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Fat-suppressed steady-state free precession imaging using phase detection

✍ Scribed by Brian A. Hargreaves; Shreyas S. Vasanawala; Krishna S. Nayak; Bob S. Hu; Dwight G. Nishimura

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
333 KB
Volume
50
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

Fully refocused steady‐state free precession (SSFP) is a rapid, efficient imaging sequence that can provide diagnostically useful image contrast. In SSFP, the signal is refocused midway between excitation pulses, much like in a spin‐echo experiment. However, in SSFP, the phase of the refocused spins alternates for each resonant frequency interval equal to the reciprocal of the sequence repetition time (TR). Appropriate selection of the TR results in a 180° phase difference between lipid and water signals. This phase difference can be used for fat–water separation in SSFP without any increase in scan time. The technique is shown to produce excellent non‐contrast‐enhanced, flow‐independent angiograms of the peripheral vasculature. Magn Reson Med 50:210–213, 2003. © 2003 Wiley‐Liss, Inc.

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