FLAIR序列与TSE序列在颅脑病变中的应用

MRI of the brain using FLARI and turboSE

目的：通过对头颅快速液体衰减翻转恢复序列与快速自旋回波序列的应用研究，了解其各自的特点及临床价值。材料与方法：65例颅内病变均用两种序列检查。快速FLAIR设置以脑脊液信号低于脑组织为准，即TR／TI／TE：9000／2500/110ms。快速SE：T1W：650／14ms、T2W：5217／110ms。结果：快速FLAJR检出病变1306个，敏感率98％；快速亚检出1164个，敏感率明88%（P＜0．05）。尤其在脑表面、半卵圆区、脑室旁快速FLAIR较快速SE更具优势，并且前者观察病变周围水肿极好。而在基底节区、后顾凹等处FLAIR不如快速SE敏感。结论：FLAIR优点较多但在有的部位不如快速亚，二种序列应互为补充。.

Objective: We performed fluid attenuated inversion recovery(FLAIR)and turboSE pulse sequences brain MRI to evaluate their characteristics and clinical application. Materials and Methods: 65 Patients with brain diseases were examined with both FLAIR(TR/TI/TE: 9000/2500/110ms) and turbeSE (T1W: 650/14ms; T2W: 5217/110ms) sequences. The signal of CSF in FLAIR images is lower than that of parenchyma with Parameter 9000/2500/100. Results: FLAIR detected more lesions in total than turboSE(1306 versus 1164). Its sensitivity is greater than turboSE(98% versus 88% . P＜0. 05). FLAIR is better than turboSE for subeortical/cortical, cerebral hemisphere and periventricular lesions both in sensitivity and in lesion conspicuousness. But for lesions at basal ganglia and posterior fossa, turboSE is more sensitive than FLAIR. Conclusion: FLAIR sequence shows its advantages. But for certain areas, it is less sensitive than turboSE. We consider that FLAIR should be a complementing modality to turboSE in brain MRI.