Conference paper
Condition for optimal preamplifier decoupling in one-turn single- and multi-gap shielded loop MRI detectors
Department of Space Research and Technology, Technical University of Denmark1
Hyperpolarization & Metabolism, Magnetic Resonance, Department of Health Technology, Technical University of Denmark2
Magnetic Resonance, Department of Health Technology, Technical University of Denmark3
Metabolic Brain Magnetic Resonance, Magnetic Resonance, Department of Health Technology, Technical University of Denmark4
Department of Health Technology, Technical University of Denmark5
Electromagnetic Systems, Department of Space Research and Technology, Technical University of Denmark6
Shielded loops have recently attracted keen interest in the design of Magnetic Resonance Imaging (MRI) detector arrays. To prevent unwanted detuning of array elements, preamplifier decoupling is used. So far, the decoupling circuit design was based on intuitive approach of minimizing impedance presented to the terminals of the loop.
The approach leads to decent but not optimal results. In this paper a systematic analytical method is used to derive the exact condition for maximum decoupling of shielded loops in array. The condition describes precisely what impedance should be presented to the terminals of the loop for best decoupling.
It is shown that the method is valid for single- and multi-gap shielded loops with and without integrated reactive components across the gap. The presented results are useful in the design of MRI receive arrays of shielded loop coils with optimal decoupling.
Language: | English |
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Publisher: | IEEE |
Year: | 2023 |
Pages: | 150-154 |
Proceedings: | 2022 IEEE 2nd Ukrainian Microwave Week |
ISBN: | 9798350331523 |
Types: | Conference paper |
DOI: | 10.1109/UkrMW58013.2022.10037007 |
ORCIDs: | Wang, Wenjun , Sanchez, Juan Diego , Zhurbenko, Vitaliy and Ardenkjær-Larsen, Jan Henrik |