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Abstract #5452

RF safety of an implanted port catheter in direct vicinity of a 7T transmit head coil

Oliver Kraff1, Yacine Noureddine1,2, Eileen Frerk1,3, Andreas K Bitz4, Mark E Ladd1,4, and Harald H Quick1,5

1Erwin L. Hahn Institute for MRI, University Duisburg-Essen, Essen, Germany, 2MR Safety Testing Laboratory, MR:comp GmbH, Gelsenkirchen, Germany, 3Hamm-Lippstadt University of Applied Sciences, Hamm, Germany, 4Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, 5High Field and Hybrid MR Imaging, University Hospital Essen, Essen, Germany

Potential RF-induced heating from an implanted port catheter in direct vicinity of a local transmit head coil at 7T was investigated. The assessment included direct measurements of E-field and temperature in a rectangular head/shoulder phantom filled with tissue simulating liquid as well as numerical SAR and thermal simulations in two human body models. Two different RF coils were used for the evaluation, a custom-made 8-channel head coil and the widely-available Nova Medical head coil. No evidence of RF-induced heating was found. Identical transmit power restrictions apply with or without port for both investigated RF coil types.

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