Detailed Investigations of a Metamaterial Transmit/receive Coil Element for 7 T MRI

Jochen Mosig¹, Achim Bahr¹, Thomas Bolz¹, Andreas Bitz², Stephan Orzada²

In a previous work the design and numerical results for a composite right/left-handed metamaterial coil element were presented. This work shows dosimetric measurement and first imaging results together with further numerical results. A good agreement between the simulations and the measurements was observed. In contrast to the homogeneous B1 field, the circular polarized B1+ field shows some discontinuities. This has lead to the investigation of different designs for the metamaterial element. As a result, an extended layout is presented, that eliminates the local minima in the field distribution of the original element, and shows a significant different field distribution.