正常人副中结肠动脉的多层螺旋CT增强扫描研究

目的:观察分析正常人群中副中结肠动脉(AMCA)的发生率及分布规律.方法:采用回顾性研究方法,收集2021年1月至6月在上海瑞金医院北部院区同时进行上下腹增强CT检查的正常人群331例,发现存在AMCA者97例.将检查的静脉期原始图像进行多平面重建,记录AMCA起源、伴行静脉及与胰腺毗邻关系,并测量AMCA起始点直径,...

Study on Multi-slice Spiral CT Enhanced Scanning of Accessory Middle Colonic Artery in Normal Population

Objective: To evaluate the incidence and patterns of AMCA amony normal population. Methods: 331 cases of normal people who underwent Abdomen & Pelvis enhanced CT scan in RuiJin Hospital North Area from January, 2021 to June, 2021 were retrospectively collected for the present study and 97 cases were found to have got AMCA. Multiplanar reconstruction was performed on the original images of venous phase to record how the AMCA originated and the adjacency relationship between the accompanying veins and pancreas. The diameter of AMCA starting point and the distance to the nearest point of pancreas were also measured. Results: The incidence of AMCA was 29.3％ (97/331). Among the 97 cases, 66.0％ (64/97) occurred in superior mesenteric artery, 17.5％ (17/97) occurred in inferior mesenteric artery and 6.5％(16/97) occurred in inferior pancreaticoduodenal artery. The average diameter of AMCA was (2.0±0.24)mm, the minimum distance to pancreas was (2.1±1.4)mm. Accompanying vein was observed in all the 97 AMCA cases, 72.2％ (70/97) converged towards inferior mesenteric vein, 20.6％ (20/97) converged towards superior mesenteric vein, 6.2％ (6/97) converged towards splenic vein, and 1％ (1/97) converged towards jejunal vein. Conclusion: Multi-slice spiral CT contrast enhancement scan can clearly show the origin and the adjacency relationship between the accompanying veins and pancreas of ACMA. It can provide accurate evaluation of blood vessels before operation.