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Abstract #3475

Let's Do the Time Warp Again - Slice Profile Evolution of Adiabatic Pulses at 7 Tesla

Mathies Breithaupt1, Moritz Cornelius Berger1, Ann-Kathrin Homagk1, Wolfhard Semmler1, Michael Bock1, 2

1Dept. of Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany; 2Radiology - Medical Physics, University Hospital Freiburg, Freiburg, Germany

Adiabatic pulses are commonly used to overcome B1 inhomogeneity which is particularly important at ultra-high magnetic fields due to standing wave effects. In slice-selective adiabatic pulses, the frequency sweep causes Beff,z-dependent off-resonances leading to an asymmetric evolution of the slice profile. Here, we present a detailed temporal analysis of the magnetization manipulation during slice-selective adiabatic pulses by comparing measured and simulated data.