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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