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    1. Mentioned In 584 Articles

    2. Extended Coherence Length and Depth Ranging Using a Fourier-Domain Mode-Locked Frequency Comb and Circular Interferometric Ranging

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      Extended Coherence Length and Depth Ranging Using a Fourier-Domain Mode-Locked Frequency Comb and Circular Interferometric Ranging
      Fourier-domain mode locking has been a popular laser design for high-speed optical-frequency-domain imaging (OFDI), but achieving long coherence lengths, and therefore imaging range, has been challenging. The narrow linewidth of a Fourier-domain mode-locked (FDML) frequency-comb (FC) laser could provide an attractive platform for high-speed as well as long-range OFDI. Unfortunately, aliasing artifacts arising from signals beyond the principal measurement depth of the free spectral range have prohibited the use of ...
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      Mentions: Brett E. Bouma Massachusetts Institute of Technology Massachusetts General Hospital

    3. Summary of 6th International Meeting on OCT Angiography & Advances in OCT in Rome December 2018: A Tremendous Success

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      Summary of 6th International Meeting on OCT Angiography & Advances in OCT in Rome December 2018: A Tremendous Success
      On December 14 and 15 2018, over 1400 ophthalmologists participated in Rome at tha most important meeting on OCT and OCT Angiography. the 6th international meeting on OCT Angiography, advances in OCT . The organizer, Dr Lumbroso has, since he started to organize these meetings, a well-defined objective: informing ophthalmologist in any country on the new clinical possibilities of Ocular imaging. The policy is to invite the best speakers in the ...
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      Mentions: Philip J. Rosenfeld Massachusetts Institute of Technology James G. Fujimoto

    4. QUANTIFICATION OF RETINAL CAPILLARY NONPERFUSION IN DIABETICS USING WIDE-FIELD OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY

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      QUANTIFICATION OF RETINAL CAPILLARY NONPERFUSION IN DIABETICS USING WIDE-FIELD OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY
      Purpose: To combine advances in high-speed, wide-field optical coherence tomography angiography ( OCTA ) with image processing methods for semiautomatic quantitative analysis of capillary nonperfusion in patients with diabetic retinopathy (DR). Methods: Sixty-eight diabetic patients (73 eyes), either without retinopathy or with different degrees of retinopathy, were prospectively recruited for volumetric swept-source OCTA imaging using 12 mm 12 mm fields centered at the fovea. A custom, semiautomatic software algorithm was used to ...
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      Mentions: Massachusetts Institute of Technology James G. Fujimoto Andre J. Witkin

    5. A Mechanical Approach for Smooth Surface Fitting to Delineate Vessel Walls in Optical Coherence Tomography Images

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      A Mechanical Approach for Smooth Surface Fitting to Delineate Vessel Walls in Optical Coherence Tomography Images
      Automated analysis of vascular imaging techniques is limited by the inability to precisely determine arterial borders. Intravascular optical coherence tomography (OCT) offers unprecedented detail of artery wall structure and composition, but does not provide consistent visibility of the outer border of the vessel due to limited penetration depth. Existing interpolation and surface fitting methods prove insufficient to accurately fill the gaps between the irregularly-spaced and sometimes unreliably-identified visible segments of ...
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      Mentions: Brigham and Women’s Hospital Massachusetts Institute of Technology Harvard University

    6. Computer-Aided Analysis of Gland-Like Subsurface Hyposcattering Structures in Barrett’s Esophagus Using Optical Coherence Tomography

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      Computer-Aided Analysis of Gland-Like Subsurface Hyposcattering Structures in Barrett’s Esophagus Using Optical Coherence Tomography
      (1) Background: Barretts esophagus (BE) is a complication of chronic gastroesophageal reflux disease and is a precursor to esophageal adenocarcinoma. The clinical implication of subsurface glandular structures of Barretts esophagus is not well understood. Optical coherence tomography (OCT), also known as volumetric laser endomicroscopy (VLE), can assess subsurface glandular structures, which appear as subsurface hyposcattering structures (SHSs). The aim of this study is to develop a computer-aided algorithm and apply ...
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      Mentions: Massachusetts Institute of Technology James G. Fujimoto Harvard University

