脑血管周围间隙的MRI诊断  

MRI diagnosis of Virchow-Robin spaces

作　　者：张怡璐[1] 孟宪平[1] 冯东侠[1] 

机构地区：[1]东南大学医学院附属江阴医院放射科,江苏江阴214400

出　　处：《东南大学学报（医学版）》2011年第6期905-908,共4页Journal of Southeast University(Medical Science Edition)

摘　　要：目的:分析脑血管周围间隙(VRS)的MRI表现,以提高与其他疾病的鉴别诊断。方法:收集85例经MRI检查有VRS患者的成像资料并进行分析。所有患者均行MRI平扫和弥散加权成像,其中11例患者进行增强扫描。结果:VRS双侧或单侧显示,前联合基底节水平最多见,其次为大脑凸面半卵圆中心、外囊、脑干和小脑齿状核旁。前联合基底节水平VRS多为圆点形、椭圆形,大VRS病灶长轴与大脑中线夹角50～70°;在半卵圆中心病灶呈条状、点状,矢状位显示条状病灶呈"垂直"样;脑干病灶呈"裂隙样"条片状。所有的VRS信号与脑脊液信号一致,边界清楚锐利,DWI序列信号不高,弥散未受限,增强扫描未见明显强化。结论:大部分VRS的MRI表现具有特异性,容易与其他病变鉴别。Objective： To analyze MRI imaging characteristics of Virchow-Robin spaces（VRS）,so as to improve differential diagnosis with other diseases.Methods：85 cases of VRS were collected randomly,all patients underwent MRI routine scan and diffusion weighted imaging（DWI）,11 patients underwent enhanced MRI scan.Results：VRS showed bilateral or unilateral,anterior commissure of basal level was the most common,followed by semi oval center,external capsule,brain stem and cerebellar dentate nuclei next.In the anterior commissure of basal level,the lesions presented dot-shaped,oval,the angles between big VRS major axis and cerebrum midline were approximately 50-70°.Lesions shaped strip or dot in the semi-oval center,it was ＂vertical＂ like in sagital imaging;brain stem lesions were ＂crack-like＂.All lesions were isointens relative to CSF with clear borderline,and with no enhancement after injection contrast agent.Conclusion：Most VRS have some characteristic manifestations on MRI.It＇s easy to identify with other diseases.

关 键 词：脑血管周围间隙 磁共振成像 鉴别诊断 

分 类 号：R743[医药卫生—神经病学与精神病学] R814.42[医药卫生—临床医学]