磁共振成像射频线圈技术

MRI radiofrequency coil technology

磁共振成像设备采集到的射频信号很弱,极易受到来自外界噪声的干扰,因此提高图像信噪比是磁共振成像的首要任务。而射频线圈作为信号接受链前端,则是信噪比的决定因素之一。本文首先分类探讨了射频线圈各种技术的基本原理,然后对它们的应用特点进行了阐述,并对影响线圈性能的参数进行了优化分析,旨在达到提高磁共振临床应用的质量控制、质量保证水平以及优化图像质量的目的。

The magnetic resonance imaging signal acquired from body is weak and easy to be interfered by noises. The radiofrequency coil, as the first stage of the receive chain, is the main factor of signal-to-noise ratio. This paper, firstly, discussed the basic principle and application characteristics of kinds of radiofrequency coils, then expatiated the parameters that affect the performance of coils.