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目的：探讨常规ＣＴ在胃肠道肿瘤诊断中的价值和检查方法。材料和方法：作者回顾性分析４０例经ＣＴ检查手术病理证实的胃肠道肿瘤资料，使用日立Ｗ－５５０Ｅ，ＣＴ检查采用服水低张技术和改良式团注增强方法。结果：４０个病例，ＣＴ发现３６个病灶，其中胃腺癌２４例，平滑肌瘤７例。平滑肌肉瘤４例，胃神经鞘瘤１例，检出率９０％，定性总准确性８５％。初步结果表明，对平滑肌类肿瘤，ＣＴ检出率达１００％，定性准确性达８１８１％。结论：采用合适的胃检查技术可充分发挥常规ＣＴ在胃肿瘤检查中的作用，弥补部分ＣＴ机扫描速度慢，胃肠道图像质量差的缺陷。
Objective: To investigate the value and examination of routine CT in the diagnosis of gastrointestinal tumors. Materials and Methods: The authors retrospectively analyzed 40 cases of gastrointestinal tumors confirmed by CT examination of pathology, using Hitachi W-550E, CT examination using hypotonic technique and modified bolus enhancement method. Results: In 40 cases, 36 lesions were found by CT, including 24 cases of gastric adenocarcinoma and 7 cases of leiomyoma. 4 cases of leiomyosarcoma, gastric schwannoma in 1 case, the detection rate was 90%, the overall qualitative accuracy of 85%. The preliminary results showed that for the smooth muscle tumors, the detection rate of CT was 100% and the qualitative accuracy was 8181%. Conclusion: The appropriate technique of gastric examination can give full play to the role of routine CT in gastric tumor examination, and make up for the shortcomings of some CT machines such as slow scanning speed and poor gastrointestinal tract image quality.