Abstract #1444
Design of a Variable-Rate Selective Dual-Band FOCI Pulse for Spin Labeling
Fabian Zimmer 1 , Frank G Zllner 1 , and Lothar R Schad 1
1
Computer Assisted Clinical Medicine, Medical
Faculty Mannheim, Heidelberg University, Mannheim,
Germany
For pulsed arterial spin labeling (ASL) the quality of
the slice-selective inversion is decisive because of the
inherent low perfusion contrast. Commonly, adiabatic
inversion pulses are used. However, the adiabatic
condition has to be fulfilled, leading to a compromise
between the maximum available coil voltage and profile
quality, i.e. pulse parameters. Especially the high RF
power demand of adiabatic dual-band inversion pulses
normally leads to inversion profiles that are unusable
for ASL. We present a dual-band FOCI inversion pulse
with reduced RF power requirements that conserves the
high quality of a single-band FOCI pulse.
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