Department of Radiology, UCAIR, Salt Lake City, Utah, USA.
Magn Reson Med. 2013 Jan;69(1):295-302. doi: 10.1002/mrm.24247. Epub 2012 Mar 16.
In this study, a radio frequency phased array coil was built to image the breast in conjunction with a magnetic resonance guided high-intensity focused ultrasound (MRgHIFU) device designed specifically to treat the breast in a treatment cylinder with reduced water volume. The MRgHIFU breast coil was comprised of a 10-channel phased array coil placed around an MRgHIFU treatment cylinder where nearest-neighbor decoupling was achieved with capacitive decoupling in a shared leg. In addition a single loop coil was placed at the chest wall making a total of 11 channels. The radio frequency coil array design presented in this work was chosen based on ease of implementation, increased visualization into the treatment cylinder, image reconstruction speed, temporal resolution, and resulting signal-to-noise ratio profiles. This work presents a dedicated 11-channel coil for imaging of the breast tissue in the MRgHIFU setup without obstruction of the ultrasound beam and, specifically, compares its performance in signal-to-noise, overall imaging time, and temperature measurement accuracy to that of the standard single chest-loop coil typically used in breast MRgHIFU.
在这项研究中，构建了一个射频相控阵线圈，与专门设计用于在治疗缸中治疗乳房的磁共振引导高强度聚焦超声（MRgHIFU）设备结合使用，以减少水体积。MRgHIFU 乳房线圈由放置在 MRgHIFU 治疗缸周围的 10 通道相控阵线圈组成，在共享腿中实现了最近邻居去耦电容去耦。此外，在胸壁上放置了一个单匝线圈，总共 11 个通道。本工作中提出的射频线圈阵列设计基于易于实现、增加对治疗缸的可视化、图像重建速度、时间分辨率和产生的信噪比曲线。这项工作提出了一种专门用于在 MRgHIFU 设备中对乳房组织进行成像的 11 通道线圈，不会阻碍超声束，并且特别将其在信噪比、整体成像时间和温度测量精度方面的性能与通常用于乳房 MRgHIFU 的标准单胸环线圈进行了比较。
