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Pulse imaging sequences and methods for T1p-weighted MRI

  • US 6,836,114 B2
  • Filed: 03/14/2003
  • Issued: 12/28/2004
  • Est. Priority Date: 03/15/2002
  • Status: Active Grant
First Claim
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1. A 2D multi-slice T

  • -weighted pulse sequence for magnetic resonance imaging, comprising in sequential order;

    a first radio frequency pulse for selectively exciting a band of spins;

    a second radio frequency pulse, wherein the second pulse is a spin-locking pulse divided into at least two segments, wherein the spin-locking segments have 90°

    alternating phase shift for spin-locking in a transverse plane of the spins;

    a third radio frequency slice-selective pulse, phase-shifted 180°

    from the first radio frequency pulse, which restores spin-locked magnetization to a longitudinal axis for imaging with any pulse sequence; and

    a strong crusher gradient applied to destroy residual transverse magnetization.

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