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  • Patent number: 5957843
    Abstract: Flyback imaging is combined with echo planar imaging (EPI) for improved readout flow properties. For increases in imaging time of 50% or less, significant improvements in imaging are realized. The partial flyback improves partial-Fourier EPI and inside-out EPI and can be applied to any EPI trajectory.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: September 28, 1999
    Assignee: Board of Trustees of the Leland Stanford Junior University
    Inventors: Gerard T. Luk Pat, Craig H. Meyer, John M. Pauly, Dwight G. Nishimura
  • Patent number: 6957097
    Abstract: Pulsatile flow is measured using magnetic resonance imaging without cardiac gating using a phase-contrast excitation method to rapidly quantify blood flow and using a spiral k-space trajectory for image data read-out to mitigate deleterious effects of pulsatility. Post-processing of the read-out data provides a cumulative-average velocity plot from which a period of a cardiac cycle is obtained. Time-averaged blood flow rates can be rapidly and robustly measured and is more repeatable than conventional gated techniques.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: October 18, 2005
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Jong B. Park, Dwight B. Nishimura