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Simultaneous spatial and spectral selective excitation
Author(s) -
Meyer Craig H.,
Pauly John M.,
Macovskiand Albert,
Nishimura Dwight G.
Publication year - 1990
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1910150211
Subject(s) - excitation , pulse (music) , pulse sequence , k space , nuclear magnetic resonance , multislice , physics , amplitude , optics , acoustics , materials science , quantum mechanics , fourier transform , detector
Using a k‐space interpretation of small‐tip excitation, a single excitation pulse has been designed that is simultaneously selective in space and resonant frequency. An analytic expression for the response of this pulse has been derived. The pulse has been implemented on a 1.5‐T imaging system. The pulse has been applied to a rapid gradient‐echo imaging sequence that forms both water and fat images within a breath‐holding interval. These rapid images are free of the chemical shift artifacts at organ boundaries that typically afflict conventional rapid images. The pulse can be applied to a variety of other sequences, such as multislice water/fat sequences and rapid k‐space scanning. © 1990 Academic Press, Inc.