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Abstract #5070

Reconfigurable Coaxial Receive Dipoles for Dynamic Parallel Imaging of Human Brain at 9.4T

Georgiy Alekseevich Solomakha1, Felix Glang1, Theodor Steffen2, Klaus Scheffler1,3, and Nikolai Ivanovich Avdievich 1
1High-field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Tuebingen, Germany, 2Electronical Workshop, Max Planck Institute for Biological Cybernetics, Tuebingen, Germany, 3Department for Biomedical Magnetic Resonance, University of Tübingen, Tuebingen, Germany

Synopsis

Keywords: RF Arrays & Systems, RF Arrays & SystemsRecently developed dynamic parallel imaging, i.e. rapid modulation of element's sensitivities during acquisition, greatly improved the performance of the method. In this work, sensitivity profiles of dipole elements were electronically reconfigured by varying impedances of lumped element circuits connected in series with the dipoles . This required a large number of DC wires directly connected to the dipoles. In the present work, we developed, constructed, and evaluated a dynamically reconfigurable 8-element coaxial dipole array for brain imaging at 9.4T. Our design eliminates the DC wires directly connected to the dipoles and, hence, substantially simplifies further increasing the number of receive channels.

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