Impact of imaging landmark on the risk of MRI-related heating near implanted medical devices like cardiac pacemaker leads
Corresponding Author
Peter Nordbeck
Department of Internal Medicine I, University Hospital Würzburg, Julius-Maximilians-University, Würzburg, Germany
Department of Experimental Physics V, Julius-Maximilians-University Würzburg, Würzburg, Germany
Medizinische Klinik und Poliklinik I, Kardiologie/Elektrophysiologie, Universitätsklinikum Würzburg, Oberdürrbacher Str. 6, Würzburg 97080, Germany===Search for more papers by this authorOliver Ritter
Department of Internal Medicine I, University Hospital Würzburg, Julius-Maximilians-University, Würzburg, Germany
Search for more papers by this authorMarcus Warmuth
Department of Experimental Physics V, Julius-Maximilians-University Würzburg, Würzburg, Germany
Research Center Magnetic-Resonance-Bavaria, Würzburg, Germany
Search for more papers by this authorDaniel Gensler
Department of Experimental Physics V, Julius-Maximilians-University Würzburg, Würzburg, Germany
Search for more papers by this authorNatalie Burkard
Department of Internal Medicine I, University Hospital Würzburg, Julius-Maximilians-University, Würzburg, Germany
Search for more papers by this authorVolker Herold
Department of Experimental Physics V, Julius-Maximilians-University Würzburg, Würzburg, Germany
Search for more papers by this authorPeter M. Jakob
Department of Experimental Physics V, Julius-Maximilians-University Würzburg, Würzburg, Germany
Research Center Magnetic-Resonance-Bavaria, Würzburg, Germany
Search for more papers by this authorGeorg Ertl
Department of Internal Medicine I, University Hospital Würzburg, Julius-Maximilians-University, Würzburg, Germany
Search for more papers by this authorMark E. Ladd
Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, Germany
Search for more papers by this authorHarald H. Quick
Institute of Medical Physics, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
Search for more papers by this authorWolfgang R. Bauer
Department of Internal Medicine I, University Hospital Würzburg, Julius-Maximilians-University, Würzburg, Germany
Search for more papers by this authorCorresponding Author
Peter Nordbeck
Department of Internal Medicine I, University Hospital Würzburg, Julius-Maximilians-University, Würzburg, Germany
Department of Experimental Physics V, Julius-Maximilians-University Würzburg, Würzburg, Germany
Medizinische Klinik und Poliklinik I, Kardiologie/Elektrophysiologie, Universitätsklinikum Würzburg, Oberdürrbacher Str. 6, Würzburg 97080, Germany===Search for more papers by this authorOliver Ritter
Department of Internal Medicine I, University Hospital Würzburg, Julius-Maximilians-University, Würzburg, Germany
Search for more papers by this authorMarcus Warmuth
Department of Experimental Physics V, Julius-Maximilians-University Würzburg, Würzburg, Germany
Research Center Magnetic-Resonance-Bavaria, Würzburg, Germany
Search for more papers by this authorDaniel Gensler
Department of Experimental Physics V, Julius-Maximilians-University Würzburg, Würzburg, Germany
Search for more papers by this authorNatalie Burkard
Department of Internal Medicine I, University Hospital Würzburg, Julius-Maximilians-University, Würzburg, Germany
Search for more papers by this authorVolker Herold
Department of Experimental Physics V, Julius-Maximilians-University Würzburg, Würzburg, Germany
Search for more papers by this authorPeter M. Jakob
Department of Experimental Physics V, Julius-Maximilians-University Würzburg, Würzburg, Germany
Research Center Magnetic-Resonance-Bavaria, Würzburg, Germany
Search for more papers by this authorGeorg Ertl
Department of Internal Medicine I, University Hospital Würzburg, Julius-Maximilians-University, Würzburg, Germany
Search for more papers by this authorMark E. Ladd
Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, Germany
Search for more papers by this authorHarald H. Quick
Institute of Medical Physics, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
Search for more papers by this authorWolfgang R. Bauer
Department of Internal Medicine I, University Hospital Würzburg, Julius-Maximilians-University, Würzburg, Germany
Search for more papers by this authorAbstract
Implanted medical devices such as cardiac pacemakers pose a potential hazard in magnetic resonance imaging. Electromagnetic fields have been shown to cause severe radio frequency-induced tissue heating in some cases. Imaging exclusion zones have been proposed as an instrument to reduce patient risk. The purpose of this study was to further assess the impact of the imaging landmark on the risk for unintended implant heating by measuring the radio frequency-induced electric fields in a body phantom under several imaging conditions at 1.5T. The results show that global radio frequency-induced coupling is highest with the torso centered along the superior–inferior direction of the transmit coil. The induced E-fields inside the body shift when changing body positioning, reducing both global and local radio frequency coupling if body and/or conductive implant are moved out from the transmit coil center along the z-direction. Adequate selection of magnetic resonance imaging landmark can significantly reduce potential hazards in patients with implanted medical devices. Magn Reson Med, 2010. © 2010 Wiley-Liss, Inc.
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