Sukhoon Oh1, Colin A. Roopnariane2, Mohammad-Reza Tofighi2, Christopher M. Collins1
1PSU College of Medicine, Hershey, PA, United States; 2Engineering and Technology, Penn State University, Middletown, PA, United States
For evaluation of techniques for measuring heating related to specific absorption rate (SAR) in MRI, these can be advantageous to having independent control of heating and measurement coils. We describe an MRI-based method for mapping temperature and SAR using a solenoid coil and a birdcage coil for heating and imaging, respectively. The accuracy and quality of SAR/temperature mapping are enhanced by separating the heating and imaging coils. The MR-based temperature measurements were in good agreement with fiber-optic measurements. The dual-coil heating system was simulated using the finite-difference time-domain method. The distribution of numerically-calculated and experimentally-acquired SAR were in good agreement.