MR Temperature Mapping in Brain: A Comparison of the GRE, Segmented EPI and Ss EPI Sequences Based on the Proton-Resonance-Frequency-Method

Antje Kickhefel¹, Joerg Roland², Fritz Schick³

MR temperature mapping was performed with healthy volunteers using a gradient echo (GRE), a segmented EPI (seg EPI), and a single shot EPI (ss EPI) sequence at 1.5T and 3T using comparable acquisition parameters. The ss EPI sequence turned out as the fastest (100ms per slice) and most precise (0.2C over 12 minutes on 3T) sequence in human brain. Heating of meat samples were measured for the GRE and the ss EPI sequence to show temperature measurement accuracy for the ss EPI. The results from seg EPI and GRE sequences were more robust against motion as well as other distortions.