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    1. Mentioned In 90 Articles

    2. Methodology for Image-driven High-resolution Additive Manufacturing Using Discretized Data Set

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      Methodology for Image-driven High-resolution Additive Manufacturing Using Discretized Data Set
      Additive manufacturing of patient-specific biomedical devices from 3D medical scans involves several steps of conversion which can introduce error into the final part. This is particularly critical to the fabrication of minute anatomical features, such as microvasculature. We show a direct conversion of the raw optical coherence tomography (OCT) volumetric data into photomasks in bitmap format, which streamlines the typical process steps used in 3D printing medical scans. OCT scans ...
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      Mentions: Northwestern University Cheng Sun

    4. Optical coherence tomography angiography of retinal vascular occlusions produced by imaging-guided laser photocoagulation

      Explore OSA | OSA Publishing
      Optical coherence tomography angiography of retinal vascular occlusions produced by imaging-guided laser photocoagulation
      Retinal vascular occlusive diseases represent a major form of vision loss worldwide. Rodent models of these diseases have traditionally relied upon a slit-lamp biomicroscope to help visualize the fundus and subsequently aid delivery of high-power laser shots to a target vessel. Here we describe a multimodal imaging system that can produce, image, and monitor retinal vascular occlusions in rodents. The system combines a spectral-domain optical coherence tomography system for cross-sectional ...
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      Mentions: Northwestern University Hao F. Zhang

    5. Biological tissue analysis by inverse spectroscopic optical coherence tomography

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      Biological tissue analysis by inverse spectroscopic optical coherence tomography
      A method and system to measure and image the full optical scattering properties by inverse spectroscopic optical coherence tomography (ISOCT) is disclosed. Tissue is modeled as a medium with continuous refractive index (RI) fluctuation and such a fluctuation is described by the RI correlation functions. By measuring optical quantities of tissue (including the scattering power of the OCT spectrum, the reflection albedo .alpha. defined as the ratio of scattering coefficient ...
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      Mentions: Northwestern University Vadim Backman Ji Yi

    6. Northwestern University Receives NIH Grant for Oxygen Delivery and Metabolism in Diabetic Retinopathy Using Visible-Light Optical Coherence Tomography

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      Northwestern University Receives NIH Grant for Oxygen Delivery and Metabolism in Diabetic Retinopathy Using Visible-Light Optical Coherence Tomography
      ... and inform future strategies for improved monitoring of the functional status of the retina in DR in humans. Northwestern University Receives a 2017 NIH Grant for $48,576 for Oxygen Delivery and Metabolism in Diabetic R...
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      Mentions: National Institutes of Health Northwestern University

    7. Colposcopic imaging using visible-light optical coherence tomography

      Explore SPIE | Journal Gynecology
      Colposcopic imaging using visible-light optical coherence tomography
      High-resolution colposcopic optical coherence tomography (OCT) provides key anatomical measures, such as thickness and minor traumatic injury of vaginal epithelium, of the female reproductive tract noninvasively. This information can be helpful in both fundamental investigations in animal models and disease screenings in humans. We present a fiber-based visible-light OCT and two probe designs for colposcopic application. One probe conducts circular scanning using a DC motor, and the other probe is ...
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      Mentions: Northwestern University Hao F. Zhang Cheng Sun

    9. Devices, methods, and systems of functional optical coherence tomography

      Explore uspto.gov Ophthalmology , Patents
      Devices, methods, and systems of functional optical coherence tomography
      The present disclosure provides systems and methods for the determining a rate of change of one or more analyte concentrations in a target using non invasive non contact imaging techniques such as OCT. Generally, OCT data is acquired and optical information is extracted from OCT scans to quantitatively determine both a flow rate of fluid in the target and a concentration of one or more analytes. Both calculations can provide ...
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      Mentions: Northwestern University Vadim Backman Ji Yi

    10. Retinal oximetry in humans using visible-light optical coherence tomography [Invited]

      Explore OSA | OSA Publishing Ophthalmology
      Retinal oximetry in humans using visible-light optical coherence tomography [Invited]
      We measured hemoglobin oxygen saturation (sO 2 ) in the retinal circulation in healthy humans using visible-light optical coherence tomography (vis-OCT). The measurements showed clear oxygenation differences between central retinal arteries and veins close to the optic nerve head. Spatial variations at different vascular branching levels were also revealed. In addition, we presented theoretical and experimental results to establish that noises in OCT intensity followed Rice distribution. We used this knowledge ...
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      Mentions: Northwestern University Hao F. Zhang

