Abstract #4900
B1+-based SAR assessment using a birdcage coil at 7 Tesla: experimental evaluation using magnetic resonance thermometry
Nicolas Boulant 1 , Ulrich Katscher 2 , Michel Luong 1 , Aurelien Massire 1 , Alexis Amadon 1 , and Alexandre Vignaud 1
1
Neurospin, CEA, Saclay, Ile de France,
France,
2
Philips
Research Europe, Hamburg, Germany
The emerging field of Electric Properties Tomography has
shown great promise to provide patient-specific
information about the electric field via the
post-processing of measured B1+ data utilizing Maxwells
equations. The work of Voigt et al furthermore showed a
good correlation between the numerically determined SAR
distribution and the one based on the post-processing of
the B1+ field at up to 3T, but with a global offset
between the two. The purpose of this work was to
experimentally evaluate this B1+-based SAR determination
via MR temperature-based measurements at 7T with a
birdcage coil on a phantom of known electrical
properties.
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