore OSA | OSA Publishing
      Robust wavenumber and dispersion calibration for Fourier-domain optical coherence tomography
      Many Fourier-domain optical coherence tomography (FD-OCT) systems sample the interference fringes with a non-uniform wavenumber ( k ) interval, introducing a chirp to the signal that depends on the path length difference underlying each fringe. A dispersion imbalance between sample and reference arms also generates a chirp in the fringe signal which, in contrast, is independent of depth. Fringe interpolation to obtain a signal linear in k and compensate dispersion imbalance is ...
      Read Full Article
      Mentions: Brett E. Bouma Massachusetts Institute of Technology Massachusetts General Hospital

    8. Polymeric endovascular strut and lumen detection algorithm for intracoronary optical coherence tomography images

      Explore SPIE Digital Library Cardiology
      Polymeric endovascular strut and lumen detection algorithm for intracoronary optical coherence tomography images
      Polymeric endovascular implants are the next step in minimally invasive vascular interventions. As an alternative to traditional metallic drug-eluting stents, these often-erodible scaffolds present opportunities and challenges for patients and clinicians. Theoretically, as they resorb and are absorbed over time, they obviate the long-term complications of permanent implants, but in the short-term visualization and therefore positioning is problematic. Polymeric scaffolds can only be fully imaged using optical coherence tomography (OCT ...
      Read Full Article
      Mentions: Massachusetts Institute of Technology California Institute of Technology

    10. A Joint Probabilistic Model for Speckle Variance, Amplitude Decorrelation and Interframe Variance (IFV) Optical Coherence Tomography Angiography

      Explore Home - Springer
      A Joint Probabilistic Model for Speckle Variance, Amplitude Decorrelation and Interframe Variance (IFV) Optical Coherence Tomography Angiography
      Optical Coherence Tomography Angiography (OCTA) is a general method to visualize blood flow in biological tissue. Despite its good results in practice, the commonly used Amplitude Decorrelation OCTA (AD-OCTA) measure suffers from a well-understood objective function, which makes it challenging to mathematically model post processing tasks like, e.g., denoising. In this paper, a probabilistic model is developed for the three OCTA measures Speckle Variance OCTA, ADOCTA and the newly ...
      Read Full Article
      Mentions: Massachusetts Institute of Technology James G. Fujimoto Tufts University

    11. Microscope-Integrated Intraoperative Ultrahigh-Speed Swept-Source Optical Coherence Tomography for Widefield Retinal and Anterior Segment Imaging

      Explore Healio.com Ophthalmology
      Microscope-Integrated Intraoperative Ultrahigh-Speed Swept-Source Optical Coherence Tomography for Widefield Retinal and Anterior Segment Imaging
      ...the cover slip was 84%. The study was approved by the Tufts Medical Center institutional review board and the Massachusetts Institute of Technology Committee on the Use of Humans as Experimental Subjects. The research pr...
      Read Full Article
      Mentions: Massachusetts Institute of Technology James G. Fujimoto Thorlabs

    12. Temporal and Volumetric Denoising via Quantile Sparse Image (QuaSI) Prior in Optical Coherence Tomography and Beyond

      Explore arxiv.org
      Temporal and Volumetric Denoising via Quantile Sparse Image (QuaSI) Prior in Optical Coherence Tomography and Beyond
      This paper introduces an universal and structure-preserving regularization term, called quantile sparse image (QuaSI) prior. The prior is suitable for denoising images from various medical image modalities. We demonstrate its effectivness on volumetric optical coherence tomography (OCT) and computed tomography (CT) data, which show differnt noise and image characteristics. OCT offers high-resolution scans of the human retina but is inherently impaired by speckle noise. CT on the other hand has ...
      Read Full Article
      Mentions: Massachusetts Institute of Technology James G. Fujimoto University of Erlangen

    13. Radiometric model for coaxial single- and multimode optical emission from double-clad fiber

      Explore OSA | OSA Publishing
      Radiometric model for coaxial single- and multimode optical emission from double-clad fiber
      Double-clad fibers (DCFs) are versatile waveguides supporting a single-mode core surrounded by a multimode inner cladding. DCFs are increasingly used for multimodal biomedical applications, such as imaging or therapy, for which the core is typically used for coherent illumination and the inner cladding, to support a concurrent modality. Proper optimization is, however, critical to ensure high optical performance and requires accurate modeling of coaxial single- and multimode output beams. In ...
      Read Full Article
      Mentions: Brett E. Bouma Massachusetts Institute of Technology Massachusetts General Hospital

    15. Post-doctoral Associate Position in Biophotonics / Biomedical Optical Imaging at Lehigh University

      Explore Optical Coherence Tomography News Jobs & Studentships
      Post-doctoral Associate Position in Biophotonics / Biomedical Optical Imaging at Lehigh University
      ...In August 2007, Dr. Zhou joined Professor James G. Fujimoto’s Laser Medicine and Medical Imaging Group at the Massachusetts Institute of Technology (MIT) as a postdoctoral associate. Since then, he has been working on th...
      Read Full Article
      Mentions: Massachusetts Institute of Technology National Institutes of Health James G. Fujimoto

    16. Cycloid scanning for wide field optical coherence tomography endomicroscopy and angiography in vivo

      Explore OSA | OSA Publishing Gastroenterology , Probes
      Cycloid scanning for wide field optical coherence tomography endomicroscopy and angiography in vivo
      Devices that perform wide field-of-view (FOV) precision optical scanning are important for endoscopic assessment and diagnosis of luminal organ disease such as in gastroenterology. Optical scanning for in vivo endoscopic imaging has traditionally relied on one or more proximal mechanical actuators, limiting scan accuracy and imaging speed. There is a need for rapid and precise two-dimensional (2D) microscanning technologies to enable the translation of benchtop scanning microscopies to in vivo ...
      Read Full Article
      Mentions: Johns Hopkins University Massachusetts Institute of Technology James G. Fujimoto
    17. 1-15 of 571 1 2 3 4 ... 36 37 38 »
  1. Search:

  2. 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

  4. About Massachusetts Institute of Technology

    Massachusetts Institute of Technology

    Massachusetts Institute of Technology (MIT) is a private, coeducational research university located in Cambridge, Massachusetts. MIT has five schools and one college, containing 32 academic departments, with a strong emphasis in theoretical, applied, and interdisciplinary scientific and technological research.  Laser Medicine and Medical Imaging Group at MIT.  The RLE Laser Medicine and Medical Imaging Group and its close collaborators were the originators of optical coherence tomography (OCT), a diagnostic technology now used in a growing number of medical fields. The group currently works to further understand and exploit the capabilities of OCT technology, with ongoing investigations in topics related to optical coherence microscopy development and optical biopsy using OCT.

  5. Related Topics

    1. High speed engine gas thermometry by Fourier-domain mode-locked laser absorption spectroscopy
      371 articles also mentioned James G. Fujimoto
    2. Power-efficient nonreciprocal interferometer and linear-scanning fiber-optic catheter for optical coherence tomography.
      119 articles also mentioned Harvard University
    3. Photoreceptor Disruption Secondary to Posterior Vitreous Detachment as Visualized Using High-Speed Ultrahigh-Resolution Optical Coherence Tomography
      117 articles also mentioned Tufts University
    4. Method and apparatus for performing optical measurements
      80 articles also mentioned Joel S. Schuman
    5. Method and apparatus for optical coherence tomographic fundus imaging without vignetting
      76 articles also mentioned Carl Zeiss Meditec