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Abstract #2177

Proton Imaging at 4.7 T Using a Piezoelectric-based Automation System for impedance matching of Monolithic Transmission Line Resonators

Zhoujian Li1, Sajad Hosseinnezadian1, Geneviève Guillot1, Georges Willoquet1, Laurène Jourdain1, Marie Poirier-Quinot1, Luc Darrasse1, and Jean-christophe Ginefri1

1Laboratoire d'Imagerie par Résonance Magnétique Médicale et Multi-Modalités, Université Paris-Sud, Orsay, France

We have implemented a piezo-motor based automation system for contactless impedance matching of a monolithic Transmission Line Resonator (TLR) operating at 4.7 T. The automation system successfully achieved inductive matching to more than -30dB of the TLR inside the magnet and no artifacts was observed on the image of a rectangular box-shaped water phantom. A second image, acquired in the same condition but in the presence of another piezo-motor fixed on a side of the sample revealed that the close proximity of the piezo-motor to the sample brings B1-field inhomogeneity.

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