Perturbation of the current density in a magnetic resonance imaging antenna induced by the presence of a patient

Author

Ouldkhal, A. ; Bandelier, B. ; Rioux-Damidau, F.

Author_Institution

Inst. d´´Electron. Fondamentale, Univ. de Paris-Sud, Orsay, France

Volume

32

Issue

3

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

1649

Lastpage

1652

Abstract

The separate modellings of the surface current distribution in a MRI antenna (with nothing around), and of the volume eddy current appearing in a patient placed in a given magnetic field, have already been described (Ouldkhal et al., 1995; Bossavit and Verite, 1983; Bandelier and Rioux-Damidau, 1990). When the patient is put in the magnetic field of an antenna, there appear mutual reactions. The authors here present an iterative method which allows them to compute in this last case the current density in both antenna and body, even when they are very close to each other

Keywords

antenna theory; bioelectric phenomena; biomedical NMR; current density; eddy currents; iterative methods; physiological models; current density perturbation; human body; magnetic resonance imaging antenna; medical diagnostic imaging; patient; surface current distribution; volume eddy current; Conductors; Copper; Current density; Current distribution; Eddy currents; Impedance; Iterative methods; Magnetic fields; Magnetic resonance imaging; Receiving antennas; Resonant frequency;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.497571

Filename

497571