我院引进日本东芝公司MRT—22A型磁共振成象装置。投入运行半年后出现溢出故障,经长期多次检修才得以排除。故障原因却是“地线”问题。一、故障现象当使用T_2加权自旋回波SE(重复时间T_R=2000ms,回波时间T_E=80ms,层厚=5mm多层扫描时,常出现信号区强度变弱,非信号区出现信号,样态有如月晕,好象信号从信号区流到非信号区,故谓之“谥出”(OVER FLOW)。 Our hospital introduced the Japanese company Toshiba MRT-22A magnetic resonance imaging device. Put into operation after six months overflow failure, after many long-term overhaul to be ruled out. The reason for the fault is the “ground” problem. First, the fault phenomenon When using T_2 weighted spin echo SE (repeat time T_R = 2000ms, echo time T_E = 80ms, layer thickness = 5mm multi-layer scan, often appear weak signal area, non-signal area signal, like State such as moon halo, as if the signal flow from the signal area to non-signal area, so that the “谥 out” (OVER FLOW).