Anna Andreychenko1, Dennis W.J. Klomp1, Bob van den Bergen1, Bart L. van de Bank1, Hugo Kroeze1, Jan J.W. Lagendijk1, Peter Luijten1, Cornelis A.T. van den Berg1
1Dept. of Radiotherapy and Radiology, University Medical Center Utrecht, Utrecht, Netherlands
A strong attenuation of the traveling wave occurs during the passage through the body. In this study we propose a new concept to deliver a maximum B1+ to distant locations in the body using the waveguide with a coaxial conductive inset. A 2 to 6 times higher SNR ratios in 7T MR images of the male pelvis comparing to the standard traveling wave excitation were achieved with this concept. On top of that, the use of the coaxial conductive inset results in significantly lower SAR levels in the body.