Part of this article was presented at the 12th ISMRM meeting, Kyoto, 2004.
Fat/water separation in single acquisition steady-state free precession using multiple echo radial trajectories†
Article first published online: 10 OCT 2005
Copyright © 2005 Wiley-Liss, Inc.
Magnetic Resonance in Medicine
Volume 54, Issue 5, pages 1051–1057, November 2005
How to Cite
Lu, A., Grist, T. M. and Block, W. F. (2005), Fat/water separation in single acquisition steady-state free precession using multiple echo radial trajectories. Magn Reson Med, 54: 1051–1057. doi: 10.1002/mrm.20715
- Issue published online: 26 OCT 2005
- Article first published online: 10 OCT 2005
- Manuscript Accepted: 9 AUG 2005
- Manuscript Revised: 11 JUL 2005
- Manuscript Received: 14 JAN 2005
- NIH. Grant Number: 8 R01 EB002075–06
- The Whitaker Foundation
- General Electric Healthcare
- rapid imaging;
- fat/water separation;
- MR angiography;
- musculoskeletal imaging
Phase detection in fully refocused SSFP imaging has recently allowed fat/water separation without preparing the magnetization or using multiple acquisitions. Instead, it exploits the phase difference between fat and water at an echo time at the midpoint of the TR. To minimize the TR for improved robustness to B0 inhomogeneity, a 3D projection acquisition collecting two half echoes at the beginning and end of each excitation was previously implemented. Since echoes are not formed at the midpoint of the TR, this method still requires two passes of k-space for fat/water separation. A new method is presented to linearly combine the half echoes to separate fat and water in a single acquisition. Separation using phase detection provides superior contrast between fat and water voxels. Results from high resolution angiography and musculoskeletal studies with improved robustness to inhomogeneity and a 50% scan time reduction compared to the two pass method are presented. Magn Reson Med, 2005. © 2005 Wiley-Liss, Inc.