1. Boston University

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    1. Mentioned In 74 Articles

    3. Single capillary oximetry and tissue ultrastructural sensing by dual-band dual-scan inverse spectroscopic optical coherence tomography

      Explore Light
      Single capillary oximetry and tissue ultrastructural sensing by dual-band dual-scan inverse spectroscopic optical coherence tomography
      Measuring capillary oxygenation and the surrounding ultrastructure can allow one to monitor a microvascular niche and better understand crucial biological mechanisms. However, capillary oximetry and pericapillary ultrastructure are challenging to measure in vivo. Here, we demonstrate a novel optical imaging system, Dual-band Dual-scan Inverse Spectroscopic Optical Coherence Tomography (D2- ISOCT), that, for the first time, can simultaneously obtain the following metrics in vivo using endogenous contrast: (1) capillary-level oxygen saturation ...
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      Mentions: Northwestern University Vadim Backman Boston University

    4. Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)

      Explore jove.com Ophthalmology
      Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)
      While fluorescence imaging is widely used in ophthalmology, a large field of view (FOV) three-dimensional (3D) fluorescence retinal image is still a big challenge with the state-of-the-art retinal imaging modalities because they would require z-stacking to compile a volumetric dataset. Newer optical coherence tomography (OCT) and OCT angiography (OCTA) systems overcome these restrictions to provide three-dimensional (3D) anatomical and vascular images, but the dye-free nature of OCT cannot visualize leakage ...
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      Mentions: Boston University Ji Yi

    5. Fiber-based visible and near infrared optical coherence tomography (vnOCT) enables quantitative elastic light scattering spectroscopy in human retina

      Explore OSA | OSA Publishing Ophthalmology
      Fiber-based visible and near infrared optical coherence tomography (vnOCT) enables quantitative elastic light scattering spectroscopy in human retina
      Elastic light scattering spectroscopy (ELSS) has been proven a powerful method in measuring tissue structures with exquisite nanoscale sensitivity. However, ELSS contrast in the living human retina has been relatively underexplored, primarily due to the lack of imaging tools with a large spectral bandwidth. Here, we report a simple all fiber-based setup to implement dual-channel visible and near infrared (NIR) optical coherence tomography (vnOCT) for human retinal imaging, bridging over ...
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      Mentions: Boston University Ji Yi

    7. Unified description of three-dimensional optical diffraction microscopy: from transmission microscopy to optical coherence tomography: tutorial

      Explore OSA | OSA Publishing
      Unified description of three-dimensional optical diffraction microscopy: from transmission microscopy to optical coherence tomography: tutorial
      In this tutorial, we present a general model linking the data provided by any optical diffraction microscope to the sample permittivity. Our analysis is applicable to essentially all microscope configurations, in transmission or reflection mode, using scanning or full-field illumination, with or without interferometric measurements. We include also a generalization of our analysis to vector fields.
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      Mentions: Boston University

    8. Measurement of shear-induced diffusion of red blood cells using dynamic light scattering-optical coherence tomography

      Explore SPIE Digital Library
      Measurement of shear-induced diffusion of red blood cells using dynamic light scattering-optical coherence tomography
      Dynamic Light Scattering-Optical Coherence Tomography (DLS-OCT) takes the advantages of using DLS to measure particle flow and diffusion within an OCT resolution-constrained 3D volume, enabling the simultaneous measurements of absolute RBC velocity and diffusion coefficient with high spatial resolution. In this work, we applied DLS-OCT to measure both RBC velocity and the shear-induced diffusion coefficient within penetrating venules of the somatosensory cortex of anesthetized mice. Blood flow laminar profile measurements ...
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      Mentions: Massachusetts General Hospital Harvard University Boston University

    9. In vivo broadband visible light optical coherence tomography probe enables inverse spectroscopic analysis

      Explore OSA | OSA Publishing Probes
      In vivo broadband visible light optical coherence tomography probe enables inverse spectroscopic analysis
      We report the design and characterization of a 6 mm outer diameter pull-back circumferential scanning visible optical coherence tomography probe. The probes large visible bandwidth (500695 nm) allowed for inverse spectroscopic analysis and an axial resolution of 1.1 m 1.1m in tissue. We verify spectral imaging capabilities by measuring microsphere backscattering spectra and demonstrate in vivo spatial nanoscale characterization of tissue.
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      Mentions: Northwestern University Vadim Backman Boston University

    10. Boston University Receives NIH Grant for Microscopic Imaging of Tissue Oxygen Delivery Altered by Microvascular Changes

