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 B_eff,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.