Transmit K-Space Calibration using Magnetic Field Probes

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

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.