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Abstract #3868

Measurement of Q-Factors Including Radiation Loading of Strip-Type Coils for 7-Tesla MRI

Klaus Solbach1, Stephan Orzada2, Pedram Yazdanbakhsh1

1Radio Frequency Technology, University Duisburg-Essen, Duisburg, Germany; 2University Duisburg-Essen, Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany

Our strip conductor-type coil for 7-Tesla MRI exhibits strong radiation loading due to its length of a quarter-wave. The loading by a phantom is seen to be superimposed by mutual coupling effects in a similar way as known from antennas. When using the conventional figure of merit based on the unloaded to loaded Q-factors we have to perform the unloaded measurement with the coil under a conducting shield (Wheeler cap) in order to exclude the radiation loading.