Lu, Ming., Zhu, Haoqin., Wang, Ruilin., & Yan, Xinqiang. (2025).听.听Magnetic Resonance in Medicine. Advance online publication.听
This study compared two types of聽wireless resonators鈥攄evices that can boost signal reception in聽MRI鈥攖o see which design improves image quality the most when used with local聽receive arrays. One design had聽strongly coupled units(connected to each other), and the other had聽decoupled units聽(independent from each other).
Both designs were built and tested at 1.5鈥疶 alongside a 12-channel聽head receive array, with the standard聽body coil聽used to transmit the radiofrequency signals. We measured how efficiently the resonators could be turned off (detuning), how much they improved the聽signal-to-noise ratio (SNR), and their effect on聽parallel imaging performance听(驳-蹿补肠迟辞谤).
The results showed that the聽decoupled design聽consistently performed better. It increased SNR by up to three times and lowered the g-factor, meaning it allowed faster imaging with higher quality. Compared to the original array, the decoupled resonator further improved imaging performance, making scans both quicker and clearer.
翱惫别谤补濒濒,听decoupled wireless resonators聽provide significant advantages over coupled ones, with easier detuning and substantial gains in SNR and g-factor, making them a strong choice for improving MRI image quality.
FIGURE 1
(A, B) Circuit diagrams of the constructed wireless resonators with coupled and decoupled units. (C, D) CAD and PCB design of these wireless resonators. (E, F) Illustration of the relative position of the head array and wireless resonators.