永磁型磁共振扩散加权成像技术在临床脑部疾病的应用

Clinical Application Value of DWI Technique of the Permanent Magnetic MR Equipment in the Diagnosis of Brain Diseases

目的评价永磁型磁共振扩散加权成像在临床脑部疾病的应用价值。方法对27例脑部疾病(22例脑梗死,5例脑胶质瘤)的DWI序列图像与T1WI、T2WI、FLAIR序列图像进行比较分析。结果在DWI序列急性脑梗死100%表现为高信号,慢性脑梗死表现为等信号或略低信号,脑胶质瘤其瘤体表现为混杂信号而其周围的水肿表现为等信号。结论永磁型磁共振扩散加权像与T1WI、T2WI、FLAIR序列的图像相比能更早地发现急性脑梗死的异常信号,并且能区分急性及慢性脑梗死。此外,还有助于其他一些脑部疾病(如脑胶质瘤病)的诊断及鉴别诊断。

Objective To evaluate the clinical application value of diffusion weighted imaging,using permanent magnetic MR equipment in the diagnosis of brain diseases. Methods In 27 patients with brain diseases （22 cerebral infarction ,5 cerebral glioma）,its DWI findings were analyzed and compared with that of T1WI,T2WI and FLAIR. Results All the acute infarctions showed 100% hyperintense on DWI,chronic infarctions presented equal or shghfly hypointense,cerebral glioma presented chaotic signal and its edma showed equal signal. Conclusion It could more early find the abnormal signal on DWI in acute infarction,using the permanent magnetic MR equipment,than on T2WI FLAIR,and could differentiate acute infarction from chronic cerebral infarction. In addition,it is useful for the diagnosis and the differential diagnosis of other diseases such as cerebral glioma.