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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