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
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
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