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Parameters Affecting Worst‐Case Gradient‐Field Heating of Passive Conductive Implants

Testing MRI gradient‐induced heating of implanted medical devices is required by regulatory organizations and others. A gradient heating test of the ISO 10974 Technical Specification (TS) for active implants was adopted for this study of passive hip implants. All but one previous study of hip implants used nonuniform gradient exposure fields in clinical scanners and reported heating of less than 5 °C. This present study adapted methods of the TS, addressing the unmet need for identifying worst‐case heating via exposures to uniform gradient fields.