As a diagnostic method, magnetic resonance imaging (MRI) is not allowed to be used in patients with medical implants, including both active implants (such as cardiac deifbrillators or deep brain stimulators) and passive implants (such as orthopedics implants and support). MRI imaging scanning can produce magnetic ifelds, which will produce concentrated electromagnetic induction on metal edges of the implants, such as electrodes. The magnetic ifeld can also signiifcantly increase the temperature of surrounding tissues. Besides, the currents and voltage produced by active implants when exposed to MRI scanning can lead to damage and malfunction of pulse generators. Therefore, patients with medical implants cannot receive MRI as a diagnostic method. This safety protocol prevents a large group of patients from receiving MRI diagnosis. This leads to the conclusion that the safety evaluation of implants under MRI environment requires the combination of accurate data analysis and experimental techniques so as to establish the standard testing program.
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