Parallel excitation for B-field insensitive fat-saturation preparation

Jeremiah A. Heilman, Jamal D. Derakhshan, Matthew J. Riffe, Natalia Gudino, Jean Tkach, Chris A. Flask, Jeffrey L. Duerk, Mark A. Griswold

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Multichannel transmission has the potential to improve many aspects of MRI through a new paradigm in excitation. In this study, multichannel transmission is used to address the effects that variations in B0 homogeneity have on fat-saturation preparation through the use of the frequency, phase, and amplitude degrees of freedom afforded by independent transmission channels. B1 homogeneity is intrinsically included via use of coil sensitivities in calculations. A new method, parallel excitation for B-field insensitive fat-saturation preparation, can achieve fat saturation in 89% of voxels with Mz ≤ 0.1 in the presence of ±4 ppm B 0 variation, where traditional CHESS methods achieve only 40% in the same conditions. While there has been much progress to apply multichannel transmission at high field strengths, particular focus is given here to application of these methods at 1.5 T. Magn Reson Med, 2012. © 2012 Wiley Periodicals, Inc.

Original languageEnglish
Pages (from-to)631-638
Number of pages8
JournalMagnetic resonance in medicine
Volume68
Issue number2
DOIs
StatePublished - Aug 1 2012
Externally publishedYes

Keywords

  • fat saturation
  • parallel transmit
  • transmit SENSE

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    Heilman, J. A., Derakhshan, J. D., Riffe, M. J., Gudino, N., Tkach, J., Flask, C. A., Duerk, J. L., & Griswold, M. A. (2012). Parallel excitation for B-field insensitive fat-saturation preparation. Magnetic resonance in medicine, 68(2), 631-638. https://doi.org/10.1002/mrm.23238