B1 Shimming using Phase Shifts For Travelling Wave MRI with a Coaxial Waveguide

Stefan Alt¹, Marco Mller¹, Reiner Umathum¹, Michael Bock¹

Travelling wave MRI with a coaxial waveguide can be used to focus RF energy to a predefined imaging region and has no lower cut-off frequency. However, the coaxial TEM mode creates