Abstract #4869
Measuring RF currents induced in implants using B1 + maps
Mlina Bouldi 1 and Jan M. Warnking 1,2
1
Grenoble Institut des Neurosciences - UJF,
Grenoble, Rhnes Alpes, France,
2
Inserm
U836, Grenoble, Rhnes Alpes, France
In the presence of conductive implants, the B1+ field
presents distortions generated by induced RF currents,
which can be linked to the expected SAR. We fitted a
theoretical model of the induced B1+ distortions to
experimental B1 data obtained in an ASTM phantom to
measure the current in a conducting wire. This indirect
measurement of wire current was compared to EM
simulations in a numerical model. This work may lead to
methods allowing rapid evaluation of the RF safety of
conductive wire in a given configuration.
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