MRI快速FLAIR技术在脑变性疾病中的应用

Fast fluid attenuated inversion recovery pulse sequence in MRI study of the brain degeneration

目的：探讨快速液体衰减反转回复（ＦＬＡＩＲ）序列在脑变性疾病中ＭＲＩ的诊断价值。材料与方法：应用０．５Ｔ超导ＭＲ系统对８例脑变性患者分别采用ＦＬＡＩＲ技术、快速自旋回波Ｔ２加权像（Ｔ２ＷＩ）进行对比分析。结果：ＦＬＡＩＲ序列比Ｔ２加权像能更敏感、更清楚地显示颅脑病变。结论：ＦＬＡＩＲ序列由于回波时间长产生重度Ｔ２图像，从而能增加病变对比度，显示Ｔ２加权像未能发现或可疑病灶。

Objective:To evaluate the diagnostic value of fast fluid-attenuated inversion recovery(FLAIR)pulse sequence in MRI study of the brain degeneration.Methods:Eight patients were studied with fast-FLAIR sequence and T2 weighted spin echo sequence respectively on 0.5 T superductive MR system.Ruselts:The lesions were demonstrated better on fast-FLAIR sequence than on turbo SE T2 weighted sequence.Conclusion:Using this sequence the long inversion time suppresses the signal from CSF and the long TE produces very heavy T2 weighting image and high lesion constrast,therefore it is of a diagnostic value for brain pathologies.FLAIR sequence is a supplement of SE sequence.