摘要
目的评价MR磁敏感加权成像(SWI)在脑发育性静脉异常(DVA)的应用价值。方法回顾性分析30例经磁共振诊断为脑静脉异常的患者MR表现,行常规MR扫描、增强扫描及SWI,10例加做MRA扫描。结果平扫5例DVA引流静脉呈条状稍长T_1、稍长T_2信号,3例呈长T_1、短T_2流空信号,22例显示不清,10例MRA显示引流静脉呈条状血管影,30例DVA增强扫描显示引流静脉及髓静脉强化,呈高信号"海蛇头"征,SWI也同时显示引流静脉及髓静脉,呈特征性"海蛇头"状低信号。结论常规MR序列显示DVA引流静脉不佳,增强扫描及SWI可同时显示引流静脉与髓静脉,SWI显示更佳,可作为诊断DVA的常规序列。
Objective To evaluate susceptibility-weighted imaging for diagnosing developmental venous anomaly （DVA）. Methods The conventional MRI （30）, SWI （30） and MRV （10） of 30 patients with diagnosis of DVA on MRI were retrospectively analyzed. Results On unenhanced MRI draining veins were clearly demonstrated as hypointensity on TIWI and T2WI in 3 cases, hypointensity on T,WI and hyperintensity on T2WI in 5 cases. In 22 patients the draining veins were not seen. MRV showed the draining veins in all 10 patients. On contrast-enhanced MRI, medullary and draining veins were enhanced with the characteristic hyperintense caput medusa appearance. Hypointense caput medusa pattern was visible on SWI. Conclusions The draining veins of DVA were not well shown on conventional MRI but clearly demonstrated on contrast-enhanced MRI and SWI. More medullary veins are visible on SWI, which is valuable for diagnosing DVA.
出处
《影像诊断与介入放射学》
2013年第3期167-170,共4页
Diagnostic Imaging & Interventional Radiology
关键词
静脉畸形
脑
磁共振成像
磁敏感成像
Developmental venous anomaly
Brain
Magnetic resonance imaging
Susceptibility weighted imaging
