核磁共振扫描仪是利用射频脉冲序列对人体组织进行激励再利用检测线圈接收获得组织驰豫和质子密度等信号，经过计算机用相应的算法进行计算，从而产生ＭＲＩ图像。由于检测线圈所接收的人体核磁共振信号为纳瓦级，特别容易被外界信号干扰而使图像产生伪影，故不但扫描室要... MRI scanner uses radio frequency pulse sequence to excite human tissue and then uses the detection coil to receive signals such as tissue relaxation and proton density, and then uses a computer to calculate corresponding signals to generate MRI images. Since the human magnetic resonance signal received by the detection coil is a nanowatt level, it is particularly easy to be interfered with by external signals to cause artifacts in the image. Therefore, not only the scanning chamber should...