DWI在急性脑梗死中诊断价值.docVIP

DWI在急性脑梗死中诊断价值[摘要] 目的 探讨扩散加权成像（DWI）技术在急性脑梗死中的临床诊断价值。 方法 收集418例急性脑梗死患者的MRI表现进行分析，全部均进行了SETT1WI、FSET2WI、T2-FLAIR及DWI检查，并对发病时间进行分期。 结果 418例脑梗死病例中，超急性期28例，急性期331例，亚急性期59例，DW I均显示为高信号。 结论 DW I早期诊断脑梗死敏感度高，具有较高临床价值，在超急性脑梗死可显示常规MRI上不能显示的病灶，为临床早期诊断及对脑梗死预后的评估提供可靠依据。 [关键词] 急性脑梗死；磁共振成像；弥散加权 [中图分类号] R445.2；R743.33 [文献标识码] B [文章编号] 1673-9701（2012）06-0101-02 Value of diffusion weighted imaging in the diagnosis of acute cerebral infarction LIN Xiaoqiang Department of Radiology, the Hospital of Liuzhou Iron and Steel Co in Guangxi Zhuang Autonomous Region, Liuzhou 545002, China [Abstract] Objective To study the value of diffusion weighted imaging (DWI) in the diagnosis of acute cerebral infarction (ACI). Methods Data of magnetic resonance imaging (MRI) about 418 patients with ACI was analyzed.All the people were examined with SETT1WI, FSET2WI, T2-FLAIR and DWI.And they were staged by the starting time of the disease. Results Among the 418 patients of ACI, there were 28 patients in the super acute period, 331 patients in the acute stage, and 59 patients in the subacute stage. All the patients showed high DWI. Conclusion The sensibility of DWI to diagnosising the early stage cerebral infarction is high. And the clinical value is high.The DWI can show lesions which cannot be show with the MRI. DWI can provide dependable basis for early clinical diagnosis and evaluating prognosis of cerebral infarction. [Key words] Acute cerebral infarction; Magnetic resonance imaging (MRI); Diffusion weighted imaging (DWI) 脑梗死是由于脑缺血形成的组织坏死，在神经系统中具有高发病率、高死亡率、高致残率等特点，严重危害人类生命健康。如何对其早期诊断和治疗，尤其是发病6 h内的诊断及治疗关系到患者预后。脑梗死的早期诊断及治疗是人类普遍关心的问题。CT及常规MRI技术诊断6 h内的脑梗死目前没有满意效果。磁共振扩散加权成像（diffusion weighted imaging，DWI）是目前能在活体上进行水分子扩散测量与成像的唯一方法[1]，能反映人体活组织的微观几何结构、细胞内外水分子的转移与跨膜运动等变化。神经系统中扩散成像技术主要用于急性脑缺血诊断与评价。笔者通过对我院418例急性脑梗死的扩散加权（DWI）及表面扩散系数（apparent diffusion coefficient，ADC）图进行定性和定量分析，探讨DWI在急性脑梗死中的诊断价值。 1 资料与方法 搜集本院自 2010年5月~2011年11月行MRI扫描的脑梗死患者418例 ，男294例，女124例，年龄 23～93岁，平均67岁，全部诊断为脑梗死。采用S