Jia Fan, Yuan Hongyang, Zhou Diange, Zhang Jue, Wang Xiaoying, Fang Jing
Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China.
NMR Biomed. 2015 Apr;28(4):460-7. doi: 10.1002/nbm.3264. Epub 2015 Mar 4.
The aim of this study is to fabricate and test a novel flexible flat cable antenna (FFCA) for MRI of the knee at different flexion angles. The FFCA was made of a flat cable, a tuning/matching circuit and a signal transmission line. To test its feasibility and validity, in vitro and in vivo experiments were carried out on a 3.0 T MR scanner. The in vitro experiment suggested that the proposed FFCA could achieve a high signal-to-noise ratio (SNR) of 336, while the SNR of an eight-channel knee coil was 291, and phantom images from the FFCA are homogeneously distributed. In the in vivo experiment, the FFCA had a higher SNR of 169 in the region of interest and more than 48.5 cm of longitudinal coverage, while the corresponding values for the commercial coil were 153 and 22.5 cm. Finally, five sagittal knee images at different flexion angles were acquired. The FFCA could acquire satisfactory knee images at different flexion angles, with the advantages of simplicity, low cost, large field of view and high SNR. It may therefore be further used to improve MR image quality of the knee joint.
本研究的目的是制作并测试一种新型的柔性扁平电缆天线（FFCA），用于在不同屈曲角度下对膝关节进行磁共振成像（MRI）。FFCA由扁平电缆、调谐/匹配电路和信号传输线组成。为了测试其可行性和有效性，在一台3.0 T磁共振扫描仪上进行了体外和体内实验。体外实验表明，所提出的FFCA能够实现336的高信噪比（SNR），而八通道膝关节线圈的SNR为291，并且来自FFCA的体模图像分布均匀。在体内实验中，FFCA在感兴趣区域具有169的较高SNR以及超过48.5 cm的纵向覆盖范围，而商业线圈的相应值分别为153和22.5 cm。最后，采集了不同屈曲角度下的五张膝关节矢状位图像。FFCA能够在不同屈曲角度下获取令人满意的膝关节图像，具有简单、低成本、大视野和高SNR的优点。因此，它可能会被进一步用于提高膝关节的磁共振图像质量。
