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Abstract #1860

Correlation of improved local SAR deposition with reduced shading close to hip implants

Thomas Lottner 1,2 , Mathias Nittka 1 , Theresa Bachschmidt 1,3 , Heiko Meyer 1 , and Wolfgang Nitz 1,2

1 Siemens Healthcare, Erlangen, Germany, 2 University of Regensburg, Regensburg, Germany, 3 Experimental Physics 5, University of Wrzburg, Wrzburg, Germany

Changing the B1 polarization has shown to reduce artifacts due to induced currents in metallic implants. The presented work aims to show that the right elliptical polarization not just improves image quality, but furthermore decrease the SAR value near the implant. Numerical simulations were performed on a human male with a simplified implant model placed in his right femoral bone. The optimal polarization was approximated by an analytical model. The optimized and the circular polarization were compared and a significant increase of B1 homogeneity and decrease in local SAR was shown for the elliptical polarization.

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