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Abstract #4795

3D MRI Thermometry of MR-Induced Heating of a Wire and Determination of Total Generated Heat

Philipp Ehses1, Marcos A. Lopez1,2, Michael Friedrich3, Florian Fidler2, Peter Nordbeck4, Marcus Warmuth4, Peter M. Jakob1,2, Wolfgang R. Bauer4

1Dept. of Experimental Physics 5, Universitt Wrzburg, Wrzburg, Germany; 2Research Center Magnetic Resonance Bavaria (MRB), Wrzburg, Germany; 3Biotronik GmbH & Co. KG, Berlin, Germany; 4Dept. of Internal Medicine I, Universitt Wrzburg, Wrzburg, Germany

Possible tissue damage due to RF-induced heating is one of the main reasons for the contraindication of MRI examinations on patients with metallic implants. These heating effects are often examined in phantom studies with fiberoptic probes. Possible positioning errors and the lack of spatial coverage are two disadvantages of this approach. In this work, the temperature increase of a wire was monitored in a phantom with a recently proposed combination of an MRI thermometry method and simultaneous MRI heating. This method was adapted for three dimensions and the heat generated at the wire tip was calculated from a region of interest.