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  • Title: Spin-locked balanced steady-state free-precession (slSSFP).
    Author: Witschey WR, Borthakur A, Elliott MA, Magland J, McArdle EL, Wheaton A, Reddy R.
    Journal: Magn Reson Med; 2009 Oct; 62(4):993-1001. PubMed ID: 19672947.
    Abstract:
    A spin-locked balanced steady-state free-precession (slSSFP) pulse sequence is described that combines a balanced gradient-echo acquisition with an off-resonance spin-lock pulse for fast MRI. The transient and steady-state magnetization trajectory was solved numerically using the Bloch equations and was shown to be similar to balanced steady-state free-precession (bSSFP) for a range of T(2)/T(1) and flip angles, although the slSSFP steady-state could be maintained with considerably lower radio frequency (RF) power. In both simulations and brain scans performed at 7T, slSSFP was shown to exhibit similar contrast and signal-to-noise ratio (SNR) efficiency to bSSFP, but with significantly lower power.
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