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Adiabatic water suppression using frequency selective excitation
Author(s) -
de Graaf Robin A.,
Nicolay Klaas
Publication year - 1998
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.1910400508
Subject(s) - adiabatic process , dephasing , excitation , bloch equations , excited state , nuclear magnetic resonance , physics , atomic physics , relaxation (psychology) , materials science , computational physics , condensed matter physics , psychology , social psychology , quantum mechanics , thermodynamics
A new method for B 1 ‐insensitive water suppression using adiabatic RF pulses is described. The transition zone of the inversion profile of adiabatic full passage (AFP) pulses is used for frequency‐selective excitation followed by dephasing of the excited water with magnetic field gradients. Several im provements of AFP pulses, which also have implications for other applications, are described. The technique was evalu ated by simulations based on the Bloch equations (including relaxation), in vitro experiments and an in vivo verification on neonatal and adult rat brain.