低场MRIFLAIR序列在后颅窝病变中的应用

目的:探讨低场MRI液体衰减反转恢复(fluid attenuated inversion recovery,FLAIR)序列在后颅窝病变的应用价值。方法:对80例后颅窝疾病患者同时行常规MR T2加权像及快速FLAIR检查,比较两种序列对病灶的显示情况,同时对CT结果对照。结果:FLAIR共检出病灶235个,常规T2加权像检出152个,CT仅显示107个。FLAIR显示病灶清晰,特别可显示常规MR T2加权像及CT未能显示的脑梗死及颅底池及脑表面的小出血病灶等,在诊断后颅窝外伤及蛛网膜下腔出血等方面具有明显的优势。结论:FLAIR对后颅窝病变具有较好的诊断价值,应作为常规应用。

The Clinical Application of Low-field Intensity MRI with FLAIR Sequency in Fossa Cranialis Posterior Diseases

Objective To investigate the value and clinical application of low-field intensity MRI with fluid-attenuated inversion-recovery （FLAIR） sequency in fossa cranialis posterior disease. Methods 80 patients were studied with conventional MR T2WI and FLAIR and CT simutaneousty. The presentation of the lesions were compared. Results 235 lesions were displayed with FLAIR and 152 with conventional T2WI,107 with CT only . The lesions were clearer in FLAIR than those showed in T2WI or CT. Small hemorrhagic foci in cistern can be easily shown in FLAIR and cannot be done in conventional T2WI or CT： FLAIR was particular of superiority to demonstrate infarction and trauma and subarachnoid haemorrhage. Conclusion FLAIR is useful to fossa cranialis posterior disease and every cases should be done with it.