目的 探讨口服红茶前后降低胃 肠道液体对磁共振胰胆管成像(MRCP)干扰 的应用价值。方法 对46例患者口服红茶 前后的MRCP图像质量进行自身对照研究。 结果 服用红茶后MRCP的图像质量有明显 提高，差异有统计学意义(P＜0.001)。口 服红茶后，可有效抑制胃、十二指肠肠道 内的液体高信号。结论 红茶作为一种口 服阴性对比剂，可有效消除胃肠道液体信 号，应用于MRCP成像检查中可以显著提高 图像质量。

Objective To evaluate the value of magnetic resonance cholangiopancreatography (MRCP) before and after orally taking Black tea. Methods We had a self-control study for the quality of MRCP images before and after 46 patients taking orally black tea. Results After taking Black tea, MRCP image quality significantly improved，the difference was statistically significant (P<0.001). After taking black tea, it can effectively restrain the stomach, duodenum intestinal liquid high signal. Conclusion Black tea is a kind of oral negative contrast agent, which can effectively eliminate the gastrointestinal fluid signal. It can significantly improve the image quality by applying black tea on MRCP