When a patient with implantable device such as deep brain stimulator undergoes MR scan, the exposure to gradient fields can induce strong voltage across the lead and cause unintended stimulation to the patient or damage the device. In this study, three tiers of voltage determination approach recommended by ISO/TS 10974 ED2 were executed. The analysis results indicate that the tier 3 approach which utilizes realistic gradient coil designs, anatomical models and numerical simulations may arrive at predicted voltage value five times lower than tier 1 approach because of the avoidance of over-conservative assumptions.
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