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.
Keywords