多排螺旋CT评价腹主动脉闭塞

目的 探讨MSCT评估腹主动脉闭塞(AAO)的价值。方法 回顾性分析24例经腹主动脉CTA诊断为AAO的患者的临床及MSCT资料。观察AAO起始位置、闭塞范围、管壁情况、累及分支及侧支循环建立的情况。结果 24例中,急性AAO患者9例,闭塞范围为(60.9±25.4)mm,慢性15例,闭塞范围为(81.4±32.9)mm,差异有统计学意义(t=-3.05, P=0.03);AAO起始于肾动脉水平者7例,肾动脉以下水平者17例。AAO近端形态为中央缩窄型13例,条索样/线样型2例,水平截断型5例,偏心鼠尾型4例。19例腹主动脉壁见钙化、10例见附壁血栓形成。20例腹主动脉壁不均匀增厚,其中5例可见腹主动脉壁强化。结论 MSCT结合三维重组技术可用于评估闭塞腹主动脉情况。

Multiple-slice CT in assessment of abdominal aortic occlusion

Objective To analyze the value of MSCT in the assessment of abdominal aortic occlusion (AAO). Methods A retrospective analysis was performed to assess the clinical and MSCT imaging features of 24 patients with AAO diagnosed by MSCT angiography, and the initial segment of occlusive vessels, occlusion length, artery wall, involved avascular branches and the collateral circulations were observe and evaluated. Results Among the 24 cases, 9 cases were acute AAO, which occlusion length ranged from (60.9±25.4)mm, and 15 cases were chronic AAO, which occlusion length ranged from (81.4±32.9)mm, the difference was statistically significant (t=-3.05, P=0.03). The initial positions of the OAA can be divided into infra-renal (n=17) and renal occlusion (n=7). The AAO manifestations included central coarctation (n=13), linear coarctation (n=2), desected coarctation (n=5) and rat-tail sign (n=4). Calcification in the artery wall (n=19) and mural thrombi (n=10) were more likely to develop, 20 cases were with thicken and nonuniform artery wall, and five of them demonstrated enhancement. Conclusion The MSCT combined with three dimensional technique is an ideal and valuable tool for the diagnosis of AAO.