      Explore Optical Coherence Tomography News Funding
      Boston University Receives NIH Grant for Microscopic Imaging of Tissue Oxygen Delivery Altered by Microvascular Changes
      ... compromise tissue oxygenation? We will then relate these findings to clinically relevant imaging biomarkers. Boston University Receives a 2017 NIH Grant for $162,682 for Microscopic Imaging of Tissue Oxygen Delivery Alt...
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      Mentions: National Institutes of Health Boston University David A. Boas

    11. Capillary red blood cell velocimetry by phase-resolved optical coherence tomography

      Explore OSA | OSA Publishing
      Capillary red blood cell velocimetry by phase-resolved optical coherence tomography
      We present a phase-resolved optical coherence tomography (OCT) method to extend Doppler OCT for the accurate measurement of the red blood cell (RBC) velocity in cerebral capillaries. OCT data were acquired with an M-mode scanning strategy (repeated A-scans) to account for the single-file passage of RBCs in a capillary, which were then high-pass filtered to remove the stationary component of the signal to ensure an accurate measurement of phase shift ...
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      Mentions: Massachusetts General Hospital Harvard University Boston University

    13. Oblique scanning laser microscopy for simultaneously volumetric structural and molecular imaging using only one raster scan

      Explore Nature Publishing Group
      Oblique scanning laser microscopy for simultaneously volumetric structural and molecular imaging using only one raster scan
      Multi-modal three dimensional (3D) optical imaging combining both structural sensitivity and molecular specificity is highly desirable in biomedical research. In this paper, we present a method termed oblique scanning laser microscopy (OSLM) to combine optical coherence tomography (OCT), for simultaneously volumetric structural and molecular imaging with cellular resolution in all three dimensions. Conventional 3D laser scanning fluorescence microscopy requires repeated optical sectioning to create z-stacks in depth. Here, the use ...
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      Mentions: Boston University Ji Yi

    14. Improving graph-based OCT segmentation for severe pathology in retinitis pigmentosa patients

      Explore Conference Proceedings Ophthalmology
      Improving graph-based OCT segmentation for severe pathology in retinitis pigmentosa patients
      Three dimensional segmentation of macular optical coherence tomography (OCT) data of subjects with retinitis pigmentosa (RP) is a challenging problem due to the disappearance of the photoreceptor layers, which causes algorithms developed for segmentation of healthy data to perform poorly on RP patients. In this work, we present enhancements to a previously developed graph-based OCT segmentation pipeline to enable processing of RP data. The algorithm segments eight retinal layers in ...
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      Mentions: Johns Hopkins University Boston University

    15. Optical coherence tomography for non-invasive examination and conservation of cultural heritage objects

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      Optical coherence tomography for non-invasive examination and conservation of cultural heritage objects
      Optical coherence tomography (OCT) has great potential for the examination of oil paintings, particularly for celebrated masterpieces by great artists in history. We developed an OCT system for large field of view (FOV), high definition (HD) imaging of oil paintings. To achieve large FOV, we translated the sample using a pair of high-precision linear motors and performed sequential volumetric imaging on adjacent, non-overlapping regions. Through 3D OCT imaging, the surface ...
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      Mentions: Boston University Xuan Liu Yi Yang

    16. High-definition optical coherence tomography imaging for noninvasive examination of heritage works

      Explore OSA | OSA Publishing Art
      High-definition optical coherence tomography imaging for noninvasive examination of heritage works
      Cultural heritage works, such as ancient murals and historical paintings, are examined routinely for the purpose of conservation. Previous works have applied optical coherence tomography (OCT), which is a three-dimensional (3D) microscopic imaging modality in the field of heritage works conservation. The data acquired by OCT provides both 3D surface information of the object and structure information underneath the surface. Therefore, cross-sectional information on the object can be utilized to ...
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      Mentions: Boston University Xuan Liu Yi Yang
    17. 1-15 of 74 1 2 3 4 5 »
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  4. About Boston University

    Boston University

    Boston University (BU) is a private research university located in Boston, Massachusetts, United States. With more than 3,000 faculty members and nearly 30,000 students, Boston University is the fourth-largest private university in the United States of America.  Boston University Medical Campus (BUMC) is located in the historic South End of Boston and comprises the Boston University School of Medicine, the Boston University School of Public Health, the Goldman School of Dental Medicine, and the Boston University Graduate School of Medical Sciences. Boston Medical Center is a private, not for profit, 581-licensed bed academic medical center located in Boston's historic South End. The hospital is the primary teaching affiliate for Boston University School of Medicine. Emphasizing community-based care, Boston Medical Center with its mission to provide consistently accessible health services to all is the largest safety net hospital in New England.

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