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Application of self‐refocusing band selective RF pulses for spectroscopic localization
Author(s) -
Marshman Margaret F.,
Brereton Ian M.,
Rose Stephen E.,
O'Connor Anthony J.,
Doddrell David M.
Publication year - 1992
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.1910250204
Subject(s) - pulse sequence , pulse (music) , sequence (biology) , physics , power (physics) , nuclear magnetic resonance , rf power amplifier , optics , computer science , chemistry , optoelectronics , quantum mechanics , amplifier , biochemistry , cmos , detector
A new self‐refocusing slice selection 90° pulse is presented and its incorporation in the Space localization sequence described. Experimental comparisons are made with the self‐refocusing pulse reported by Geen (H. Geen, S. Wimperis and R. Freeman, J. Magn. Reson. 85, 620 (1990)). The main source of localization error in the Space sequence is traced to the hard π/2 pulse and the development of a shaped‐pulse version of the sequence is described. This required the calculation of a slice‐selective pulse capable of rotating coherent transverse magnetization to the z ‐axis. The RF power requirements for these experiments are also discussed. © 1992 Academic Press, Inc.