磁共振成像设备伪影的形成机制及故障案例解决方案  

Formation Mechanism of magnetic resonance equipment artifacts and maintenance of fault cases

作　　者：井赛 王燕[1] 赵晓辰 汪鹏飞 Jing Sai;Wang Yan;Zhao Xiaochen;Wang Pengfei(Department of Medical Engineering,The 960^(th)Hospital of PLA Joint Logistics Support Force,Jinan 250012,China)

机构地区：[1]中国人民解放军联勤保障部队第960医院医学工程科,济南250012

出　　处：《中国医学装备》2024年第7期192-195,共4页China Medical Equipment

摘　　要：探讨磁共振成像(MRI)设备的静磁场伪影、运动伪影、化学位移伪影和卷褶伪影的形成机制,针对不同伪影故障和常见故障制定多种检修方式提出解决方案,分析伪影产生与主要因磁场强度异常、未优化序列和物理限度等因素有关,通过采取平面回避序列激发技术降低静磁场伪影发生率,利用螺旋桨成像技术消除运动伪影,降低氢质子信号干扰减少运动伪影出现率,扩大扫描视野方式抑制卷褶伪影,从而获得良好的共振图像效果,以降低MRI出现伪影概率,提高医疗检测检测准确率。To explore the formation mechanism of static magnetic field artifacts,motion artifacts,chemical shift artifacts and folding artifacts in magnetic resonance imaging(MRI)equipment,and to propose for different artifact failures and common faults using multiple maintenance methods.The artifacts were mainly related to the anomaly of the magnetic field strength,the unoptimized sequence,and the physical limits.The occurrence of static magnetic field artifacts was reduced by using plane avoidance sequence excitation technology,the motion artifacts were eliminated by propeller imaging technology,the occurrence rate of motion artifacts was reduced by reducing hydrogen proton signal interference,and the fold artifacts were suppressed by expanding the scanning field of view,in order to obtain a good resonance image effect and reduce the probability of MRI artifacts,improve the accuracy of medical detection.

关 键 词：磁共振成像(MRI) 图像伪影 形成机制 故障分析 

分 类 号：R445.2[医药卫生—影像医学与核医学]