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目的：研究一种消除ＣＴ扫描时胃内气液面所产生伪影的药物及使用方法。材料及方法：实验室研究表明，以枸橼酸、碳酸氢钠为发泡剂，羧甲基纤维素钠为固泡剂，使气泡不断产生，且能较长时间浮于表面，从而形成由造影剂到气体逐渐递减的密度差，达到消除液平面的设想是可行的。随机抽查普通法（只服水３００～５００ｍｌ，或加少量泛影葡胺）ＣＴ检查１２０例作为对照组，试验组１２０人均服消伪药物。按胃内气液面消除情况评优差片。结果：对照组优片６７，差片５３，试验组优片１１８，差片２，二者有非常显著性差异（Ｐ＜０．０１）。结论：所研究消伪药物可从根本上消除ＣＴ扫描胃内气液面所产生的伪影。最后对药物密度，产泡最佳时间，服用方法等进行讨论。
OBJECTIVE: To study a drug that can eliminate artifacts caused by gas-liquid surface in the stomach during CT scanning and how to use it. MATERIALS AND METHODS: Laboratory studies have shown that citric acid, sodium bicarbonate as a foaming agent, sodium carboxymethyl cellulose as a foam stabilizer, the bubbles continue to produce, and can float a long time to the surface, resulting from the Contrast to the gas gradually decreasing density difference, to eliminate the idea of liquid level is feasible. A random sample of common law (only water 300 ~ 500ml, or a small amount of meglumopine) CT examination of 120 cases as a control group, the test group of 120 per capita service counterfeit drugs. According to the stomach to eliminate the situation of gas and liquid surface evaluation of poor film. Results: There were significant differences between the two groups in the control group, the best one 67, the poor one 53, the excellent one 118, the poor one 2 in the experimental group (P <0.01). Conclusion: The study of anti-counterfeiting drugs can fundamentally eliminate artifacts caused by CT scanning of the stomach gas-liquid surface. Finally, the drug density, the best time to foam, taking methods to discuss.