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Abstract #5091

A Fast and Dedicated First-Order Differencing EPT Reconstruction Method

Patrick Stefan Fuchs1, Stefano Mandija2, Peter Stijnman2, Wyger Brink3, Cornelis van den Berg2, and Rob Remis1

1Circuits and Systems, Delft University of Technology, Delft, Netherlands, 2Centre of Image Sciences, University Medical Centre Utrecht, Utrecht, Netherlands, 3C.J. Gorter Center for High Field MRI, Leiden University Medical Center, Leiden, Netherlands

A new method for reconstructing electrical properties from $$$B_1^+$$$ data based on Maxwell's equations in an E polarized field (found in the midplane of a birdcage coil) is presented. This first-order EPT (foEPT) method uses first order spatial derivatives as opposed to the second order Helmholtz based MR-EPT methods and is thus less susceptible to noise. Furthermore, the method does not rely on any homogeneity assumptions. The method is validated using an in-vivo phantom measurement and compared to an MR-EPT reconstruction. FoEPT conductivity reconstructions show less noise-amplification and less boundary artefacts compared to Helmholtz-based MR-EPT reconstructions.

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