MSCT血管成像三维重组对椎基底动脉延长扩张症的诊断价值

The diagnostic value of multi-slice three-dimensional CT angigrophy for Vertebrobasilar dodichoectasia

目的探讨多层螺旋CT(Mutlti-sliceCT MSCT)三维血管成像(MS 3D-CTA)在椎基底动脉延长扩张症(VBD)中的诊断价值。方法回顾性分析20例VBD患者的临床资料及MS—CTA表现。所有患者原始图像均采用容积重现(VR)、最大密度投影(MIP)及多平面重组(MPR)技术对图像进行三维重组。结果 20例VBD病例均显示椎基底动脉增粗、扩张、迂曲,测量其直径≧4.5mm,且分叉高于鞍上池或位置超出鞍背或斜坡范围,单纯型8例,骑跨型12例。VBD伴椎基底动脉壁钙化17例,脑干局部受压11例,后循环供血区梗死10例,蛛网膜下腔出血2例,脑积水5例。结论 VBD无特殊临床表现,MS 3D-CTA可以作为VBD诊断的首选影像检查方法。

Objective To evaluate puted tomography angiography（MS 3D-CTA）for cal data and MS 3D-CTA findings of 20 patients ing（VR）and maximum intensity projection（MIPi the diagnostic value of muti-slice three-dimensional com- vertebrobasilar dolichoectasia（VBD） . Methods The clini- with VBD were restropeetively analysed. Volume render- and muti--planner reconstruetion（MPR）were adopted to reconstruct 3D images in all cases. Results All the 20 patients had significantly thickened,ecstatic and tor- tosVertebrobasilar arteries whose diameters were large than or equal to 4. 5 mm and partial bifurcations were higer than the suprasellar cistern or locations were beyond the range of sellar dorsum or clivus. There were 2type of 20 cases with VBD,including simple type（n=8）and saddle type（n= 12）. Among 20 cases, VBD associated with califieation of basilar artery walls was found in 12 ,compression of brain stems in 11, lacunar infarction in posterior cerebral circulation area in 8, subarachnoid hemorrhage in 2,and hydroceph- alus in 5. Conclusions VBD had not special clinical features,MS 3D-CTA can be used as the best choice of diagnosing VBD.