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Abstract #0411

An Approach to 3-Dimensional Multi-Band Acquisition

Bruno Riemenschneider1, Jakob Asslnder1, Jrgen Hennig1

1Dept. of Radiology, Medical Physics, University Medical Center Freiburg, Freiburg, Germany

Multi-band excitation in conjunction with a 3-dimensional read-out helps to overcome the limitation in number of slices that can be resolved with parallel imaging techniques. Other than slab-wise excitation, it leads to exploitation of the coil sensitivities in all three dimensions and inhomogeneities at the interface between adjacent slabs are avoided. The feasibility of the approach is demonstrated by a sample measurement with a 32-channel headcoil. The field of view of (0.192 m) with voxel size 3mm was measured in 400 ms.

Keywords

achieve achieved acquisition adjacent adjoining algebraically applied approaches array artifacts assembled avoided axis band best bottom brain carried chosen coil coils combines compromise conjugate conjunction consequently contiguous correction corresponds cost coverage covers degree dept derived desired dimensional dimensions distance distortions dwell every excitation excited exploits feasibility feasible field find forward fourth fraction full function furthermore gradient grid head helps identical implemented increasing induced influence inhomogeneities integer intensity interface interleaving knowledge latter lead like limitations limited linear long manner medical minimize mode needs neighboring noise optimized original others outs overcome parallel permit physics position posse process pulses radiology read realized reception reconstructed reconstruction reduction regional regularized relation repeating resolution resolved restricted sample saturation scaling scanner schematic segmented sensitivities shot shots significantly slab slabs slice slices space spatial spirals stack still strong suggest superimposed susceptibility susceptible take target temporal trajectories trajectory trio typical ultrafast uniform varying vertical view volume volumes whole wise years