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    1. Mentioned In 106 Articles

    2. Refractive-index matching enhanced polarization-sensitive optical coherence tomography quantification in human brain tissue

      Refractive-index matching enhanced polarization-sensitive optical coherence tomography quantification in human brain tissue
      The importance of polarization-sensitive optical coherence tomography (PS-OCT) has been increasingly recognized in human brain imaging. Despite the recent progress of PS-OCT in revealing white matter architecture and orientation, quantification of fine-scale fiber tracts in the human brain cortex has been a challenging problem, due to a low birefringence in the gray matter. In this study, we investigated the effect of refractive index matching by 2,2'-thiodiethanol (TDE) immersion ...
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    3. MGH Receives NIH Grant for Assessing Airway Smooth Muscle Tone in Asthma with Endobronchial Optical Coherence Tomography

      MGH Receives NIH Grant for Assessing Airway Smooth Muscle Tone in Asthma with Endobronchial Optical Coherence Tomography
      ...e of the key progenitors of OCT technology and translational OCT. Dr. Kenneth Lutchen, a secondary mentor, of Boston University is a pioneer in the development of experiments aimed at investigating lung physiology, and s...
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    4. Deep Learning in Biomedical Optics

      Deep Learning in Biomedical Optics
      This article reviews deep learning applications in biomedical optics with a particular emphasis on image formation. The review is organized by imaging domains within biomedical optics and includes microscopy, fluorescence lifetime imaging, in vivo microscopy, widefield endoscopy, optical coherence tomography, photoacoustic imaging, diffuse tomography, and functional optical brain imaging. For each of these domains, we summarize how deep learning has been applied and highlight methods by which deep learning can ...
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    5. Scalable mapping of myelin and neuron density in the human brain with micrometer resolution

      Scalable mapping of myelin and neuron density in the human brain with micrometer resolution
      Optical Coherence Tomography (OCT) is an emerging 3D imaging technique that allows quantification of intrinsic optical properties such as scattering coefficient and back-scattering coefficient, and has proved useful in distinguishing delicate microstructures in the human brain. The origins of scattering in brain tissues are contributed by the myelin content, neuron size and density primarily; however, no quantitative relationships between them have been reported, which hampers the use of OCT in ...
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    6. Imaging localized fast optical signals of neural activation with optical coherence tomography in awake mice

      Imaging localized fast optical signals of neural activation with optical coherence tomography in awake mice
      We report optical coherence tomography (OCT) imaging of localized fast optical signals (FOSs) arising from whisker stimulation in awake mice. The activated voxels were identified by fitting the OCT intensity signal time course with a response function over a time scale of a few hundred milliseconds after the whisker stimulation. The significantly activated voxels were shown to be localized to the expected brain region for whisker stimulation. The ability to ...
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    7. Measuring myelin content and cell density in the human brain using optical coherence tomography

      Measuring myelin content and cell density in the human brain using optical coherence tomography
      Serial Sectioning Optical Coherence Tomography(serial sectioning OCT) has been widely used to investigate the structural and pathological features of brain samples. OCT is an optical imaging technique that provides both the 3D structure of the tissue as well as the optical properties including the scattering coefficient ( s ) and back-scattering coefficient ( b ). Serial sectioning OCT allows the reconstruction of distortion-free volumetric images at high contrast and high resolution, which has ...
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    8. Advanced endoscopic imaging for detecting and guiding therapy of early neoplasias of the esophagus

      Advanced endoscopic imaging for detecting and guiding therapy of early neoplasias of the esophagus
      Esophageal cancers, largely adenocarcinoma in Western countries and squamous cell cancer in Asia, present a significant burden of disease and remain one of the most lethal of cancers. Key to improving survival is the development and adoption of new imaging modalities to identify early neoplastic lesions, which may be small, multifocal, subsurface, and difficult to detect by standard endoscopy. Such advanced imaging is particularly relevant with the emergence of ablative ...
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    9. Improving the characterization of ex vivo human brain optical properties using high numerical aperture optical coherence tomography by spatially constraining the confocal parameters

