Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
Renhart, W; Magele, CA; Richter, KR; Wach, P; Stollberger, R.
Application of Eddy-Current Formulations to Magnetic-Resonance-Imaging
IEEE T MAGN . 1992; 28: 1517-1520.
Doi: 10.1109/20.123985
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- Co-Autor*innen der Med Uni Graz
- Stollberger Rudolf
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- Abstract:
- In this paper the calculation of 3D-Radio Frequency (RF) fields with the aid of an eddy current formulation based on finite elements is described. It is shown that the displacement current density in the first Maxwell equation can be taken into account by making the conductivity sigma a complex quantity. The validity of this formulation has been verified by calculating a conducting sphere influenced by a homogenuous timeharmonic RF-field. The numerical results are compared with an analytical solution. Finally, the formulation described has been applied to calculate a 3D phantom with regions of different conducting materials. For this phantom measured results obtained by MR-Imaging exist and are compared, too.