Journal
JOURNAL OF MAGNETIC RESONANCE
Volume 170, Issue 2, Pages 236-243Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmr.2004.06.017
Keywords
optimal control theory; broadband excitation; broadband inversion; BEBOP; BIBOP
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The design of broadband excitation and inversion pulses with compensation of B-1-field inhomogeneity is a long standing goal in high resolution NMR spectroscopy. Most optimization procedures used so far have been restricted to particular pulse families to keep the scale of the problem within manageable limits. This restriction is unnecessary using efficient numerical algorithms based on optimal control theory. A systematic study of rf-limited broadband excitation by optimized pulses and broadband inversion by optimized pulses with respect to bandwidth and B-1-field is presented. Upper limits on minimum pulse lengths are set for different degrees of pulse performance. (C) 2004 Elsevier Inc. All rights reserved.
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