Adriany Gregor, Van de Moortele Pierre-Francois, Ritter Johannes, Moeller Steen, Auerbach Edward J, Akgün Can, Snyder Carl J, Vaughan Thomas, Uğurbil Kâmil
Center for Magnetic Resonance Research, Department of Radiology, School of Medicine, University of Minnesota, Minneapolis, USA 55455, USA.
Magn Reson Med. 2008 Mar;59(3):590-7. doi: 10.1002/mrm.21488.
A novel geometrically adjustable transceiver array system is presented. A key feature of the geometrically adjustable array was the introduction of decoupling capacitors that allow for automatic change in capacitance dependent on neighboring resonant element distance. The 16-element head array version of such an adjustable coil based on transmission line technology was compared to fixed geometry transmission line arrays (TLAs) of various sizes at 7T. The focus of this comparison was on parallel imaging performance, RF transmit efficiency, and signal-to-noise ratio (SNR). Significant gains in parallel imaging performance and SNR were observed for the new coil and attributed to its adjustability and to the design of the individual elements with a three-sided ground plane.
本文提出了一种新型的几何可调节收发器阵列系统。几何可调节阵列的一个关键特性是引入了去耦电容器，该电容器能够根据相邻谐振元件的距离自动改变电容。基于传输线技术的这种可调节线圈的16元头部阵列版本，在7T磁场下与各种尺寸的固定几何形状传输线阵列（TLA）进行了比较。该比较的重点在于并行成像性能、射频发射效率和信噪比（SNR）。观察到新线圈在并行成像性能和SNR方面有显著提升，这归因于其可调节性以及采用三边接地平面的单个元件设计。
