New horizons in MR technology: RF coil designs and trends.
New horizons in MR technology: RF coil designs and trends.
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DOI：
10.2463/mrms.6.29
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发表时间：
2007-01-01
期刊：
影响因子：
--
通讯作者：
Fujita, Hiroyuki
中科院分区：
文献类型：
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作者：
Fujita, Hiroyuki
并行成像技术发展非常迅速，并且实现其全部潜力需要设计具有不断增加的接收器通道数量（32至128）的磁共振（MR）扫描器。特别是，1.5特斯拉和3特斯拉快速MR成像应用现在用于日常临床实践。这两种优势都需要在并行成像方案的框架内实现最大信噪比（SNR）和多探测器阵列线圈优化，以实现更先进、更快速的临床MR扫描。前置放大器是探测器阵列线圈中的关键部件，并且除了单纯的信号放大之外还具有许多功能。一个关键功能是帮助各个线圈去耦，这对于最佳SNR和并行成像性能至关重要。为了支持用于并行成像的大量探测器阵列线圈，前置放大器必须在物理上非常小，使得它们可以紧密地封装在一起以形成优化的探测器阵列。作者在此回顾了本领域技术人员报告的最新工作，以考虑确定多少通道是足够的以及我们可以走多快的基本原理。本文探讨了用于MR成像的RF阵列线圈的重要和基本原理，并回顾了最先进的阵列线圈，包括用于transmant-SENSE或并行传输应用的线圈。还考虑了射频（RF）线圈技术的未来。
Parallel imaging techniques have developed very rapidly, and realization of their full potential has required the design of magnetic resonance (MR) scanners with ever-increasing numbers of receiver channels (32 to 128). In particular, 1.5- and 3-Tesla fast MR imaging applications are now used in everyday clinical practice. Both strengths require maximum achievable signal-to-noise ratio (SNR) and multi-detector array coil optimization within the framework of the parallel imaging scheme for more advanced and faster clinical MR scanning. Preamplifiers are key components in the detector array coils and serve many functions beyond mere signal amplification. One critical function is to aid in the decoupling of individual coils, which is essential for optimal SNR and the performance of parallel imaging. To support a large number of detector array coils for parallel imaging, preamplifiers must be physically very small so that they may be tightly packed together to form an optimized detector array. The author herein reviews the state-of-the-art work reported by those skilled in the art to consider the rationale for determining how many channels are enough and how fast we can go. The paper explores the important and fundamental principles of RF array coils for MR imaging and reviews cutting-edge array coils, including those for transmit-SENSE or parallel transmission applications. The future of radiofrequency (RF) coil technology is also considered.