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Abstract #4091

NEAR-FIELD ELECTROMAGNETIC CLOAKING OF METALLIC ELONGATED IMPLANTS TO REDUCE RF-INHOMOGENEITY ARTIFACTS AND SAR ELEVATION

Umberto Zanovello1 and Luca Zilberti1
1Istituto Nazionale di Ricerca Metrologica (INRIM), Torino, Italy

The eddy currents induced by the RF magnetic field B1 due to the presence of a conductive object, such as a metallic implant, may compromise both the RF coil transmit and receive sensitivity homogeneity; especially in the periprosthetic areas. A further effect may be an increase of the local SAR which can affect the overall safety of the MRI exam. In this study, the outcomes of an electromagnetic cloaking strategy based on the application of a suitable coating to elongated conductive implants are shown. The coating restores the coil sensitivities and SAR distribution to those obtained without the implant presence.

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