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Magn Reson Med. 2003 Nov;50(5):1100-6.

Variable-density spiral 3D tailored RF pulses.

Author information

1
Department of Radiology, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA. stengerva@msx.upmc.edu

Abstract

A variable-density spiral method is presented for reducing three-dimensional tailored radiofrequency pulse duration. Pulse length reductions of 21-32% are possible, with only a small error in the desired excitation profile. The method is demonstrated using simulations, phantom experiments, and T(2)*-weighted images of brain regions with susceptibility-induced intravoxel dephasing. Four 19.7-ms shots were needed to excite a 5-mm-thick slice with reduced susceptibility artifacts in the sinus region at 3T.

PMID:
14587022
PMCID:
PMC3040114
DOI:
10.1002/mrm.10623
[Indexed for MEDLINE]
Free PMC Article
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