Abstract: Abstract］ ObjectiveTo explore the value of CT angiography(CTA) in the preoperative examination of radical gastrectomy. MethodsFiftyfour patients with gastric cancer who were confirmed by gastroscopy and proposed laparoscopic radical gastrectomy according to the inspection method were divided into two groups: 26 patients with the experimental group and 28 patients with the control group. All patients underwent abdominal CT examination before operation, and the patients in the experimental group were added with volume rendering techniques to generate threedimensional images of the gastric vessels, and all patients underwent laparoscopic radical gastrectomy for gastric cancer(D2). The operation and the number of lymph node dissection were compared between the 2 groups, and the variations of CTA in the peripheral vessels and the peripheral arteries were observed. ResultsIn the experimental group, 26 patients with gastric cancer were treated with laparoscopic radical gastrectomy, CTA for the left gastric artery, right gastroepiploic artery, common hepatic artery, properhepatic artery, and gastroduodenal artery could visualize at 100.0% and the right gastric artery at a percentage of 57.7%, and  left gastroepiploic artery at a percentage of 53.8%, CTA showed celiac axis and hepatic artery variation in 5 cases(19.2%) . The operation time and the amount of bleeding in the experimental group were less than those in the control group, the difference was statistically significant(P＜005). ConclusionFor patients with advanced gastric cancer undergoing laparoscopic surgery, preoperative CTA examination can accurately show the gastric vessels and mutation, tumor surrounding tissue relationship and degree of invasion, help to develop surgical procedures and to guide the operation of lymphatic dissection, effectively shorten the operation time, avoid damage to blood vessels, reduce the amount of intraoperative blood loss, and achieve a truly minimally invasive purposes.

Key words: stomach neoplasms, CT angiography, radical surgery, preoperative evaluation