Abstract #1873

Estimating B1+ of the breast at 7T using a generic distribution

Michael J van Rijssel¹, Josien P W Pluim¹, Peter R Luijten¹, Alexander J Raaijmakers¹, and Dennis W J Klomp¹

¹Center for Image Sciences, UMC Utrecht, Utrecht, Netherlands

Quantitative DCE-MRI requires reliable B₁⁺ information. This study presents a simulation-based fast B₁⁺ estimation method for DCE breast imaging at 7T. Numerical FDTD simulations were conducted to assess the inter-subject differences in B₁⁺ for four volunteers using segmented breast images for the simulation model. Inter-subject differences are shown to be comparable to the accuracy of popular B₁⁺ mapping methods, justifying the use of one generic B₁⁺ distribution for B₁⁺ estimation (coil template). This template was created by averaging the simulated B₁⁺ distributions over the four volunteers. We demonstrate the feasibility of this method in three in-vivo cases.

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