皮层下动脉硬化性脑病的MRI与MRA的对比分析

Comparison and Analysis between MRI and MRA on Subcortical Arteriosclerotic Encephalopathy

目的 探讨皮层下动脉硬化性脑病 (SAE)的MRI与MRA表现 ,并评价MRA表现与影像学分型之间的相关性。方法 37例经临床证实的SAE患者 ,对其进行MRI平扫及MRA检查 ,并对二者的检查结果进行统计学分析。结果 MRI表现为侧脑室前后角、体部周围、放射冠、半卵圆中心片状长T1长T2信号 ,其中影像学Ⅰ型 15例、Ⅱ型 15例、Ⅲ型 7例。其他征象包括脑萎缩、腔隙性脑梗塞、脑出血。MRA可见不同程度的脑动脉硬化 ,轻度 12例、中度 15例、重度 10例。结论 MRI可清楚显示SAE范围 ,MRA可观察动脉硬化的严重程度 ,并作为脑血管损害的证据。但本组资料所示影像学分型与MRA所见的动脉硬化严重程度之间缺乏相关性。

Objective To discuss the MRI and MRA appearance of subcortical arteriosclerotic Encephalopathy, and to evaluate the relativity between them.Methods Thirty seven patients that clinically proved SAE underwent MRI scan, and then MRA pictures reconstruction was performed. Results were analyzed statistically.Results MRI: Patches-like long T1 and long T2 signal areas could be seen around frontal, occipital horn and body of the lateral ventricle, corona radiate, Centrum semiovale, including 15 patients of first type, 15 patients of second type and 7 patients of third type. Other manifestations included brain atrophy, lacunar infarction and cerebral hemorrhage. MRA:Varied degree of cerebral arteriosclerosis was the main appearance on the pictures. Among them was the 12 mild , 15 moderate and 10 severe patients.Conclusion MRI could show the scope of SAE clearly, while MRA not only reveal the degree of cerebral arteriosclerosis but also can prove impair of the cerebral vessels. But this study failed to show the relativity between the type of imaging and degree of the cerebral arteriosclerosis.