Johannes Thomas Schneider1, Christoph Barmet2,
Wolfgang Ruhm1, Klaas Paul Pruessmann2, Peter Ullmann1
1Bruker BioSpin MRI GmbH, Ettlingen,
Germany; 2Institute for Biomedical Engineering, University and ETH
Zurich, Zurich, Switzerland
Several
studies have demonstrated the benefit of measuring actually traversed k-space
trajectories and incorporating this information into the design process of
parallel spatially-selective excitation (PEX) pulses. However, most of the
applied measurement techniques are based on phase evolutions in situ within
the object. This leads to a strong dependency of data-quality and
-reliability on the imaged objects. To overcome these limitations, a newly
developed D2O-fieldprobe was used in this study in order to acquire
object-independent trajectory data. This allows robust measurements of
calibration data for the calculation of PEX pulses and results in high
excitation accuracy under various experimental conditions.