Optimized Signal Intensity and T1r Based NMR Thermometry for Ultra-High Field RF Safety Applications

Devashish Shrivastava¹, Timo Liimatainen¹, Ute Goerke¹, Jeramy Kulesa¹, Timothy Hanson¹, Shalom Michaeli¹, J. Thomas Vaughan¹

Good linear correlations were obtained between the core temperatures, and the 'optimized' signal intensities and the longitudinal magnetization relaxation rate constants in the rotating frame (i.e., T1r) in an in vivo porcine brain at 3 tesla (T). The correlations were obtained to measure RF heating induced temperatures with sub-degree Celsius accuracy in porcine brains at ultra-high fields.