Abstract #0917

Incident electric field on implanted lead vs. source position and field polarization

Elena Lucano^1,2, Micaela Liberti², Gonzalo G Mendoza¹, Tom Lloyd³, Francesca Apollonio², Steve Wedan³, Wolfgang Kainz¹, and Leonardo M Angelone¹

¹Center for Devices and Radiological Health, Office of Science and Engineering Laboratories, U.S. Food and Drug Administration, Silver Spring, MD, United States, ²Department of Information Engineering, Electronics and Telecommunications, Univerisity of Rome "Sapienza", Rome, Italy, ³Imricor Medical Systems, Burnsville, MN, United States

We aim to generate a quantitative method for RF-safety of patients with partially implanted leads at 64 MHz. Within this aim, the position of the RF feeding sources and the orientation of the polarization is often unknown, as it is the quantitative effect of such variables on the induced currents on the leads. The Electric field profile was studied by means of simulations and measurements with a coil loaded with a phantom, and simulations with an anatomical human model. Changes of up to 40% of E-field magnitude were observed. Future work is needed to develop a systematic exposure procedure.

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