A MRI Rotary Phased Array Head Coil
A MRI Rotary Phased Array Head Coil
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DOI：
10.1109/tbcas.2012.2230173
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发表时间：
2013-02
影响因子：
5.1
通讯作者：
B. Li;E. Weber;S. Crozier
中科院分区：
文献类型：
--
作者：
B. Li;E. Weber;S. Crozier
提出了一种新的旋转相控阵(RPA)头线圈，它可以提供与体积射频线圈相当的均匀脑图像，用于磁共振脑成像应用。RPA磁头线圈的设计不同于传统的周向阵列设计方法，因为RPA磁头线圈的线圈元件具有由位于相对两侧的一对主导体组成、在磁头周围和磁头上方等角地插入的“桨状”结构。构建了2T纯接收4元RPA磁头线圈样机，并与传统的4元接收相控阵磁头线圈和商用纯接收正交鸟笼磁头线圈进行了对比实验。RPA磁头线圈采集的均匀体模图像显示，与传统的相控阵磁头线圈相比，体模中心深处的信号强度得到了改善，这一改进使RPA磁头线圈能够获得与鸟笼头部线圈采集的脑图像相似的均匀脑图像。此外，部分平行成像与RPA磁头线圈结合使用，以实现快速成像。
A new rotary phased array (RPA) head coil that can provide homogenous brain images comparable to volumetric radiofrequency coils is proposed for magnetic resonance brain imaging applications. The design of the RPA head coil is a departure from conventional circumferential array design method, as coil elements of the RPA head coil have a “paddle-like” structure consisting of a pair of main conductors located on opposite sides, inserted equi-angularly around and over the head. A prototype 2T receive-only 4-element RPA head coil was constructed and experimentally tested against a conventional receive-only 4-element phased array head coil and a commercial receive-only quadrature birdcage head coil. Homogenous phantom images acquired by the RPA head coil show that signal intensity deep at the center of the phantom was improved as compared to the conventional phased array head coil and this improvement allow the RPA head coil to acquire homogenous brain images similar to brain images acquired with the birdcage head coil. In addition, partial parallel imaging was used in conjunction with the RPA head coil to enable rapid imaging.