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  Adiabatic radiofrequency pulse forms in biomedical nuclear magnetic resonance

Norris, D. G. (2002). Adiabatic radiofrequency pulse forms in biomedical nuclear magnetic resonance. Concepts in Magnetic Resonance, 14(2), 89-101. doi:10.1002/cmr.10007.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-9AFA-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-4578-3
Genre: Journal Article

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 Creators:
Norris, David G.1, Author              
Affiliations:
1MPI of Cognitive Neuroscience (Leipzig, -2003), The Prior Institutes, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634574              

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 Abstract: Adiabatic radio frequency (RF) pulses are in widespread use in biomedical magnetic resonance imaging and spectroscopy. The primary advantage of adiabatic pulses is that provided the condition for adiabaticity is satisfied they can be made insensitive to inhomogeneities in the RF field. In this pedagogical article the principles of adiabatic fast passage (AFP) are explained, and the use of AFP to invert both stationary and flowing spin systems is examined. The hyperbolic secant pulse is presented as a pulse capable of performing slice selective adiabatic inversion. Lower power alternatives to this pulse are described, and the principle of offset independent constant adiabaticity is elucidated. Instantaneous reversal of the orientation of the effective RF field as a means of producing excitation and refocusing pulses is presented, as are methods of obtaining slice selective excitation with these pulses.

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Language(s): eng - English
 Dates: 2002
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 239635
ISI: 000174056300002
Other: P7022
DOI: 10.1002/cmr.10007
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Title: Concepts in Magnetic Resonance
  Other : Concepts Magn. Resonance
Source Genre: Journal
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Publ. Info: Hoboken, N.J. : Wiley
Pages: - Volume / Issue: 14 (2) Sequence Number: - Start / End Page: 89 - 101 Identifier: ISSN: 1043-7347
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000017210