颅脑MRI快速液体衰减反转回复技术探讨

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

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

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.