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- Title
B<sub>0</sub> mapping using rewinding trajectories (BMART).
- Authors
Baron, Corey A.; Nishimura, Dwight G.
- Abstract
Purpose To create a B0 map and correct for off-resonance with minimal scan time increase for two-dimensional (2D) or 3D non-Cartesian acquisitions. Methods Rewinding trajectories that bring the zeroth gradient moment to zero every repetition time (TR) were used to estimate the off-resonance with a center-out 3D cones trajectory, which required an increase in the minimum TR by 5%. The off-resonance estimation and correction was implemented using an algorithm based on binning and object-domain phase correction. B0 maps using BMART (B0 mapping using rewinding trajectories) were compared to maps obtained using separate scans with multiple echo time (TE) in a phantom and human brain. Results Excellent agreement between BMART and the multiple-TE method were observed, and images corrected with BMART were deblurred. Conclusion BMART can correct for off-resonance without requiring an additional scan, and can be easily applied to center-out or projection trajectories (2D or 3D). Magn Reson Med 78:664-669, 2017. © 2016 International Society for Magnetic Resonance in Medicine
- Publication
Magnetic Resonance in Medicine, 2017, Vol 78, Issue 2, p664
- ISSN
0740-3194
- Publication type
Article
- DOI
10.1002/mrm.26391