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目的：探讨ＣＴ诊断胃癌侵犯深度、浆膜受侵、淋巴结转移及ＣＴ分期与病理分期对照的准确性。方法：３５例胃癌患者术前行ＣＴ扫描。检查前患者口服饮用水１０００ｍｌ。先以８ｍｍ层厚、间隔平扫，然后就病灶区以４ｍｍ层厚、间隔薄层扫描，并同时静脉团注增强。结果：胃癌病灶ＣＴ总的检出率为９４．４％，早期胃癌检出率为５０％，中晚期胃癌检出率为１００％。ＣＴ诊断胃癌侵犯深度、浆膜受侵、淋巴结转移的准确性分别为７９．４％、８５．３％、７１．９％。ＣＴ分期与病理分期对照的准确性为７７．１％。结论：使用水为胃内对比剂并结合局部薄层团注增强扫描方法，可明显提高ＣＴ机对胃癌浆膜侵犯、Ｎ２组淋巴结转移诊断的准确性，可为临床治疗提供有价值的信息。
Objective: To investigate the accuracy of CT in the diagnosis of gastric cancer invasion depth, serosa invasion, lymph node metastasis and CT staging and pathological staging. Methods: 35 cases of gastric cancer patients underwent preoperative CT scan. Before examination, patients with oral drinking water 1000ml. First with 8mm layer thickness, interval scan, and then the lesion area to 4mm layer thickness, thin layer interval scan, and at the same time intravenous bolus enhanced. Results: The total detection rate of CT in gastric cancer was 94.4%, the detection rate of early gastric cancer was 50%, and the detection rate of middle and late gastric cancer was 100%. The accuracy of CT diagnosis of gastric cancer invasion depth, serosa invasion, lymph node metastasis accuracy were 79.4%, 85.3%, 71.9%. The accuracy of CT staging and pathological staging was 77.1%. Conclusion: The use of water as contrast agent in the stomach combined with local thin-slice bolus enhanced scanning method can significantly improve the accuracy of the diagnosis of serosal invasion by serosal carcinoma and lymph node metastasis in N2 group, which may provide valuable information for clinical treatment.