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Abstract #0888

MR Temperature Measurements of Activities Outside the Magnet Using Image Registration and a Fixation Device

Michael Bock1, Axel Joachim Krafft1, Florian Maier1, Hans H. Paessler2

1Medical Physics in Radiology, German Cancer Research Center (dkfz), Heidelberg, Germany; 2Center for Knee & Foot Surgery/Sports Trauma, ATOS Clinic, Heidelberg, Germany

During sports activities such as skiing temperature changes of up to 10 K have been measured invasively. In this work we propose the use of MR temperature measurements in the knee where the thermal stimulation is performed outside the magnet. With a temperature-sensitive 3D FLASH sequence proton resonance frequency data are acquired before and after stimulation, and image co-registration is achieved with both a passive fixation device and an alignment post-processing algorithm to calculate phase difference maps.