The temperature rise in the vicinity of a medical implant due to the RF fie
ld in Magnetic Resonance Imaging taken to be a conducting cylinder resembli
ng the geometry of a commercial infusion pump. Measurements of temperature
rise were made with the pump in a phantom in a clinical imager, The RF prot
ocol was 20-minutes long and produced a specific absorption rate (SAR) of 0
.95 W/kg in the 34-kg phantom, In the measurements, the maximal temperature
rise near the implant (0.66 degrees C) was about 3 times the control rise
(0.23 degrees C) with no implant. The calculations are consistent with expe
riment.