An orthogonal‐based decoupling method for MRI phased array coil design
An orthogonal‐based decoupling method for MRI phased array coil design
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DOI：
10.1002/nbm.1799
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发表时间：
2012-06
影响因子：
2.9
通讯作者：
B. Li;Hua O. Wang;A. Trakic;C. Engstrom;E. Weber;S. Crozier
中科院分区：
文献类型：
--
作者：
B. Li;Hua O. Wang;A. Trakic;C. Engstrom;E. Weber;S. Crozier
基于三维正交原理设计、构建了一种新的2 T 3元件正交膝关节线圈阵列，并将其用于标准化体模、人膝关节和猪膝关节的一系列初步磁共振成像（MRI）研究。这个新线圈阵列内的线圈元件彼此垂直放置，从而可以在不使用任何无源相互去耦方案的情况下最大限度地减少有问题的相互耦合效应。所提出的方法是适当的设计的发射，接收和/或收发射频（RF）线圈阵列的应用在动物/人类MRI和光谱研究。实验结果表明，3元件正交膝关节线圈阵列可以相对于主静磁场（B 0）任意倾斜（包括90°），同时保持正常运行，效率和功能损失最小。猪膝关节样本的初步试验进一步表明，当正交膝关节线圈阵列和猪膝关节样本与B 0成约55°角时，观察到髌骨韧带（平行胶原纤维）中的最大信号强度，这可能在魔角MR应用中具有潜在用途。版权所有© 2011约翰威利父子有限公司.
A new 2 T 3‐element orthogonal knee coil array based on the three‐dimensional orthogonality principle was designed, constructed and used in a series of pilot magnetic resonance imaging (MRI) studies on a standardized phantom, and human and pig knees. The coil elements within this new coil array are positioned orthogonal to one another allowing problematic mutual coupling effects to be minimized without the use of any passive mutual decoupling schemes. The proposed method is appropriate for the design of transmit, receive and/or transceive radiofrequency (RF) coil arrays for applications in animal/human MRI and spectroscopic studies. Experimental results demonstrated that the 3‐element orthogonal knee coil array could be angled arbitrarily, including at 90°, relative to the main static magnetic field (B0) whilst maintaining normal operation with minimal loss of efficiency and functionality. Initial trials with a pig knee specimen further showed that the greatest signal intensity in the patellar ligament (parallel collagen fibres) was observed when the orthogonal knee coil array and the pig knee specimen were angled at ~55° to B0, which may have potential uses in magic angle MR applications. Copyright © 2011 John Wiley & Sons, Ltd.