      Improving the characterization of ex vivo human brain optical properties using high numerical aperture optical coherence tomography by spatially constraining the confocal parameters
      Significance: The optical properties of biological samples provide information about the structural characteristics of the tissue and any changes arising from pathological conditions. Optical coherence tomography (OCT) has proven to be capable of extracting tissue's optical properties using a model that combines the exponential decay due to tissue scattering and the axial point spread function that arises from the confocal nature of the detection system, particularly for higher numerical ...
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    10. Massachusetts General Hospital Receives NIH Grant for Assessing Airway Smooth Muscle Tone in Asthma with Endobronchial Optical Coherence Tomography

      Massachusetts General Hospital Receives NIH Grant for Assessing Airway Smooth Muscle Tone in Asthma with Endobronchial Optical Coherence Tomography
      ...e of the key progenitors of OCT technology and translational OCT. Dr. Kenneth Lutchen, a secondary mentor, of Boston University is a pioneer in the development of experiments aimed at investigating lung physiology, and s...
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    11. Visible light optical coherence tomography angiography (vis-OCTA) facilitates local microvascular oximetry in the human retina

      Visible light optical coherence tomography angiography (vis-OCTA) facilitates local microvascular oximetry in the human retina
      We report herein the first visible light optical coherence tomography angiography (vis-OCTA) for human retinal imaging. Compared to the existing vis-OCT systems, we devised a spectrometer with a narrower bandwidth to increase the spectral power density for OCTA imaging, while retaining the major spectral contrast in the blood. We achieved a 100 kHz A-line rate, the fastest acquisition speed reported so far for human retinal vis-OCT. We rigorously optimized the ...
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    12. Comparison of widefield swept-source optical coherence tomography angiography with ultra-widefield colour fundus photography and fluorescein angiography for detection of lesions in diabetic retinopathy

      Comparison of widefield swept-source optical coherence tomography angiography with ultra-widefield colour fundus photography and fluorescein angiography for detection of lesions in diabetic retinopathy
      Aims To compare widefield swept-source optical coherence tomography angiography (WF SS-OCTA) with ultra-widefield colour fundus photography (UWF CFP) and fluorescein angiography (UWF FA) for detecting diabetic retinopathy (DR) lesions. Methods This prospective, observational study was conducted at Massachusetts Eye and Ear from December 2018 to October 2019. Proliferative DR, non-proliferative DR and diabetic patients with no DR were included. All patients were imaged with a WF SS-OCTA using a Montage ...
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    13. Visible light optical coherence tomography angiography (vis-OCTA)

      Visible light optical coherence tomography angiography (vis-OCTA)
      We report herein the first visible light optical coherence tomography angiography (vis-OCTA) for human retinal imaging. Compared to the existing vis-OCT systems, we devised a spectrometer with a narrower bandwidth to increase the spectral power density for OCTA imaging, while retaining the major spectral contrast in the blood. We achieved a 100 kHz A-line rate, the fastest acquisition speed reported so far for human retinal vis-OCT. We rigorously optimized the ...
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    14. Insight into the fundamental trade-offs of diffusion MRI from polarization-sensitive optical coherence tomography in ex vivo human brain

      Insight into the fundamental trade-offs of diffusion MRI from polarization-sensitive optical coherence tomography in ex vivo human brain
      In the first study comparing high angular resolution diffusion MRI (dMRI) in the human brain to axonal orientation measurements from polarization-sensitive optical coherence tomography (PSOCT), we compare the accuracy of orientation estimates from various dMRI sampling schemes and reconstruction methods. We find that, if the reconstruction approach is chosen carefully, single-shell dMRI data can yield the same accuracy as multi-shell data, and only moderately lower accuracy than a full Cartesian-grid ...
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    15. 1-15 of 106 1 2 3 4 5 6 7 »
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  2. 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.