Name
Abstract | ||
|---|---|---|
Balun or trap circuits are critical components for suppressing common-mode currents flowing on the outer conductors of coaxial cables in RF coil systems for Magnetic Resonance Imaging (MRI) and Magnetic Resonance Spectroscopy (MRS). Common-mode currents affect coils’ tuning and matching, induce losses, pick up extra noise from the surrounding environment, lead to undesired cross-talk, and cause safety concerns in animal and human imaging. First proposed for microwave antenna applications, the Lattice balun has been widely used in MRI coils. It has a small footprint and can be easily integrated with coil tuning/matching circuits. However, the Lattice balun is typically a single-tuned circuit and cannot be used for multi-nuclear MRI and MRS with two RF frequencies. This work describes a dual-tuned Lattice balun design that is suitable for multi-nuclear MRI/MRS. It was first analyzed theoretically to derive component values. RF circuit simulations were then performed to validate the theoretical analysis and provide guidance for practical construction. Based on the simulation results, a dual-tuned balun circuit was built for 7T
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Na MRI and bench tested. The fabricated dual-tuned balun exhibits superior performance at the Larmor frequencies of both
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Na, with less than 0.15 dB insertion loss and better than 17 dB common-mode rejection ratio at both frequencies. |
Year | DOI | Venue |
|---|---|---|
2022 | 10.1109/TMI.2022.3140717 | IEEE Transactions on Medical Imaging |
Keywords | DocType | Volume |
Animals,Equipment Design,Magnetic Resonance Imaging,Magnetic Resonance Spectroscopy,Phantoms, Imaging,Radio Waves | Journal | 41 |
Issue | ISSN | Citations |
6 | 0278-0062 | 0 |
PageRank | References | Authors |
0.34 | 4 | 5 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yue Zhu | 1 | 0 | 0.34 |
| Charlotte R Sappo | 2 | 0 | 0.34 |
| William A Grissom | 3 | 0 | 0.34 |
| John C Gore | 4 | 616 | 41.36 |
| Xinqiang Yan | 5 | 0 | 0.34 |