We introduce a method to calculate lead-tip voltage for implanted devices by considering 1) the individualized lead path extracted from X-ray-based images, 2) the incident electric field per unit B1+rms derived for the RF transmitter and a digital human body model, 3) the complex RF wavenumber in an insulated conductor derived from antenna theory. T/R coil transmitters in whole-body at 1.5T and 3.0T were considered, as well as a head coil on a compact 3T. Based on leads in 10 subjects, the results show the compact 3T produces less lead tip voltage than whole-body T/R coils.
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Speltz et al. (2024) studied this question.
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