Stretchable coil arrays: Application to knee imaging under varying flexion angles
Stretchable coil arrays: Application to knee imaging under varying flexion angles
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DOI：
10.1002/mrm.23240
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发表时间：
2012-03-01
影响因子：
3.3
通讯作者：
Pruessmann, K. P.
中科院分区：
文献类型：
--
作者：
Nordmeyer-Massner, J. A.;De Zanche, N.;Pruessmann, K. P.
为了将用于MRI的高密度接收器阵列紧密地配合在各个目标解剖结构周围，需要提供高度的几何可调节性，同时易于处理和患者舒适。在这项工作中，这是通过构造一个线圈阵列来实现的，该线圈阵列是可拉伸的，使得它自动符合给定的解剖结构的形状和尺寸。通过由安装在弹性织物基底上的编织线形成线圈导体来实现可拉伸性。在3 T下通过MRI实验测量这样的线圈的信噪比产率，并且在调整和不调整每个线圈和相应的线圈之间的匹配的情况下研究线圈拉伸的信噪比效应。四通道和八通道阵列的可拉伸接收器线圈进行评估，以及在人体膝关节的体内成像。利用拉伸性，它表明，膝盖可以在不同的屈曲角度高达60度，同时保持紧密耦合的阵列检测，高信噪比，和整个关节的均匀覆盖下成像。Magn Reson Med，2012年。(c)2012 Wiley Periodicals，Inc.
To fit high-density receiver arrays for MRI closely around individual target anatomies, there is a need to provide a high degree of geometric adjustability with ease of handling and patient comfort. In this work, this is accomplished by the construction of a coil array that is stretchable such that it automatically conforms to a given anatomy's shape and size. Stretchability is implemented by creating the coil conductors from braided wire mounted on an elastic textile substrate. The signal-to-noise ratio yield of such coils is measured by MRI experiments at 3 T, and the signal-to-noise ratio effect of coil stretching is investigated with and without adjustment of the matching between each coil and the respective preamplifier. Four-channel and eight-channel arrays of stretchable receiver coils are evaluated in phantoms as well as for in vivo imaging of the human knee. Exploiting stretchability, it is demonstrated that the knee can be imaged under varying flexion angles up to 60 degrees while maintaining closely coupled array detection, high signal-to-noise ratio, and uniform coverage of the entire joint. Magn Reson Med, 2012. (c) 2012 Wiley Periodicals, Inc.