Anna Andreychenko1, Vincent O. Boer1, Jan J.W. Lagendijk1, Peter R. Luijten1, Cornelis A.T. van den Berg1
1Imaging Division, UMC Utrecht, Utrecht, Netherlands
Volume coils are attractive RF transmit systems as they provide a flexible means of RF excitation for the whole body. As an alternative to volume coils a coaxial waveguide concept was proposed recently. Remarkable RF shimming performance of a multi-mode coaxial waveguide was demonstrated for the head at 7T. Here the performance of the multi-mode coaxial waveguide for body torso was investigated in terms of the achieved B1+ efficiency, homogeneity and RF safety constraints. Provided large excitation coverage it was shown that the multi-mode coaxial waveguide could be applied for efficient overall and targeted 3D RF shimming in body torso.