低场强MRI T2^＊ WI FFE序列在颅脑血管性及出血性疾病中的应用研究

目的：探讨低场强MRI T2＊WI FFE序列成像在颅脑血管性及出血性病变检查中的敏感性。方法：分析110例临床可疑颅脑出血患者的常规MRI序列,包括自旋回波（SE）T1WI、快速自旋回波（TSE）T2WI、液体衰减反转恢复序列（T2-FLAIR）,以及T2＊快速场回波序列（T2＊WI FFE）资料,比较常规序列、T2＊WI FFE序列对颅脑出血病灶的显示率,分析其信号特征,并探讨T2＊WIFFE序列的可行性。结果：T2＊WI FFE序列为显示颅脑出血灶最敏感的序列,能显示常规序列所不能显示的脑微出血。无论在检出脑出血灶,还是图像信噪比,T2＊WI FFE均能满足临床需求。结论：低场强MRI T2＊WI FFE序列能明显提高颅脑出血灶的检出率,进而提高颅脑血管性及出血性疾病的早期诊断率。其在临床颅脑出血筛选方面具有常规MRI序列无法替代的作用。

Application Research of Low-field MRI T_2~＊ WI FFE Sequence on Cerebrovascular and Hemorrhagic Disease

Objective：To explore the inspection sensitivity of the low-field MRI T＊2WI FFE sequence imaging in cerebrovascular and hemorrhagic disease.Methods： 110 patients with suspected brain hemorrhage were performed conventional MRI ,including the spin-echo （SE） T1WI,fast spin-echo （TSE） T2WI,fluid-attenuated inversion recovery sequence （T2-FLAIR）,and T＊2 fast field-echo sequence （T＊2WI FFE） data in which display rate in hemorrhage lesions of conventional sequences,T＊2WI FFE sequence were compared ,signal characteristic was analysed,and the feasible of T＊2WI FFE sequence was explored.Results： T＊2WI FFE sequence showed the most sensitive sequence of brain hemorrhage,can show cerebral microbleeds which can＇t be shown in normal sequence.T＊2WI FFE can meet clinical needs in detection of cerebral hemorrhage,or the image signal to noise ratio.Conclusion：Low-field MRI T＊2WI FFE sequence can significantly improve the detection rate of brain hemorrhage,increase early diagnosis of brain vascular and hemorrhagic disease .Low-field MRI T＊2WI FFE sequence should be regarded as a regular scan sequence which has an irreplaceable role in routine MRI screening.