低场磁共振扩散加权成像在超急性期脑梗死的应用  

Application of low field MR diffusion weighted imaging in the diagnosis of superacute cerebral infarction

作　　者：李院华[1] 康红祥 胡爱生[1] 冯小燕[1] 郭文招 邓卫华[1] 刘勤敏[1] 王敏[1] 

机构地区：[1]遂川县人民医院CT、MRI室,江西343900

出　　处：《放射学实践》2014年第10期1155-1157,共3页Radiologic Practice

摘　　要：目的：评价低场磁共振的扩散加权成像（DWI）在超急性期脑梗死诊断上的应用价值。方法：用低场磁共振扩散加权成像诊断超急性期脑梗死36例，分析不同时间的影像学特点，并与常规 MRI 平扫进行比较。结果：低场磁共振DWI 能显示所有患者超急性脑梗死病灶，而有11例患者在常规 MRI 平扫上未发现异常，其中7例为发病2 h 内，4例为2～4 h。此外，DWI 还可发现发病1 h 内的脑梗死高信号灶，而且 DWI 显示的病灶范围较常规 T2 WI 显示的范围更大、信号更高。结论：颅脑低场强磁共振扩散成像可以诊断超急性期脑梗死，比 T2 WI、T2 FLAIR 平扫能更早显示病变，在发现病变、确定病变部位、病变范围具有较高的价值，可为临床早期治疗提供可靠的诊断依据。Objective：To evaluate the value of low field magnetic resonance diffusion weighted imaging （MR DWI）in the diagnosis of superacute cerebral infarction.Methods：Low field MR DWI was performed in 36 patients with superacute cerebral infarction,the imaging manifestations of various stages were analyzed and compared with that of conventional plain MRI.Results：All of the lesions in super acute cerebral infarction could be revealed on low field MR DWI.However,lesions could not be displayed on conventional plain MRI in 11 patients.Of which,7 cases were within 2h and 4 patients within 2h to 4h after onset.Whereas,low field DWI had the ability to display lesions within 1h after onset,which demonstrated as high signal intensity,and the lesions showed on DWI were larger and with higher signal intensity compared with that on conven-tional T2 WI.Conclusion：Superacute cerebral infarction could be diagnosed with low field MR DWI,which had the ability to show lesions earlier than T2 WI and T2 FLAIR,and was superior in displaying and localizing cerebral lesions as well as their extent,provides reliable basis for early clinical treatment.

关 键 词：脑梗死 磁共振成像 对比研究 

分 类 号：R445.2[医药卫生—影像医学与核医学] R743.33[医药卫生—诊断学]