Objective To observe the anatomical variations of coeliac trunk and superior mesenteric artery with MSCTA. Methods One thousand patients who underwent enhanced CT scanning and CTA were selected. VR, MIP and MPR were used to observe the origin and course of coeliac trunk, superior mesenteric artery (SMA) and their branches. Results Of 1000 patients, 880 (88.00%) had normal anatomical configuration (Michels type I), while 120 cases (12.00%) were found with various types of anatomical variations. In these variations, 72 (7. 20%) were belonging to the classic Michels type Ⅱ-Ⅹ, the remaining 48 cases (4.8%) were not, including celiomesenteric trunk in 31 cases (3. 10%), splenic artery originated from SMA in 5 (0.50%), gastroduodenal artery originated from SMA and splenic artery in 3 cases (0.30%), respectively, and originated from left hepatic artery in 1 case (0.10%), absence of the celiac trunk in 2 (0. 20%) , left gastric artery originated from abdominal aorta, splenic artery and proper hepatic artery in 1 case (0. 10%) , respectively. Conclusion Widespread anatomical variations of celiac trunk and SMA may exist. MSCTA can contribute to understand the details of these variations and guide treatment plan for abdominal vascular surgery.%目的 采用MSCTA评价腹腔干与肠系膜上动脉及其主要分支的解剖变异.方法 收集1000例患者的MSCTA,进行VR、MIP和MPR,观察腹腔干与肠系膜上动脉及其主要分支的起源和走行.结果 1000例患者中,880例(88.00％)属于正常解剖学类型(Michels I型),120例(12.00％)存在不同类型的解剖变异,其中72例(7.20％)属于MichelsⅡ～X型；48例(4.80％)不属于Michels分型,包括腹腔干-肠系膜上动脉共干31例(3.10％),脾动脉起源于肠系膜上动脉5例(0.50％),胃十二指肠动脉起源于肠系膜上动脉和脾动脉各3例(0.30％)、肝左动脉1例(0.10％),腹腔干缺如2例(0.20％),胃左动脉起源于腹主动脉、脾动脉和肝固有动脉各1例(0.10％).结论 腹腔干与肠系膜上动脉存在广泛的解剖学变异；MSCTA有助于了解变异情况,对腹部血管外科手术具有指导意义.
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