论文标题
具有混合L-C环的多通道RF收发器阵列，脚/脚踝MR成像为7T
A Multichannel RF Transceiver Array with mixed L-C loop and microstrip elements for Foot/Ankle MR Imaging at 7T
论文作者
论文摘要
由于解剖学的不规则几何形状，设计有效的脚和脚踝成像的有效收发器线圈阵列在技术上具有挑战性。由于超高场处的高操作频率而缩短波长会增加相变的变化，从而导致成像样品中的B1分布不均匀。在这项工作中，我们提出了一种混合设计，其中包括7T超高场的多通道脚/脚踝收发器阵列的混合L-C环和微带谐振器。提出的收发器阵列由14个微带谐振器和5个L-C环线圈组成，以覆盖不规则形状的脚/脚踝的整个区域，其在7T时具有相对均匀的B1分布。提出的设计的可行性和现场行为是系统地研究的。
It is technically challenging to design efficient transceiver coil arrays for foot and ankle imaging at ultrahigh fields due to the irregular geometry of the anatomy. Shortened wavelength because of the high operation frequency at ultrahigh fields increases phase variation, leading to inhomogeneous B1 distribution in the imaging sample. In this work, we propose a hybrid design with mixed L-C loops and microstrip resonators for multichannel foot/ankle transceiver arrays at the ultrahigh field of 7T. The proposed transceiver array consists of 14 microstrip resonators and 5 L-C loop coils to cover the entire region of interest of the irregular-shaped foot/ankle with a relatively uniform B1 distribution at 7T. The feasibility and field behavior of the proposed design are systematically investigated numerically.
