Gradient system is an important part of magnetic resonance imaging instrument,which is mainly used to generate gradient signals in three directions of X axis,Y axis and Z axis,so as to encode the magnetic resonance signal and determine the spatial position of the signal.The gradient system has high power and large heat dissipation,so the gradient coil and gradient amplifier need to be cooled.The failure of the gradient system and its cooling system will lead to the degradation of image quality and even equipment shutdown.This article summarized three cases of gradient system faults,including gradient coil water cooling system faults,gradient amplifier circuit faults and gradient amplifier cooling fan faults,and described the performance of three cases of failures,explored the causes of failures and gives troubleshooting methods for peer reference,with a view to jointly improving the maintenance level and equipment utilization.
关键词
磁共振成像仪/梯度线圈/梯度放大器/散热风扇
Key words
magnetic resonance imaging instrument/gradient coil/gradient amplifier/cooling fan
维普
万方数据