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A study of optimization of the complex hyperbolic secant inversion pulses
Author(s) -
Mao Jintong,
Virapongse C.,
Fitzsimmons J. R.
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.1910130211
Subject(s) - inversion (geology) , conjugate , wafer , conjugate gradient method , amplitude , mathematics , mathematical analysis , hyperbolic function , physics , geology , algorithm , optics , paleontology , optoelectronics , structural basin
The conjugate gradient method is used to optimize the inversion slice profile produced by complex hyperbolic secant selective pulses. An improved quality is obtained for the inversion slice profile at a price, however, of a lower immunity to the amplitude variation of radiofrequency pulses.