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To compare the magnetic resonance imaging (MRI)‐related heating per unit of whole body averaged specific absorption rate (SAR) of a conductive implant exposed to two different 1.5‐Tesla/64 MHz MR systems.

Temperature changes at the electrode contacts of a deep brain stimulation lead were measured using fluoroptic thermometry. The leads were placed in a typical surgical implant configuration within a gel‐filled phantom of the human head and torso. MRI was performed using two different transmit/receive body coils on two different generation 1.5‐Tesla MR systems from the same manufacturer. Temperature changes were normalized to whole body averaged SAR values and compared between the two scanners.

Depending on the landmark location, the normalized temperature change for the implant was significantly higher on one MR system compared to the …