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Abstract #2767

RF Safety of Aneurysm Clips at 7 Tesla: Effect of Field Polarization

Yacine Noureddine1, 2, Oliver Kraff2, 3, Mark E. Ladd2, 3, Gregor Schaefers4, Karsten H. Wrede5, Andreas K. Bitz2, 3

1MR:comp GmbH, MR Safety Testing Laboratory , Gelsenkirchen, NRW, Germany; 2Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, NRW, Germany; 3Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, NRW, Germany; 4MR:comp GmbH, MR Safety Testing Laboratory, Gelsenkirchen, NRW, Germany; 5Clinic for Neurosurgery, University Hospital Essen, Essen, NRW, Germany

RF-induced heating as a result of electric field elevations in tissue close to metallic aneurysm clips is a major concern with respect to the safety of patients with these implants. In this study, a detailed investigation of the orientation of the elongated implant with respect to the polarization of the electric field was performed. Polarization and incident angle of a uniform plane wave were varied in steps of 90 degrees utilizing numerical simulations. Additionally, field measurements were performed and compared to the simulations.

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Keywords

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