Abstract #5584

Safety and Function of Programmable Ventriculo-Peritoneal Shunt Valves: An in vitro 7 Tesla Magnetic Resonance Imaging Study

Karsten H Wrede^1,2, Bixia Chen^1,2, Ulrich Sure², Harald H Quick^1,3, and Oliver Kraff¹

¹Erwin L. Hahn Institute for MRI, University of Duisburg-Essen, Essen, Germany, ²Department of Neurosurgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany, ³High Field and Hybrid MR Imaging, University Hospital Essen, University of Duisburg-Essen, Essen, Germany

This in vitro study tests function, safety and image artifacts of the two worldwide most frequently implanted programmable VP-shunt valves in a 7 Tesla whole body MRI system. Both tested programmable VP-shunt valves lost their ability to be reprogramed after exposure to the static magnetic field and are therefore unsafe for use in 7 Tesla whole body scanners in their current design. Magnetic coercivity of the permanent magnets in the programming mechanisms was insufficient. Image artifacts adjacent to the valves, however, were tolerable.

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