Radiofrequency heating studies on anesthetized swine using fractionated dipole antennas at 10.5 T.

摘要: PURPOSE:To validate electromagnetic and thermal simulations with in vivo temperature measurements, to demonstrate a framework that can be used predict increase caused by radiofrequency (RF) excitation dipole transmitter arrays. METHODS:Dipole arrays were deliver RF energy the back/neck region of swine using different patterns (n = 2-4 per swine) for heating. The anesthetized 3) was measured fluoroscopic probes 12) compared against modeling from animal-specific simulations. RESULTS:Simulated curves agreement data. root mean square error between simulated rise at all locations (at end each excitation) is calculated as 0.37°C. experimental maximum (averaged over experiments) 2.89°C. location 0.57°C. (Error values are averaged experiments.) CONCLUSIONS: Electromagnetic validated experiments. Thermal effects 10.5 Tesla dipoles investigated. Magn Reson Med 79:479-488, 2018. © 2017 International Society Magnetic Resonance Medicine.