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Abstract #2661

Dynamic Multiband Calibration for Improved Signal Fidelity

Steen Moeller1, Edward J. Auerbach1, Junqian Xu1, Christophe Lenglet1, kamil Ugurbil1, Essa S. Yacoub1

1Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States

The sensitivity of multiband separation to changes in the relative phase between simultaneously acquired slices is demonstrated. A phase estimation procedure is proposed and tested for a diffusion weighted acquisition. With a phase-updating strategy reduced signal fluctuations allows for improved detectability.

Keywords

ability acceleration accelerations accurate acquisition acquisitions added adding additional advantages affect aliased anatomy applied attention background band blue calibration channel coil combination correct corrected correlation detect detection diffusion distortions dynamic eddy estimation existence experiment explicit fiber fibers fidelity fluctuation fluctuations foundation function geometric gradient head human implementation importance imposed improved improvements improving individual intensity irrespective iteratively kernel kernels knowledge leading longitudinal magnitude mapping maps measured motion multiplication neuronal oblique orientation original parallel particular penalties plotted preferred prior profiles project quantification quantitative received recent reconstructed reconstruction reduce reduced reduction relies renewed representative resting semi sense sensitivities sensitivity separation series significantly simulated simulation simulations simultaneous simultaneously since slice slices space subsequent successive superior supporting temporal uncertainties uncertainty update updated usually variability versus volume volumes whereby