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Abstract #2908

Minimum-Duration Adiabatic Spectral-Spatial Refocusing Pulses

Adam B. Kerr1, Duan Xu2, Peder E.Z. Larson2, Daniel B. Vigneron2, John M. Pauly1

1Electrical Engineering, Stanford University, Stanford, CA, United States; 2Radiology & Biomedical Imaging, UCSF, San Francisco, CA, United States

Minimum-duration adiabatic spectral-spatial refocusing pulses are designed by using an alternate frequency sweep than the conventional hyperbolic secant pulse. A 55% reduction in pulse duration from 26 to 11.7 ms is demonstrated, at the cost of higher SAR and larger spectral transition bands. This approach will provide a significant decrease in the minimum TE for PRESS-localized MRSI sequences that use two of these pulses.