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, the strength of the magnetic field, the quality of the coil RF, shielding effect, coil ad