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Spin-locked balanced steady-state free-precession (slSSFP)

✍ Scribed by Walter R.T. Witschey; Ari Borthakur; Mark A. Elliott; Jeremy Magland; Erin L. McArdle; Andrew Wheaton; Ravinder Reddy

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
756 KB
Volume
62
Category
Article
ISSN
0740-3194

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✦ Synopsis

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. Magn Reson Med, 2009. © 2009 Wiley‐Liss, Inc.

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