颅内出血性病灶MRI扫描序列的优选研究

目的：探讨MR各序列成像在脑出血性病变的敏感性。方法：回顾性分析100例脑出血患者常规自旋回波（SE）T1WI、快速自旋回波（TSE）T1WI、液体衰减反转恢复序列（FLAIR）、扩散加权成像（DWI）和小角度激发快速梯度回波序列（T2—FFE）资料，比较SE—EPI、T2-FFE序列脑出血病灶的显示率，分析其信号特征，并探讨SE—EPI代替T2-FFE的可行性。结果：T2-FFE为显示脑出血性病灶最敏感的序列，能显示常规序列所不能显示的微出血。无论在检出脑出血灶，还是图像对比度，SE—EPI均远低于T2－FFE。结论：T2－FFE序列能提高脑出血病灶的检出数及早期诊断率，应作为常规扫描序列：在临床脑出血筛选方面，SE—EPI无法代替T2－FFE。

The optional MRI sequences in intracranial hemorrhagic lessons

Objective：To evaluate the most sensitive MR sequences in the detection and diagnosis of the intracranial hemorrhagic lessons.Methods：Retrospectively, 100 cases with intracranial hemorrhagic lessons were performed with MRI routine scan,FLAIR,DWI and T2-FFE sequences. The sensitivity of SE-EPI and T2-FFE in the hemorrhagic lessons was compared to determine whether the EPI sequences can be used as an alternative to the GRE sequence for detection of chronic hemorrhage. Results：T2-FFE was the most sensitive sequence in the detection of intracranial hemorrhagic lessons. T2-FFE could detect microbleeds which couldn＇t be displayed in the routine sequence, such as T1WI, T2WI, FLAIR. Compared to SE-EPI, T2-FFE had a better sensitivity, and the figure contrast was better also. Conclusion：T2-FFE sequence played an important role in the detection and diagnosis of intracranial hemorrhagic diseases, which made it necessary for the clinical MR examinations. And SE-EPI could not use to replace T2-FFE in the detection of hemorrhagic lessons, especially microbleeds.