分析射频和核磁共振信号排除射频单元故障

Analysis of removing the RF-unit's malfunction by using RF-signal and MR-signal

目的探讨利用射频信号和核磁共振信号排除射频单元故障的可行性 ,为MRI系统射频单元故障的及时排除提供更为便捷的方法。方法MRI系统工作正常时 ,测量并记录部分射频信号和核磁共振信号VNormal。当射频单元发生故障时再测量记录上述信号VBlooey ,通过对比分析 ,分段排除并最终确定故障原因。结果17次射频单元故障 ,利用上述对比分析、分段排除的方法均准确查到故障原因。结论利用射频信号和核磁共振信号能够准确、快速地查找射频单元的故障发生点。

Objective To investigate the feasibility of removing the RF-unit's malfunction by using RF-signal and MR-signal,and provide a more convenient method of removing the RF-unit's malfunction for MRI system timely.Methods RF-signal and MR-signal are separately measured when the MRI system is normal(noted as VNormal)and manufunction(noted as VBlooey),then both kinds of signal are compared and the blooey reason would be found finally.Results17blooey reasons of RF-unit had been found by the method.Conclusion The blooey point can be exactly and rapidly found by using RF-signal and MR-signal.