Abstract #4800

A Standard Implant for Determination of Local SAR in Testing of RF-Induced Heating of an Implant

John A. Jallal¹, John A. Nyenhuis², Sung Min Park¹

¹Purdue University, West Lafayette, IN, USA; ²Purdue University , West Lafayette, IN, USA

RF-induced heating of tissue surrounding implanted medical devices can occur during MRI scans due to device interactions with the B1 magnetic field. The present method for determining local SAR in RF-induced heating tests is calorimetry, in which temperature rise is measured in the phantom with no implant. A standard implant consisting of a 1/8 x 10 cm titanium rod has been developed to measure local SAR, for which the temperature rise at the ends is measured and compared with calculation to determine the local SAR. This new method provides improved accuracy and is faster than calorimetry.