Print Email Facebook Twitter Assessing the MR compatibility of dental retainer wires at 7 tesla Title Assessing the MR compatibility of dental retainer wires at 7 tesla Author Wezel, J. Contributor Kooij, B.J. (mentor) Remis, R.F. (mentor) Faculty Electrical Engineering, Mathematics and Computer Science Department Electrical Engineering Programme Microwave Technology and Systems for Radar Date 2012-10-16 Abstract The radio frequent (RF) safety of dental retainer wires during Magnetic Resonance Imaging at 7 tesla has been investigated using electromagnetic simulations and thermal measurements on a phantom model. In the Netherlands up to 40% of the younger adults have such a dental retainer wire, which at the moment is listed as a contraindication for 7 T head scans. The conclusion of this study for the safety of retainer wires is the following. Short wires up to 32 mm can be considered RF safe for a clinical 7 tesla MR head scan. Longer wires are not always RF safe. A solution to heating due to longer wires is to fully cover the wire with a non conductive spacer such as a silicone sports mouth guard to ensure RF safety. As a consequence of these findings, people with a retainer wire have the possibility of going into a 7 tesla MR scanner. Subject MRIhigh field MRIRF safetySARdental retainer wire7 teslaelectromagnetic field simulationfiberoptic temperature measurementLUMC To reference this document use: http://resolver.tudelft.nl/uuid:ba429538-dd04-4229-adb7-8a6c249172a9 Embargo date 2013-01-03 Part of collection Student theses Document type master thesis Rights (c) 2012 Wezel, J. Files PDF Thesis_MR_compatibility_o ... _Wezel.pdf 6.36 MB Close viewer /islandora/object/uuid:ba429538-dd04-4229-adb7-8a6c249172a9/datastream/OBJ/view