1. Articles from Utkarsh Sharma

    1-5 of 5
    1. Enhanced vessel characterization in optical coherence tomograogphy angiography

      Enhanced vessel characterization in optical coherence tomograogphy angiography

      Systems and methods to improve the visualization of vasculature in OCT angiography data are presented. In one embodiment, vessels having a particular orientation relative to one or more reference surfaces are highlighted. In another embodiment, the path of individual vessels can be analyzed to determine how many or what layers the vessels traverse. In another embodiment, regions which are typically not vascularized are analyzed for the presence of vessels. Techniques to minimize the impact of shadow artifacts are also presented and can be applied to any of the visualization approaches for further enhancement.

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    2. Methods and systems for combined morphological and angiographic analyses of retinal features

      Methods and systems for combined morphological and angiographic analyses of retinal features

      Methods and systems in ophthalmic imaging are presented that increase the sensitivity of automated diagnoses by the use of a combination of both functional and structural information derived from a variety of ophthalmic imaging modalities. An example method to analyze image data of an eye of a patient includes processing a first image dataset to obtain one or more functional metrics; processing a second image dataset to obtain one or more structural metrics; comparing the one or more structural metrics to the one or more functional metrics; and processing the results of said comparison to derive the probability of a ...

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    3. Acquisition and analysis techniques for improved outcomes in optical coherence tomography angiography

      Acquisition and analysis techniques for improved outcomes in optical coherence tomography angiography

      Methods for improved acquisition and processing of optical coherence tomography (OCT) angiography data are presented. One embodiment involves improving the acquisition of the data by evaluating the quality of different portions of the data to identify sections having non-uniform acquisition parameters or non-uniformities due to opacities in the eye such as floaters. The identified sections can then be brought to the attention of the user or automatically reacquired. In another embodiment, segmentation of layers in the retina includes both structural and flow information derived from motion contrast processing. In a further embodiment, the health of the eye is evaluating by ...

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    4. Systems and methods for spectrally dispersed illumination optical coherence tomography

      Systems and methods for spectrally dispersed illumination optical coherence tomography

      Systems and methods are presented for acquisition and processing of spectrally dispersed illumination optical coherence tomographic data. Light from a source is distributed spectrally on the sample, and each acquisition simultaneously provides partial spectral interference information from multiple locations in the sample. Thus for a given spatial point, a single observation will be of a partial spectrum A-scan. When multiple partial spectrum A-scan observations are made at the same point by shifting the spectrum of light on to the tissue, the point can be observed by the entire broadband spectrum of the light source, thereby making it possible to create ...

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    5. Inter-frame complex OCT data analysis techniques

      Inter-frame complex OCT data analysis techniques

      Techniques for collecting and processing complex OCT data to detect localized motion contrast information with enhanced accuracy and sensitivity are presented. In a preferred embodiment, vector differences between complex OCT signals taken at the same location on the sample are used to detect blood flow in the retina. Additional embodiments involving non-linear intensity weighting of the motion contrast information, normalization of the vector difference amplitudes, and calculating the absolute value of the standard deviation of Doppler signal are described. Image processing techniques to enhance the images resulting from these motion contrast techniques are also presented.

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    1-5 of 5
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  2. Topics in the News

    1. (5 articles) Utkarsh Sharma
    2. (5 articles) Carl Zeiss Meditec
    3. (2 articles) Mary K. Durbin
    4. (2 articles) University of Rochester
    5. (1 articles) Tilman Schmoll
    6. (1 articles) Lin An
    7. (1 articles) Matthew J. Everett
    8. (1 articles) Lingfeng Yu
    9. (1 articles) Scott A. Meyer
    10. (1 articles) Centre Hospitalier Intercommunal de Créteil
    11. (1 articles) Mount Sinai School of Medicine
    12. (1 articles) Geunyoung Yoon
    13. (1 articles) Eric H. Souied
    14. (1 articles) Francesco Bandello
    15. (1 articles) Egidijus Auksorius
    16. (1 articles) Maciej Wojtkowski
    17. (1 articles) Giuseppe Querques
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