Rapid four-ring birdcage coil analysis: Design optimization for high efficiency, low interference, and improved body loading tolerance

The Design accuracy of MRI system with dual-tuned four-ring birdcage coils remains challenging due to inter-coil interference that tends to deteriorate signal-to-noise ratio and thus image quality. In this study, we develop an accurate and efficient FEM modeling strategy by optimizing model geometri...

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Bibliographic Details
Published in:Magnetic resonance imaging 2020-02, Vol.66, p.30-35
Main Authors: Shan, Kellsie, Duan, Yunsuo
Format: Article
Language:English
Subjects:
Body loading effect
Boundary condition
Coil coupling
Coil efficiency
Four-ring birdcage coil
Meshing density
Model geometry
Quality factor
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Summary:The Design accuracy of MRI system with dual-tuned four-ring birdcage coils remains challenging due to inter-coil interference that tends to deteriorate signal-to-noise ratio and thus image quality. In this study, we develop an accurate and efficient FEM modeling strategy by optimizing model geometries, meshing density, and boundary conditions in accord with the correlated measurements on test vehicles. By taking full advantages of simulation accuracy and efficiency, we are able to proceed with sensitivity analysis on critical RF characteristics such as resonance pattern, quality factor, coil coupling, and body loading effects, etc., which may further serve as guidelines for coil design optimization.
ISSN:0730-725X
1873-5894
DOI:10.1016/j.mri.2019.11.018