论文标题
分析传输和接收方案中的高阻抗线圈
Analysis of High Impedance Coils both in Transmission and Reception Regimes
论文作者
论文摘要
高阻抗线圈（HIC）的理论（HIC） - 具有改良屏蔽的电缆环天线 - 在传输和接收方案方面进行了全面讨论。了解先前报道的HIC在传输方案中的弱点，我们建议另一种HIC，与常规环形天线相比，它在传输和接收方案中都是有利的。与以前的作品的主张相反，只有这种HIC才是实际收发器HIC。使用扰动方法并在电缆的屏蔽和内线上增加空白，我们调整共振频率适合于超高场（UHF）磁共振成像（MRI）。我们的理论模型通过模拟验证。从理论上讲，我们制造了一个以298 MHz运行的三个虫子的阵列。在UHF MRI中使用的不同幻像存在下，该阵列的操作已进行了实验研究，并且与传统阵列获得的结果相比。
Theory of a high impedance coil (HIC) - a cable loop antenna with a modified shield - is discussed comprehensively for both in transmitting and receiving regimes. Understanding a weakness of the previously reported HIC in transmitting regime, we suggest another HIC which is advantageous in both transmitting and receiving regimes compared to a conventional loop antenna. In contrast with a claim of previous works, only this HIC is a practical transceiver HIC. Using the perturbation approach and adding gaps to both shield and inner wire of the cable, we tune the resonance frequency to be suitable for ultra-high field (UHF) magnetic resonance imaging (MRI). Our theoretical model is verified by simulations. Designing the HIC theoretically, we have fabricated an array of three HICs operating at 298 MHz. The operation of the array has been experimentally studied in presence of different phantoms used in UHF MRI and the results compared with those obtained for a conventional array.
