Fast broadband inversion by adiabatic pulses.
Despite the advantages of compensation for resonance offset and B1 inhomogeneity, adiabatic pulses are not yet in general use in high-resolution NMR, often because of the conception that these pulses require longer time or increased power to perform. We show that adiabatic pulses with tangential frequency sweeps and other frequency-modulation functions can be optimized to accomplish 13C and 1H broadband inversion using pulse lengths of 192 and 64 micro(s), respectively, at B1 strengths available with modern high-resolution probes.
Hwang
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TL
Department of Radiology and Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, 217 Traylor Building, Baltimore, Maryland, 21205, USA.
van Zijl
P C
PC
Garwood
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M
D000465:Algorithms; D002247:Carbon Isotopes; D004578:Electron Spin Resonance Spectroscopy; D006859:Hydrogen; D007089:Image Enhancement / Q000379:methods; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D012399:Rotation
D002247:Carbon Isotopes; D006859:Hydrogen