Abstract #2989

Artifacts Affecting Derivative of $$$B_1^+$$$ maps for EPT Reconstructions

Stefano Mandija¹, Alessandro Sbrizzi¹, Astrid L.H.M.W. van Lier¹, Peter R. Luijten¹, and Cornelis A.T. van den Berg¹

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

EPT conductivity reconstruction is affected by difficulties to reliably calculate spatial derivatives on voxelized MRI data. Here, we explore the impact of several numerical approximations. In particular: the different size of finite-difference kernels and the k-space truncation (always present in MR images). We also explore a Fourier-domain alternative, which does not require finite-difference approximation kernels.

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