Abstract #3665

E-field Comparison of 1.5T Transmit Head and Extremity Coils to 1.5T Body Coils – Implications for Implantable Cardiac Pacemaker and Defibrillator RF Heating and Unintended Stimulation

Shiloh Sison¹, Xin Huang², Shi Feng³, Ji Chen², Richard Williamson³, and Gabriel Mouchawar³

¹St. Jude Medical, Sunnyvale, CA, United States, ²University of Houston, Houston, TX, United States, ³St. Jude Medical, Sylmar, CA, United States

E-fields tangential to implantable cardiac pacemakers and defibrillators were analyzed at Normal and First Level Controlled Operating Modes as well as 30uT peak B1+. 1.5T body transmit and head and extremity transmit RF coils were simulated. A comparison of the Etans generated by the body transmit coils is made to those generated by head and extremity transmit coils. If RF heating and voltage can be shown to be safe with unrestricted body coils then no additional analysis is necessary for head and extremity coils since there is a 9x margin in RF heating and 3x margin in voltage.

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