David Otto Brunner1, Jan Paska2, Ingmar Graesslin3, Jrg Froehlich2, Klaas Paul Pruessmann1
1Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland; 2Electromagnetic Fields and Microwave Laboratory, ETH Zurich, Zurich, Switzerland; 3Philips Research Europe, Hamburg, Germany
Since the sample becomes considerably larger than the wavelength in human ultra high field MRI, the electrodynamic degrees of freedom within the loaded bore increases. Using a mode selectively fed waveguide section coupling into the loaded bore it is demonstrated that parallel imaging techniques in transmission and reception such as RF shimming and SENSE can be applied in a travelling wave approach in the absence of a RF array coil close by the object. A direct dependence between the parallel imaging performance of this 8 channel system and the number of modes in the waveguide could be shown.