目的　 探讨注液摇篮CT扫描技术在胃癌检查中的应用及诊断价值。方法　 对 12 8例胃癌病人以水作对比剂 ,利用低张法摇篮技术 ,变换体位行CT检查 ,作出术前CT分期 ,并与手术病理分期对照。结果　CT分期与临床分期符合率 84 .4 % (10 8/ 12 8)。CT分期低估 11例 (8.6 % ) ,高估 9例 (7.0 % )。CT对肿大淋巴结的检出率 <1cm或≥ 1cm者分别为 2 3.1% ,76 .9% ,敏感性84 .8% (16 7/ 197) ,特异性 87.5 % (98/ 112 )。结论　 以水作对比剂的注液摇篮CT扫描技术能明显提高胃癌术前分期准确率 ,尤其在观察肿块与周围脏器结构关系及肿大淋巴结方面更具有优越性 Objective To investigate the application and diagnostic value of liquid injection cradle CT scan in gastric cancer. Methods 12 8 cases of gastric cancer patients with water as a contrast agent, the use of low-tension cradle technology, change position CT scan to make the preoperative CT staging and surgical pathology staging comparison. Results The coincidence rate of CT staging and clinical staging was 84.4% (10 8/128). CT staging underestimated 11 cases (8.6%), overestimated 9 cases (7.0%). The detection rate of CT in enlarged lymph nodes was 21.1%, 76.9%, 84.8%, 87.5% respectively (98/112). Conclusion CT scan with water as a contrast medium can significantly improve the accuracy of preoperative staging of gastric cancer, especially in observing the relationship between the tumor and the surrounding organs and the enlarged lymph nodes