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Abstract #2769

Thermal Simulations in the Human Head for High Field MRI Using Parallel Transmission

Aurlien MASSIRE1, Martijn CLOOS1, 2, Michel LUONG2, Alexis AMADON1, Alexandre VIGNAUD3, Christopher J. WIGGINS1, Denis LE BIHAN1, Nicolas BOULANT1

1DSV I2BM NeuroSpin, CEA, Gif-sur-Yvette, France; 2DSM IRFU SACM, CEA, Gif-sur-Yvette, France; 3Siemens Healthcare, Paris, France

Numerical simulations were performed to investigate the compliance of the specific absorption rate versus the temperature guidelines for the human head in MRI procedures utilizing parallel transmission at 7 T. Computations using finite elements and finite difference time domain techniques were implemented on a human head model to perform the electromagnetic and thermal simulations respectively. Temperature evolution throughout the head was calculated by integrating numerically the Pennes bioheat equation for 1000 parallel transmission scenarios corresponding to random static RF configurations, for the synthesized circularly polarized (CP) mode, and for two realistic Transmit-SENSE RF exposures.