Xavier Radu1, Alexander Raaijmakers2, Astrid L. van Lier2, christophe Craeye3, Cornelis A. van den Berg2
1Laboratoire de Tlcommunications et Tldtection, Universit catholique de Louvain , Louvain, Belgium; 2Dept. of Radiotherapy, Imaging Division, Utrecht, Netherlands; 3Laboratoire de Tlcommunications et Tldtection, Universit catholique de Louvain, Louvain, Belgium
In this study we propose to use a metamaterial wire medium for the collimation and transfer of RF transmit and receive field from the source region to a distant location. The use of a such parallel wire medium in MRI opens several prospects: (i) the possibility to design more reliable endoscopic sensors; (ii) the possibility to create a flexible transmit configuration to excite particular regions with good homogeneity. Hereafter, the properties of wire media are investigated both numerically and experimentally. We show experimentally at 3 and 7T that the collimation and transfer can be very efficient.