正常胃的MRI表现与扫描技术

目的：研究正常胃的MRI表现和扫描技术。方法：在胃不同充盈状态下，采用单次屏气快速扫描序列，共进行72人次MRI平扫和7次增强检查，分析正常胃的MRI表现和图像质量。结果：按充盈程度不同，胃壁形态可分为扩张不良，适度扩张、充分扩张3型表现。MRI能较好显示胃及其与邻近器官的关系。胃壁厚度平均值在适度扩张下为2．7mm，在充分扩张下为2.4.T2WI图像均无运动伪影，79％的T1WI图像在使用解痉剂后无运动伪影。结论：采用单次屏气快速扫描序列，MRI能获得满意的胃部图像，较好显示胃及其与邻近解剖关系。

MR imaging appearances and scanning techniques of normal stomach

Objective:To study the MRI features and scanning technique of normal stomach.Methods:72 cases with normal stomach underwent MR imaging and 7 did additional enhanced MRI.MR imaging was obtained with single breath hold sequences when stomach was filled by different amount of water.MRI characteristics of normal stomach and image quality were analyzed.Results:According to the filling degree of stomach,the shape of the wall of stomach was classified into three types:insufficient distention,proper distention and full distention.MRI demonstrated clearly the stomach and the relationship with its adjacent organs.The average thickness of stomach wall was 2.7mm in proper dilatation and 2.4mm in full dilatation.All the T 2 weighted images obtained had no motion artifacts and there were no motion artifacts in 79% T 1 weighted images after hypotonic injection.Conclusion:The image quality of stomach with single breath hold MRI is superior.It can well demonstrate the anatomic relationship between the stomach and its adjacent organs.