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］目的：ＣＴ仿真胃镜与纤维胃镜、钡餐造影、手术对比，研究其临床价值及其在理想状态下，可辨别的最小病变。材料与方法：２１例患者及两个离体新鲜胃标本，用相同扫描条件扫描。在工作站进行后处理，形成ＣＴ仿真胃镜（ＣＴ ｖｉｒ－ｔｕａｌ ｇａｓｔｒｏｓｃｏｐｙ ＣＴＶＧ）和胃ＳＳＤ影像，与纤维胃镜、气钡双对比造影（ＤＣ）、手术标本进行对比。结果： ＣＴＶＧ和胃ＳＳＤ影像对恶性肿瘤，溃疡、息肉、外压性改变诊断率相当于或高于纤维胃镜和ＤＣ，但对胃炎的诊断率较低，ＣＴＶＧ可以发现０．３ｃｍ以上的病变，但对扁平性、浅凹陷性病变敏感性低。结论：ＣＴ仿真胃镜是对钡餐造影和纤维胃镜很好补充，ＣＴ仿真胃镜与ＣＴ轴位结合可以对上消化道疾病作出更准确的诊断。
Objective: CT virtual endoscopy and fiber endoscopy, barium meal angiography, surgery contrast, to study its clinical value and in the ideal state, the smallest lesions can be identified. Materials and Methods: Twenty-one patients and two fresh gastric specimens were scanned with the same scanning conditions. After processing at the workstation, CT virtual gastroscopy (CTVG) and gastric SSD images were formed, and compared with fiber endoscopy, double contrast angiography (DC) and surgical specimens. Results: The diagnostic rates of malignant tumors, ulcers, polyps and external pressure changes of CTVG and gastric SSD images were the same as or higher than those of fiber endoscopy and DC, but the diagnosis rate of gastritis was low. CTVG could detect more than 0.3cm of lesions, But flat, shallow depression lesions low sensitivity. Conclusion: CT simulated gastroscopy is a good supplement to barium meal angiography and fiber endoscopy, CT virtual endoscopy and CT axial position can make a more accurate diagnosis of upper gastrointestinal diseases.