Abstract #3252

Half Fourier Acquisition Single Shot Turbo Spin Echo (HASTE) imaging using multiband (MB) excitation and Power Independent of Number of Slices (PINS) refocusing pulses at 3 Tesla

Jenni Schulz¹, Lauren J Bains¹, José P Marques¹, and David G Norris¹

¹Donders Institute for Cognitive Neuroimaging, Radboud University Nijmegen, Nijmegen, Netherlands

HASTE sequences have high RF power deposition which particularly limits their use at high resolutions and high field strengths. In this work, TRAPS and fixed SAR Power Independent of Number of Slices (PINS)-refocusing pulses were used to reduce the power deposition. Multiband excitation pulses were added to enable arbitrary user-defined slice orientations, with the added benefit of accelerating the acquisition due to the simultaneous excitation of multiple slices. Good image quality was obtained for a MB4-HASTE protocols with 3.1 and 1.1 mm resolution, and a whole-brain MB6-HASTE protocol with 1.1 mm resolution.

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