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Abstract #0491

Do Constraints On |B1+| Also Constrain |E| & SAR in High Field MR?

Leeor Alon1,2, Cem Murat Deniz1,2, Daniel K. Sodickson1,2, Yudong Zhu1,2

1Center for Biomedical Imaging, Department of Radiology, NYU School of Medicine, New York, NY, USA; 2Sackler Institute of Graduate Biomedical Sciences, NYU School of Medicine, New York, NY, USA

Since the local specific absorption rate (SAR) is difficult to measure in vivo, one approach to ensure patient safety utilizes simulation software such as xFDTD to compare simulated and measured |B1+| fields, under the assumption that a high correlation between the two implies that the simulated local electric fields also align with the unmeasured experimental local electric fields. The numerical simulation results in this abstract indicate, however, that substantial variations in electric field and SAR are indeed possible with minimally-varying |B1+| in the setting of distinct tissue properties at 7T field strength.