Abstract #2232

Subject-specific SAR prediction in adults and children at 7.0T

Gianluigi Tiberi^1,2, Mauro Costagli^1,2, Laura Biagi², Alessio De Ciantis³, Nunzia Fontana⁴, Riccardo Stara^5,6, Mark R Symms⁷, Mirco Cosottini⁸, Renzo Guerrini³, and Michela Tosetti^1,2

¹Imago7, Pisa, Italy, ²IRCCS Stella Maris Foundation, Pisa, Italy, ³Meyer Children’s Hospital, Firenze, Italy, ⁴Dipartimento di Ingegneria dell'Informazione, Pisa, Italy, ⁵National Institute of Nuclear Physics (INFN), Pisa, Italy, ⁶Stanford University, Stanford, CA, United States, ⁷General Electric ASL Scientist (EMEA), Pisa, Italy, ⁸Department of Translational Research and New Surgical and Medical Technologies, Pisa, Italy

In this study we propose a procedure which allows the prediction of global and local subject-specific SAR exposure for commonly used 7.0T sequences. Prerequisites for such prediction are: sequences’ SAR exposure simulated on the generic anatomic models; subject-specific measured B₁⁺ maps. Validation has been provided through phantom experiment. We observed that: SILENT and FLAIR can be safely used in all subjects, both adults and children; FLAIR is more SAR demanding than SILENT; predicted SAR exposure does not show a significant variation with subject weight.

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