B0 shimming in human brain using rosette encoding at 7T
Jullie W Pan1, Chan H Moon2, and Hoby P Hetherington3,4
1Radiology, University of Missouri Columbia, Columbia, MO, United States, 2Radiology, University of Pittsburgh, Pittsburgh, PA, United States, 3Resonance Research Inc., Billerica, MA, United States, 4University of Missouri Columbia, Columbia, MO, United States
With increasing use of ultra-high field, there is a need for fast and efficient field mapping. Towards this purpose, the non-Cartesian circular rosette trajectory is advantageous due to its low gradient demands and its efficiency due to the simultaneous acquisition of spatial and field encoding information. We describe the implementation of the circular rosette trajectory for field mapping at 7T in the human brain and compare this to the highly accurate although slow 5 echo Bolero field map.
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