Slice-selective tunable-flip adiabatic low peak-power excitation pulse.

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Priti BalchandaniDaniel Spielman

Abstract

Adiabatic pulses are useful in achieving uniform excitation profiles in the presence of B(1)-inhomogeneity. At higher fields, this inhomogeneity becomes more severe, further amplifying the need for B(1)-insensitive excitation. Although gradient modulation techniques for slice-selective adiabatic excitation have been introduced, a pulse that falls within the gradient and RF amplifier limits for most commercial human scanners is currently unavailable. In this work, we present an alternative gradient modulated approach for pulse design that achieves adiabatic slice selection with significantly lower RF peak power requirements. The resulting Slice-selective Tunable-flip AdiaBatic Low peak-power Excitation (STABLE) pulse consists of an oscillating gradient in conjunction with a BIR-4-like RF envelope that is sampled by many short spatial subpulses to achieve spatial selectivity. Simulations show that the expected spatial profile as well as the off-resonance behavior of the pulse remain invariant for a range of B(1) values. Phantom and in vivo results demonstrate the adiabaticity and slice selectivity of the STABLE pulse.

References

May 1, 1990·Investigative Radiology·R S StaewenM Garwood
May 1, 1996·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·R A de GraafM Garwood
Aug 14, 1998·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·E W HsuJ R MacFall
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Mar 31, 2005·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Shalom MichaeliMichael Garwood

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Citations

May 17, 2005·Radiologic Clinics of North America·Philipp LangHiroshi Yoshioka
Dec 20, 2011·Journal of Magnetic Resonance·Jay MooreJohn C Gore
Dec 20, 2011·Journal of Magnetic Resonance·Jay MooreJohn C Gore
Jan 28, 2009·Journal of Magnetic Resonance·Nicolas Boulant
Oct 7, 2010·NMR in Biomedicine·D W J KlompP R Luijten
Oct 18, 2012·NMR in Biomedicine·C S Arteaga de CastroD W J Klomp
Jan 4, 2012·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Irene M L van KalleveenDennis W J Klomp
Apr 23, 2013·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Meijin LinShaolin Yang
Jan 26, 2010·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Jiang DuGraeme M Bydder
Feb 13, 2013·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Priti BalchandaniDaniel Spielman
Mar 26, 2009·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Sonal JosanKim Butts Pauly
Dec 2, 2015·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Hadrien Dyvorne, Priti Balchandani

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