摘要
目的探讨磁共振弥散成像(DWI)和3D-TOF法血管成像(MRA)在脑梗死中临床诊断价值,区分多发梗死灶中急性和非急性方面的能力,尤其是超早期脑梗死诊断和治疗中的作用。方法对72例脑梗死发病不同时间的病例行常规MRI、DWI序列及3D-TOF血管成像扫描,并根据发病时间进行分期比较及分析。结果MRI平扫T2加权像在发病12 h后才能隐约见到稍高信号的病灶,而DWI最早可在发病2 h发现缺血灶,3D-TOF血管成像不仅能显示脑动脉的狭窄、闭塞、动脉硬化还能显示侧枝循环情况。结论DWI可以明确诊断急性,尤其是超早期脑梗死,3D-TOF技术MRA可快速而准确地显示颅内动脉狭窄或闭塞及其相应的脑梗死,2者结合对治疗方案的制定与调整及评价疗效均有重要意义。
Objective To investigate the value of DWI and 3D-TOF MRA in clinical diagnosis of brain infarction, their ability in the differentiation of acute and non-acute infarction foci and their role in identification and treatment of hyper-acute cases. Methods 72 cases of brain infarction with different duration after onset were studied with MRI, DWI and 3D-TOF MRA. Comparisons and analyses were made among different groups of the patients, staged according to the length of time after the onset of the disease. Results In general, MRI could find the infarcted loci with a lit- tle bit high signal intensity rather indistinctly on T2-weighted images, 12 hours after the onset. DWI could find the ischemic loci as early as 2 hours after the onset. Narrowness, occlusion and atherosclerotic lesions of the brain arteries as well as their collateral circulation could be depicted on 3D-TOF MRA images, Conclusions DWI is able to confirm the diagnosis of brain infarction especially at the hyper-acute stage. Stenosis, occlusion of brain arteries and the corresponding infartion loci could be accurately and promptly shown with 3D-TOF MRA. These two imaging methods combined with routine MRI are essential to the planning and regulation of therapeutic arrangements and important to the evaluation of therapeutic effect.
出处
《实用临床医药杂志》
CAS
2006年第3期53-55,共3页
Journal of Clinical Medicine in Practice
