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Abstract #1847

Transmit K-Space Calibration using Magnetic Field Probes

Frederik Testud1, Christoph Barmet2, Martin Haas1, Denis Kokorin1, Juergen Hennig1, Klaas P. Pruessmann2, Maxim Zaitsev1

1Medical Physics, Dept. of Radiology, University Medical Center Freiburg, Freiburg, Germany; 2ETH & University, Zurich, Institute for Biomedical Engineering, Zurich, Switzerland

Field probes have been used in the last years for dynamic magnetic field monitoring in order to reduce image artifacts by using the measured field dynamics in the reconstruction. Parallel spatially selective Excitation allows inner volume imaging where only specifically regions of interest are excited. This relies on exact matching of multidimensional RF pulses and the simultaneously traversed k-space trajectory. Four 1H field probes were used for calibrating k-space trajectories used during transmit. The measured trajectories were then used to calculate RF pulses which were then applied to excite target patterns.