Abstract #1807

On the electrodynamic constraints and antenna array design for human in vivo MR up to 70 Tesla and EPR up to 3GHz

Lukas Winter ¹ and Thoralf Niendorf ^1,2

¹ Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrck Center for Molecular Medicine, Berlin, Germany, ² Experimental and Clinical Research Center (ECRC), a joint cooperation between the Charit and the Max-Delbrueck Center for Molecular Medicine, Berlin, Germany

UHF MR (B0≥7T) and EPR share the suffering from electrodynamic constraints dictated by an increase in spin excitation frequency rendering human in vivo applications challenging if not elusive. Recognizing the opportunities of antenna array design to offset some of these constraints, this work utilizes electromagnetic field simulations in phantoms and human voxel models to analyze transmission field (B1+) and specific absorption rate (SAR) distributions of multi-channel phased array antennas for a frequency range of 3003000MHz corresponding to an effective field strength of 770T for proton MRI or ~10-100mT for EPR.

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