Investigation of the resonance behavior of a MR-birdcage applying a 3-D-FEM code

Author

Renhart, W. ; Biró, O. ; Wach, P. ; Stollberger, R.

Author_Institution

Inst. for Fundamentals & Theory in Electr. Eng., Tech. Univ. Graz, Austria

Volume

37

Issue

5

fYear

2001

fDate

9/1/2001 12:00:00 AM

Firstpage

3688

Lastpage

3692

Abstract

For MR-imaging processes, high precision in the homogeneity of the static magnetic field B&oarr;₀ and of the high frequency transversal field B&oarr;₁ is extremely important. Investigations on the behavior of the field B&oarr;₁ in a widely used birdcage resonator type consisting of twelve rods are presented in this paper. On coil systems for B&oarr;₀-fields of 1.5 T and of 4.0 T the field requirements at resonance will be discussed. Special attention is paid to the influence of necessary RF-shields. The numerical simulations of the resonators are done using a 3D finite element code, based on an edge element formulation

Keywords

coils; electromagnetic shielding; finite element analysis; magnetic fields; magnetic resonance imaging; resonators; 1.5 T; 3D finite element method; 4.0 T; RF shield; birdcage resonator; coil system; edge elements; magnetic field; magnetic resonance imaging; numerical simulation; Capacitance; Coils; Copper; Finite element methods; Frequency; Geometry; Image quality; Magnetic fields; Magnetic resonance; Numerical simulation;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.952691

Filename

952691