Print Email Facebook Twitter Transverse-EPT: A local first order electrical properties tomography approach not requiring estimation of the incident fields Title Transverse-EPT: A local first order electrical properties tomography approach not requiring estimation of the incident fields Author Leijsen, R.L. (TU Delft Signal Processing Systems) Brink, W. (Universiteit Leiden) An, X. (TU Delft Electrical Engineering, Mathematics and Computer Science) Webb, A. (TU Delft Signal Processing Systems) Remis, R.F. (TU Delft Signal Processing Systems) Faculty Electrical Engineering, Mathematics and Computer Science Date 2021 Abstract A new local method for magnetic resonance electrical properties tomography (EPT), dubbed transverse-EPT (T-EPT), is introduced. This approach iteratively optimizes the dielectric properties (conductivity and permittivity) and the z-component of the electric field strength, exploiting the locally E-polarized field structure typically present in the midplane of a birdcage radiofrequency (RF) coil. In contrast to conventional Helmholtz-based EPT, T-EPT does not impose homogeneity assumptions on the object and requires only first order differentiation operators, which makes the method more accurate near tissue boundaries and more noise robust. Additionally, in contrast to integral equation-based approaches, estimation of the incident fields is not required. The EPT approach is derived from Maxwell’s equations and evaluated on simulated data of a realistic tuned RF coil model to demonstrate its potential. To reference this document use: http://resolver.tudelft.nl/uuid:e479abdc-39b0-4b01-bf1c-059049a27e79 DOI https://doi.org/10.2528/PIERM21021006 ISSN 1070-4698 Source Progress in Electromagnetics Research, 102, 137-148 Part of collection Institutional Repository Document type journal article Rights © 2021 R.L. Leijsen, W. Brink, X. An, A. Webb, R.F. Remis Files PDF 21021006.pdf 725.22 KB Close viewer /islandora/object/uuid:e479abdc-39b0-4b01-bf1c-059049a27e79/datastream/OBJ/view