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Abstract #4834

Metamaterial cell for B1+ field manipulation at 9.4T MRI

Irena Zivkovic 1 and Klaus Scheffler 1,2

1 High Field MRI, Max Planck Institute for Biological Cybernetics, Tuebingen, Germany, 2 Center for Integrative Neuroscience, University of Tuebingen, Tuebingen, Germany

Many techniques have been developed to improve magnitude and homogeneity of B1+ field at high field MRI. In order to manipulate B1+ field, we have designed one cell metamaterial (MM) plate. When proposed material was placed between RF transmit coil and phantom, B1+ magnitude and homogeneity significantly improved. Measured results show over 100% increase of B1+ magnitude in specific area in the case when box monopole antenna was used as a transmitter. When small loop antenna was used as a transmitter, there was zero B1+ field without MM plate and significant B1+ when MM plate was inserted.

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