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引用次数: 1
摘要
这项工作提出了一种基于薄印刷电路板(PCB)的柔性超材料(MTM)透镜，可以在1.5 T (63.8 MHz)和3 T (127.7 MHz)磁共振成像(MRI)系统中工作。柔性MTM透镜嵌入扫描物体和接收线圈之间，使磁场向接收线圈方向聚焦，从而大大提高了信噪比。设计、制造了一种柔性MTM透镜，并对其进行了表征。测量结果表明，MTM透镜能够有效放大Tx线圈产生的磁场，从而增加了Rx线圈在两个频段捕获的射频功率，从而提高了1.5 T和3 T MRI的信噪比。
Flexible metamaterial lens for magnetic field and signal-to-noise ratio improvements in 1.5 T and 3 T magnetic resonance imaging
This work presents a thin printed circuit board (PCB) based flexible metamaterial (MTM) lens that can operate for both 1.5 T (63.8 MHz) and 3 T (127.7 MHz) magnetic resonance imaging (MRI) systems. The flexible MTM lens is embedded between a scanning object and receiver coil to focus the magnetic field toward the receiver coil, thereby enhancing the signal-to-noise (SNR) ratio greatly. A flexible MTM lens is designed, fabricated, and characterized. The measurement results show that the demonstrated MTM lens is highly effective for magnifying the magnetic fields generated by the Tx coil, thereby increasing the RF power captured by the Rx coil for both frequency bands which leads to the SNR improvement in 1.5 T and 3 T MRI.
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