颅脑MRI快速液体衰减反转回复技术探讨  

MRI study the brain using fast fluid attenuated inversion recovery pulse sequence

作　　者：黄美萍[1,2] 王学建[1,2] 梁长虹[1,2] 沈桂权 陈乃楹 魏渝清[1,2] 黄飙[1,2] 李小宝 郑君慧 李东方[1,2] 谭绍恒[1,2] 史黔华 

机构地区：[1]广东省人民医院放射科 [2]贵阳医学院附属医院放射科

出　　处：《中华放射学杂志》1997年第6期379-383,共5页Chinese Journal of Radiology

摘　　要：目的：探讨快速液体衰减反转回复（ＦＬＡＩＲ）技术原理及其在颅脑的临床应用。材料与方法：对４０例健康志愿者及１２４例颅脑疾患患者前瞻性地进行快速ＦＬＡＩＲ及Ｔ２加权序列ＭＲ检查，并比较了快速ＦＬＡＩＲ上不同ＴＲ、ＴＩ（间隔时间）、ＴＥ组合所得图像质量。结果：ＴＲ／ＴＩ／ＴＥ为８０００／２０００／２００毫秒的组合能较好地抑制脑脊液信号。ＦＬＡＩＲ与快速自旋回波Ｔ２加权序列比较，能增加病灶的对比度，从而更敏感地发现病变，以及更易于把握病变的侵袭范围。结论：ＦＬＡＩＲ技术对颅脑病变的显示优于快速ＳＥＴ２加权序列，可作为其补充手段。Purpose: To evaluate the clinical application of fast fluid attenuated inversion recovery (FLAIR) pulse sequence in MRI study of the brain. Materials and methods: Forty cases of normal brain and 124 cases with various brain pathologies were studied with fast FLAIR sequence and T 2 weighted spin echo sequence prospectively. The results were compared in terms of image quality and lesion detectability. Results: We found that the parameter group (TR/TI/TE: 8 000/2 000/ 2 00 ms ) of the fast FLAIR could suppress CSF signal effectively, and more lesions were displayed on FLAIR images than on turbo SE T 2 weighted images. The extent of the lesions and the contrast between lesions and normal brain tissue were demonstrated better with fast FLAIR sequence. The manifestations of the normal brain on fast FLAIR images were also described. Conclusion: The lesions in the brain were demonstrated on fast FLAIR sequence better than on turbo SE T 2 weighted sequence, and fast FLAIR could be a complementing modality to display lesions in the brain.

关 键 词：脑 成像 MRI FLAIR 

分 类 号：R445.2[医药卫生—影像医学与核医学] R741.044[医药卫生—诊断学]