Patients carrying multiple leads like abandoned pacemaker leads are still denied MRI scans, as their situation is not currently covered by the existing safety guidelines. Therefore, to assess the impact of lead coupling regarding radiofrequency-induced heating, temperature measurements were performed on different types of simplified leads and coupling factors were introduced to quantify and evaluate the phenomenon. The lead coupling can have a significant impact on temperature and can either induce higher or lower temperatures compared to the case when the leads are alone, and thus should be considered in future MRI safety standards.
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