任何一家医院的磁共振都会有不同程度的图像质量下降的经历，而影响图像质量的因素又很多，能够迅速准确地找出问题的所在并加以解决，对医院及患者均十分必要。笔者根据多年经验，总结出一个比较方便的噪声测试方法，适用于射频接收回路故障所导致的信噪比降低的情况。因... Magnetic resonance in any hospital will have different degrees of decline in image quality. There are many factors that affect image quality. It is very necessary for both hospitals and patients to be able to quickly and accurately identify the problems and resolve them. Based on years of experience, the author summarizes a convenient noise test method, which is applicable to the situation that the signal to noise ratio caused by the failure of the RF receiver circuit is reduced. because...