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Single‐shot, B 1 ‐insensitive slice selection with a gradient‐modulated adiabatic pulse, BISS‐8
Author(s) -
de Graaf Robin A.,
Nicolay Klaas,
Garwood Michael
Publication year - 1996
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.1910350505
Subject(s) - adiabatic process , pulse (music) , excitation , wafer , optics , phase (matter) , nuclear magnetic resonance , physics , flip angle , selection (genetic algorithm) , materials science , imaging phantom , spectroscopy , atomic physics , computational physics , computer science , optoelectronics , magnetic resonance imaging , medicine , radiology , quantum mechanics , artificial intelligence , detector , thermodynamics
An adiabatic pulse has been developed to accomplish uniform slice‐selective excitation with a spatially inhomogeneous B 1 . This new pulse can generate a uniform, arbitrary flip angle that is determined by four adjustable phase shifts in the pulse. Self‐refocused slice selection is achieved by modulating a B o gradient in concert with the pulse frequency (or phase) modulation. B 1 ‐compensated, self‐refocused slice selection is demonstrated in computer simulations and phantom experiments using a surface transmitter/receiver coil. This adiabatic pulse can provide optimal performance in multislice MRI and localized spectroscopy when transmitting with an inhomogeneous B 1 .