163例盆腔CTA的髂内动脉解剖分析

Internal iliac artery anatomy analysis of 163 cases based on pelvic CT angiography

目的 :利用CT血管成像(computed tomography angiography,CTA)观察成人髂内动脉分型及闭孔动脉、子宫动脉和前列腺动脉的起源。方法:回顾性分析163例因肾移植术前评估而行盆腔CTA检查的患者,以横轴位图像为基础结合多种重建图像评估髂内动脉分型,研究闭孔动脉、子宫动脉及前列腺动脉的起源。结果:CTA显示髂内动脉分型:A型(髂内动脉分为臀上动脉及臀下阴部干)占70.2%,B型(髂内动脉分为臀干及阴部内动脉)占28.3%,C型(髂内动脉以三叉的形式同时发出臀上动脉、臀下动脉及阴部内动脉)占1.5%。闭孔动脉起源以臀下阴部干最为常见,占27.6%,前列腺动脉及子宫动脉起源均以阴部内动脉最为常见,分别占38.5%、44.8%。结论:盆腔CTA能准确直观地显示髂内动脉分型及闭孔动脉、子宫动脉和前列腺动脉的起源。

Objective： To explore the radiological anatomy of classification of internal iliac arteries（IIAs） as well as variant origins of obturator artery（OA）, prostatic artery（PA） and uterine artery（UA） in adults based on CT angiography（CTA）. Methods： A total of163 patients undergoing pelvic CTA for vessel evaluation before kidney transplantation were retrospectively enrolled. Multiplanar reformation（MPR）, maximum-intensity-projection（MIP）, and volume-rendered（VR） based on axial images were performed on an off-line workstation. The origins of OA, PA and UA were studied. Results： Type A,B and C accounted for 70.2%, 28.3%, and 1.5% respectively. In addition, the most frequent OA origin was inferior gluteal and internal pudendal trunk（GPT）, accounting for 27.6%. The most frequent PA and UA origins were IPA, accounting for 38.5% and 44.8% respectively. Conclusion： Pelvic CTA examination can clearly display the classification of IIA, and variant origins of OA, PA and UA.