1. Articles from Amr Elbasiony

    1-3 of 3
    1. Calibration and image processing devices, methods, and systems

      Calibration and image processing devices, methods, and systems

      In part, the invention relates to systems and methods of calibrating a plurality of frames generated with respect to a blood vessel as a result of a pullback of an intravascular imaging probe being pullback through the vessel. A calibration feature disposed in the frames that changes between a subset of the frames can be used to perform calibration. Calibration can be performed post-pullback. Various filters and image processing techniques can be used to identify one or more feature in the frames including, without limitation, a calibration feature, a guidewire, a side branch, a stent strut, a lumen of the ...

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      Mentions: Abbott
    2. Lumen morphology image reconstruction based on the scan line data of OCT

      Lumen morphology image reconstruction based on the scan line data of OCT

      A method and apparatus of automatically locating in an image of a blood vessel the lumen boundary at a position in the vessel and from that measuring the diameter of the vessel. From the diameter of the vessel and estimated blood flow rate, a number of clinically significant physiological parameters are then determined and various user displays of interest generated. One use of these images and parameters is to aid the clinician in the placement of a stent. The system, in one embodiment, uses these measurements to allow the clinician to simulate the placement of a stent and to determine ...

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      Mentions: Abbott
    3. Volumetric assessment of lesion severity with optical coherence tomography: relationship with fractional flow reserve

      Volumetric assessment of lesion severity with optical coherence tomography: relationship with fractional flow reserve

      Aims: Frequency-domain optical coherence tomography (FD-OCT) provides a rapid tomographic scan of a coronary vessel, with an accurate reconstruction of its lumen profile. An FD-OCT-based metric that corresponds more closely with physiological significance of lesions may enable more precise guidance of interventional procedures. The aim of this feasibility study was to evaluate a new method for quantifying coronary lesion severity that estimates hyperaemic flow resistance of branched vessel segments imaged by FD-OCT. Methods and results: An analytical flow model was developed that relates fractional flow reserve (FFR) to the vascular resistance ratio (VRR), a measure of blood flow resistance derived ...

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    1-3 of 3
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  2. Topics in the News

    1. (3 articles) Abbott
    2. (1 articles) University of Catania
    3. (1 articles) Ospedali Riuniti di Bergamo
    4. (1 articles) Case Western Reserve University
    5. (1 articles) Academic Medical Center at the University of Amsterdam
    6. (1 articles) University College London
    7. (1 articles) University of Cologne
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