Design of a SENSE-optimized high-sensitivity MRI receive coil for brain imaging
Design of a SENSE-optimized high-sensitivity MRI receive coil for brain imaging
复制标题
DOI：
10.1002/mrm.10169
复制
发表时间：
2002-06-01
影响因子：
3.3
通讯作者：
Duyn, JH
中科院分区：
文献类型：
--
作者：
de Zwart, JA;Ledden, PJ;Duyn, JH
研制了一种用于人脑感官磁共振成像的8通道仅接收检测器阵列。线圈几何结构基于间隙元件设计，并使用超高阻抗前置放大器实现元件的相互去耦。电场和磁场的计算机模拟表明，通过将线圈元件靠近磁头并保持元件之间的较大间隙，可以实现出色的信噪比（SNR）和SENSE性能。使用1.5 T的原型线圈进行的测量显示，与传统的正交鸟笼式接收线圈相比，在大脑上的平均信噪比提高了2.7倍，在速率-2和速率-3的SENSE上，平均几何噪声放大系数（g值）分别为1.06和1.38。
An 8-channel receive-only detector array was developed for SENSE MRI of human brain. The coil geometry was based on a gapped element design and used ultra-high impedance preamplifiers for mutual decoupling of the elements. Computer simulations of the electric and magnetic fields showed that excellent signal-to-noise ratio (SNR) and SENSE performance could be achieved by placing the coil elements close to the head and maintaining a substantial gap between the elements. Measurements with a 1.5 T prototype coil showed a 2.7-fold improvement of the SNR averaged over the brain compared to a conventional quadrature birdcage receive coil and an average geometrical noise amplification factor (g-value) of 1.06 and 1.38 for rate-2 and rate-3 SENSE, respectively.