For implant systems composed of an implantable pulse generator (IPG) and lead(s), the MR-Conditional labeling specifies a magnetic spatial gradient for the whole system but not for its individual components. To identify the component experiencing the highest magnetic force, thus dictating the safe limit, we measured multiple IPGs and leads per ASTM F2052-15. The highest force on leads under 4.77T/m, 20T/m, and 50T/m was 0.003N, 0.021N, and 0.053N, respectively. The lowest IPG forces were 0.080N, 0.529N, and 1.322N. For any magnetic spatial gradient, the lowest IPG force was 2,480% greater than the highest lead force.
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