Abstract #5452

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

Oliver Kraff¹, Yacine Noureddine^1,2, Eileen Frerk^1,3, Andreas K Bitz⁴, Mark E Ladd^1,4, and Harald H Quick^1,5

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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