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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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