SSFP and GRE phase contrast imaging using a three-echo readout

Authors

  • Jon-Fredrik Nielsen,

    Corresponding author
    1. Magnetic Resonance Engineering Laboratory, Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California
    • Ming Hsieh Department of Electrical Engineering, University of Southern California, 3740 McClintock Ave, EEB400, Los Angeles, CA 90089-2564
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  • Krishna S. Nayak

    1. Magnetic Resonance Engineering Laboratory, Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California
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Abstract

A technique for rapid in-plane phase-contrast imaging with high signal-to-noise ratio (SNR) is described. Velocity-encoding is achieved by oscillating the readout gradient, such that each 2DFT phase-encode is acquired three times following a single RF slice-selective excitation. Three images are reconstructed, from which both flow velocity and local resonance offset are calculated. This technique is compatible with both gradient-recalled echo (GRE) and balanced steady-state free precession (SSFP) imaging using a single steady-state. The proposed technique enables 1D velocity mapping with 40% higher temporal resolution and 80% higher SNR, compared to conventional PC-MRI using bipolar velocity-encoding gradient pulses. Magn Reson Med, 2007. © 2007 Wiley-Liss, Inc.

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