目的 :探讨术前仰卧位与俯卧位CT检查判断食管癌外侵主动脉的价值。材料与方法 :44例经病理学检查确诊的食管癌患者进行术前的CT检查及分析 ,用“夹角法”以及仰卧位与俯卧位相结合的方法—“联合法”进行判断 ,所有患者均有两种体位的CT检查及分析并与手术及术后病理学结果相对比。结果 :按照“夹角法” ,本组 44例病人主动脉受侵的敏感性 ,特异性及准确性分别为 76 92 %、 70 97%及 72 73% ;按照“联合法” ,主动脉受侵的敏感性、特异性及准确性分别为92 31%、 90 32 %及 90 91% ;(经X2 检验 ,两种方法相比 ,特异性与准确性P均小于 0 0 5 )。当俯卧位CT扫描时 ,若主动脉受侵 ,食管肿物与主动脉间可出现“融合征”。结论 :“联合法”判断食管癌外侵主动脉有一定的价值 ;在俯卧位CT检查时 ,“融合征”有助于帮助判断主动脉受侵 Objective: To investigate the value of preoperative supine and prone position CT examination to determine the invasion of esophageal cancer aorta. Materials and Methods: Forty-four patients with esophageal cancer diagnosed by pathology were examined by CT before operation. The patients were diagnosed by “angle method” and a combination of supine position and prone position - “combined method”. All patients There are two types of CT examination and analysis of the position and compared with the surgical and postoperative pathological results. Results: According to the included angle method, the sensitivity, specificity and accuracy of aorta invasion in 44 patients were 76 92%, 70 97% and 72 73% respectively. According to the “combined method”, the aorta The sensitivity, specificity and accuracy of invasion were 92 31%, 90 32% and 90 91%, respectively. (The specificity and accuracy of the two methods were all less than 0.05). When the prone position CT scan, if the aortic invasion, esophageal mass and the aorta may appear “fusion syndrome.” Conclusion: The “joint law” to determine the invasion of esophageal aorta has a certain value; in prone position CT examination, “fusion syndrome” helps to determine the aortic invasion