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Abstract #4279

Distortions during excitation and acquisition in zoomed DWI combined with parallel transmission

Denis Kokorin1, J├╝rgen Hennig1, and Maxim Zaitsev1

1Medical Physics, University Medical Center Freiburg, Freiburg, Germany

In this work, we discuss off-resonance effects observed in zoomed DWI combined with 2D pulses based on EPI trajectories. Our main focus is placed on the use of parallel excitation (PEX) for shortening 2D pulses and further minimizing the distortion. Experimental data were obtained using a 3T MRI system with an 8-channel TxArray extension and analyzed in detail. We conclude that the use of PEX improves the matching between excitation and acquisition in zoomed EPI applications.

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