摘要
目的:观察总结血管周围间隙和腔隙性梗死灶在磁共振上的表现特点,以鉴别两种疾病,提高确诊率。方法:选择经临床随访并证实的腔隙性脑梗死患者50例及血管周围间隙患者40例作为研究对象,综合对比分析其磁共振影像形态、大小、部位、边界、信号、占位效应等表现。结果:VRS在MRI上表现为边界清楚的圆形、卵圆形或线状、管状结构,与穿支血管走行一致,在T1WI为低信号,T2WI为高信号,FLAIR序列为低信号,无对比剂增强效应和占位效应。腔隙性梗死灶在T1WI呈低信号,T2WI呈高信号;在FLAIR序列上表达高信号,慢性期为低信号,周围可见薄边高信号影;在DWI急性期呈高信号,随时间推移信号减低,变为等信号、低信号,MRI增强扫描周围见轻度环形强化或无强化。结论:在磁共振影像上,可通过观察病灶信号、形态和序列等对血管周围间隙和腔隙性梗死灶进行鉴别诊断。
Objective： To summarize the MRI features of Virchow-Robin spaces （ VRS ） and lacunar infarction （ LI ） for the differentiation of the two diseases and the improvement of diagnostic rate.Method： 50 confirmed LI patients and 40 VRS patients were selected as the research objects.Their MRI features in respects of shape, size, position, boundary, signal and space occupying effect were compared and analyzed.Result： The VRS featured round, oval, linear or tubular shapes with clear boundary and it had the same direction with the perforator vessels.Their signals were low on T1WI, high on T2WI and low on FLAIR sequences without the enhancement effect of contrast agent and the space occupying effect.By contrast, the LI signals were low on T1WI, high on T2WI and high on FLAIR sequences, in chronic phase they were low signals surrounded by high signal zone with thin edge.In acute stage, the DWI featured high signals which decayed gradually to equal or low ones.The ring-like enhancement or no enhancement was visible with contrast-enhanced MRI scanning.Conclusion： VRS and LI can be differentiated and diagnosed by observation of signal, shape and sequences of magnetic resonance images.
出处
《中国医学创新》
CAS
2016年第8期68-71,共4页
Medical Innovation of China
关键词
血管周围间隙
腔隙性梗死灶
核磁共振技术
鉴别诊断
Virchow-Robin spaces
Lacunar infarction
Magnetic resonance technology
Differential diagnosis
