Parallel excitation for B-field insensitive fat-saturation preparation
Version of Record online: 13 JAN 2012
Copyright © 2012 Wiley Periodicals, Inc.
Magnetic Resonance in Medicine
Volume 68, Issue 2, pages 631–638, August 2012
How to Cite
Heilman, J. A., Derakhshan, J. D., Riffe, M. J., Gudino, N., Tkach, J., Flask, C. A., Duerk, J. L. and Griswold, M. A. (2012), Parallel excitation for B-field insensitive fat-saturation preparation. Magn Reson Med, 68: 631–638. doi: 10.1002/mrm.23238
- Issue online: 12 JUL 2012
- Version of Record online: 13 JAN 2012
- Manuscript Accepted: 7 SEP 2011
- Manuscript Revised: 22 AUG 2011
- Manuscript Received: 18 NOV 2010
- parallel transmit;
- fat saturation;
- transmit SENSE
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 B0 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.