Premium
Predicting RF field penetration in heterogeneous bodies using a 3‐D finite element approach: Preliminary results
Author(s) -
Petropoulos L. S.,
Haacke E. M.,
Brown R. W.,
Boerner E.
Publication year - 1993
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1910300315
Subject(s) - finite element method , penetration (warfare) , nuclear magnetic resonance , field (mathematics) , physics , materials science , computer science , mathematics , pure mathematics , operations research , thermodynamics
We present preliminary results for a 3D finite element calculation to evaluate RF penetration in conducting dielectric materials at high field strengths. A tetrahedral mesh is used along with a Coulomb gauge constraint in a finite element method that yields excellent numerical stability at high frequencies. Accuracy is verified by comparisons with analytic solutions for single‐layer and multiple‐layer heterogeneous systems and for a 3D spherical model. We have also compared the finite element model with experimental results presented by Foo et al., Magn. Reson. Med. 23, (1992). Agreement is very good and argues for the usefulness of the method in the calculation of RF penetration and RF power deposition effects in heterogeneous objects.