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Abstract #3087

Peripheral Nerve Stimulation Considerations in the Presence of the Metallic Objects

Vahid Ghodrati 1 , Niloufar Zakariaei 1 , and Abbas Nasiraei Moghaddam 1,2

1 BME, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Tehran, Iran, 2 School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran

Foreign objects with high conductivity can intensify and concentrate the induced eddy currents from the gradient switching. These concentrated currents in turn may cause PNS during MR-imaging and potentially result in a mild to intolerable discomfort for the patient especially when the foreign object is in the vicinity of sensible locations. The maximum limit for applied gradient intensity in different gradient switching times has been modified to guarantee the safe mode in the presence of metallic objects. We showed that the conductive materials mostly affect the small rise times as the modifies limit is less sensitive to gradient rise time compared to IEC standard.

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