信噪比是描述ＭＲＩ设备质量的重要参数。ＭＲＩ图像信噪比与多种因素有关 ,而且关系错综复杂 ,磁场的强度、ＲＦ线圈的质量、屏蔽效果、线圈调节、成像参数的选择等因素均会影响信噪比。-Signal-to-noise ratio is to describe the important parameters of MRI equipment quality. MRI images SNR related with many factors, and the complex relationship, t