Abstract #5229

Imaging-Based Subject-Specific SAR Maps using B1-mapping and Electrical Properties Tomography in a heterogenous Brain Phantom

Jessica A. Martinez¹, Adriano Troia¹, Alessandro Arduino¹, Kevin Moulin^2,3, Umberto Zanovello¹, Oriano Bottauscio¹, and Luca Zilberti¹

¹Advanced Materials Metrology and Life Science, Istituto Nazionale di Ricerca Metrologica, Torino, Italy, ²CREATIS Laboratory, University of Lyon, Lyon, France, ³Department of Radiology, University Hospital Saint-Etienne, Saint-Etienne, France

Synopsis

Keywords: Safety, Safety, Specific Absorption Rate, SARIn this work a heterogeneous realistic brain phantom, with electric and magnetic properties in the range of healthy gray-matter and white-matter, was constructed. The phantom was scanned at 3 T where T1 maps, T2 maps, magnitude, and phase information of the B1 field were acquired. The electrical conductivity was derived using a convection reaction EPT approach and the E field was obtained by solving Ampere’s law from the B1 field. From this information, imaging-based subject-specific SAR maps were acquired and compared to simulation-based SAR maps. The analysis time (acquisition and SAR calculation) was under 6 minutes.

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