New Travelling Wave Coil Concepts

Marco Mueller¹, Reiner Umathum¹, Stefan Alt¹, Wolfhard Semmler¹, Michael Bock¹

Travelling wave MRI can be used to attenuate the standing wave problem of volume resonators at high magnetic field strengths, We present two designs of travelling wave stripline coils, which excite the RF field in the imaging region. These travelling wave coils limit the RF field to the region of interest, create a good homogeneous B1+ field distribution and reduce the global SAR. The coils can be realized as local TX/RX coils and also as an overall body coil. B1+ and SAR field distribution are shown and evaluated with a phantom and an anatomical human model.