    12. Feature Of The Week 10/16/2016: Real-time Functional Analysis of Inertial Microfluidic Devices via Spectral Domain Optical Coherence Tomography

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      Feature Of The Week 10/16/2016: Real-time Functional Analysis of Inertial Microfluidic Devices via Spectral Domain Optical Coherence Tomography
      ...tial microfluidic particle sorting devices. For more information see recent Article . Courtesy Cheng Sun from Northwestern University . Inertial microfluidic devices have recently attracted considerable interest due to t...
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      Mentions: Northwestern University Ji Yi Hao F. Zhang

    13. Real-time Functional Analysis of Inertial Microfluidic Devices via Spectral Domain Optical Coherence Tomography

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      Real-time Functional Analysis of Inertial Microfluidic Devices via Spectral Domain Optical Coherence Tomography
      We report the application of spectral-domain optical coherence tomography (SD-OCT) technology that enables real-time functional analysis of sorting microparticles and cells in an inertial microfluidic device. We demonstrated high-speed, high-resolution acquisition of cross-sectional images at a frame rate of 350Hz, with a lateral resolution of 3m and an axial resolution of 1m within the microfluidic channel filled with water. We analyzed the temporal sequence of cross-sectional SD-OCT images to determine ...
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      Mentions: Northwestern University Ji Yi Hao F. Zhang

    14. Choroidal Findings in Eyes With Birdshot Chorioretinitis Using Enhanced-Depth Optical Coherence Tomography

      Explore IOVS Journal Ophthalmology
      Choroidal Findings in Eyes With Birdshot Chorioretinitis Using Enhanced-Depth Optical Coherence Tomography
      Purpose : The purposes of this study were to describe choroidal findings observed using optical coherence tomography with enhanced depth imaging (EDI-OCT) in eyes with birdshot chorioretinitis (BSCR) and to test the hypothesis that these findings are related to participant demographics, clinical characteristics, and treatment. Methods : In a multicenter, cross-sectional study, 172 eyes of 86 individuals with BSCR underwent a standardized clinical evaluation, including defined protocols for EDI-OCT imaging, with macular ...
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      Mentions: Johns Hopkins University Duke University Northwestern University

    15. Detection of extracellular matrix modification in cancer models with inverse spectroscopic optical coherence tomography

      Explore IOPscience Oncology
      Detection of extracellular matrix modification in cancer models with inverse spectroscopic optical coherence tomography
      In cancer biology, there has been a recent effort to understand tumor formation in the context of the tissue microenvironment. In particular, recent progress has explored the mechanisms behind how changes in the cell-extracellular matrix ensemble influence progression of the disease. The extensive use of in vitro tissue culture models in simulant matrix has proven effective at studying such interactions, but modalities for non-invasively quantifying aspects of these systems are ...
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      Mentions: Northwestern University Vadim Backman University of Minnesota

    16. Optical coherence photoacoustic microscopy

      Explore uspto.gov Microscopy , Patents
      Optical coherence photoacoustic microscopy
      A system and method for providing an optical coherence photoacoustic (OC-PAM) microscopy. An OC-PAM microscope includes a light source that outputs light, a scanner, a detector, a transducer, and an image processing module. The scanner receives the light and scans the light across a sample. The detector receives reflected light from the sample in response to the scanned light. The transducer detects photoacoustic waves induced in the sample by the ...
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      Mentions: Shuliang Jiao Northwestern University
    17. 1-15 of 90 1 2 3 4 5 6 »
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  4. About Northwestern University

    Northwestern University

    Northwestern University is a private research university located in Evanston, Illinois and downtown Chicago, Illinois.  Several of Northwestern's professional schools such as the School of Law, the Feinberg School of Medicine, and parts of the Kellogg School of Management are located in the Streeterville neighborhood of downtown Chicago. 

    Biophotonics Laboratory at Northwestern University.  The main direction of the Biophotonics laboratory (Principal Investigator: Prof. Vadim Backman) is the development of novel optical spectral and imaging techniques for non-invasive screening, diagnosis and detection of disease as well as characterization of biological and bioengineered tissue.

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