    7. Colocalization of neurons in optical coherence microscopy and Nissl-stained histology in Brodmann’s area 32 and area 21

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      Colocalization of neurons in optical coherence microscopy and Nissl-stained histology in Brodmann’s area 32 and area 21
      Optical coherence tomography is an optical technique that uses backscattered light to highlight intrinsic structure, and when applied to brain tissue, it can resolve cortical layers and fiber bundles. Optical coherence microscopy (OCM) is higher resolution (i.e., 1.25 m) and is capable of detecting neurons. In a previous report, we compared the correspondence of OCM acquired imaging of neurons with traditional Nissl stained histology in entorhinal cortex layer ...
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      Mentions: Massachusetts Institute of Technology Massachusetts General Hospital Boston University

    8. Optic axis mapping with catheter-based polarization-sensitive optical coherence tomography

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      Optic axis mapping with catheter-based polarization-sensitive optical coherence tomography
      Birefringence offers an intrinsic contrast mechanism related to the microstructure and arrangement of fibrillary tissue components. Here we present a reconstruction strategy to recover not only the scalar amount of birefringence, but also its optic axis orientation as a function of depth in tissue from measurements with catheter-based polarization-sensitive optical coherence tomography. A polarization symmetry constraint, intrinsic to imaging in the backscatter direction, facilitates the required compensation for wavelength-dependent transmission ...
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      Mentions: Brett E. Bouma Massachusetts Institute of Technology Massachusetts General Hospital

    9. Extended coherence length and depth ranging using a Fourier domain mode-locked frequency comb and circular interferometric ranging

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      Extended coherence length and depth ranging using a Fourier domain mode-locked frequency comb and circular interferometric ranging
      Fourier domain mode-locking (FDML) has been a popular laser design for high speed optical frequency domain imaging (OFDI) but achieving long coherence lengths, and therefore imaging range, has been challenging. The narrow instantaneous linewidth of a frequency comb (FC) FDML laser could provide an attractive platform for high speed as well as long range OFDI. Unfortunately, aliasing artifacts arising from signals beyond the principle measurement depth of the free spectral ...
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      Mentions: Brett E. Bouma Massachusetts Institute of Technology Massachusetts General Hospital

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

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      Post-doctoral Associate Position in Biophotonics / Biomedical Optical Imaging at Lehigh University
      ...ust 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...
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      Mentions: Massachusetts Institute of Technology National Institutes of Health James G. Fujimoto

    11. Feature Of The Week 10/08/2018: Clinical Utility of Ultrahigh-Speed Endoscopic Optical Coherence Tomography in Gastroenterology

      Explore Optical Coherence Tomography News Gastroenterology
      Feature Of The Week 10/08/2018: Clinical Utility of Ultrahigh-Speed Endoscopic Optical Coherence Tomography in Gastroenterology
      ...enesis. For more information see recent Article1 , Article2 , and Article3 . Courtesy Osman O. Ahsen from the Massachusetts Institute of Technology . Barrett’s esophagus (BE) surveillance is limited by biopsy sampling er...
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      Mentions: Massachusetts Institute of Technology James G. Fujimoto Thorlabs

    12. Assessment of Barrett’s esophagus and dysplasia with ultrahigh-speed volumetric en face and cross-sectional optical coherence tomography

      Explore thieme-connect.de Gastroenterology
      Assessment of Barrett’s esophagus and dysplasia with ultrahigh-speed volumetric en face and cross-sectional optical coherence tomography
      Background This study aimed to evaluate the use of ultrahigh-speed volumetric en face and cross-sectional optical coherence tomography (OCT) with micromotor catheters for the in vivo assessment of Barretts esophagus and dysplasia. Methods 74 OCT datasets with correlated biopsy/endoscopic mucosal resection histology (49 nondysplastic Barretts esophagus [NDBE], 25 neoplasia) were obtained from 14 patients with Barretts esophagus and a history of dysplasia and 30 with NDBE. The associations between ...
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      Mentions: Massachusetts Institute of Technology James G. Fujimoto Thorlabs

    15. 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 ...
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      Mentions: Brett E. Bouma Massachusetts Institute of Technology Massachusetts General Hospital
    17. 1-15 of 584 1 2 3 4 ... 37 38 39 »
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  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.

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