MR Thermometry using a Paramagnetic Lanthanide Complex for Evaluation of RF Safety

Shalmali Dharmadhikari^1,2, Navin Bansal^1,2

Determination of RF-induced heating during MRI is important for safety evaluation of RF-devices, pulse sequences and implants. Calorimetric assessment of specific absorption rate (SAR) requires accurate measurement of small temperature changes produced during MRI. MR thermometry with TmDOTP5- enables temperate measurement with high temperature and spatial resolution. Since the temperature changes during MRI occur due to heat deposition as well as dissipation, a model considering the effect of heat loss, for computation of SAR has been proposed. Application and development of MR thermometry technique with TmDOTP5- to image SAR has been successfully demonstrated.