摘要
目的:探讨出血性脑梗死(HI)的MRI特征性表现和分型。方法:采用1.5T MR,对50例HI行常规序列扫描(T1WI、T2WI、FLAIR)。必要时行MRA(42例)、增强扫描(4例)及T2*WI(27例)。结果:根据梗死、出血的形态、部位进行MRI分型。Ⅰ型:脑叶HI:22例(44.0%)脑回状、斑片状出血位于皮层和/或皮层下白质。Ⅱ型:脑深部(基底节及丘脑)HI:17例(34.0%);Ⅲ型:小脑HI:14例(28.0%);斑片状、线状出血位于梗塞区内、边缘。混合型(Ⅰ型+Ⅱ型):3例(6%)。T2*WI呈低信号。结论:HI的MRI表现有一定特征性,与脑梗死部位、面积有密切关系。新的MRI分型有助于对HI发生机制的理解,从而指导临床治疗。T2*WI有助于HI的检出。
Objective:To assess the MR image characterization and classification of hemorrhagic infarction(HI). Methods:50 cases with HI were detected by 1.5T MR imaging. Routine MR/(T1WI, T2WI, FLAIR)were performed. Necessarily,42 cases used MRA and 27 cases were performed T2*WI. Results: According to the shape or position of infarction and hemorrhage, MRI type was typed T (44.0%). In 22 patients the HI limited in brain lobes, hemorrhage located in cortex and/or subcortical white matter with patch border or brain gyrus like Ⅱ (34.0%). In 17 patients HI limited in deep part of brain and HI located in deep part or boundary with patch border or line-like Ⅲ (28.0%). In 14 patients HI limited in cerebellum and HI located in deep part or boundary with patch border or line-like, mixed: (6%). In 3 patients HI involved brain lobe and deep part. T2 * WI showed low signal. Conclusion:There are typical manifestations of MRI in HI, and the new MRI type is useful to comprehend the development mechanism of HI and to guide clinical treatment. T2*WI is helpful to the detection of HI.
出处
《医学影像学杂志》
2009年第12期1508-1511,共4页
Journal of Medical Imaging
基金
河北省自然基金资助项目(C2006000927)
关键词
出血性脑梗死
磁共振成像
Hemorrhagic cerebral infarction
Magnetic resonance imaging