中文摘要：

目的探讨MRI动态增强扫描在垂体微腺瘤诊断中的价值。方法经临床及实验室检查拟诊为垂体微腺瘤的21例患者均行MRI平扫、动态增强扫描及常规延迟增强扫描，统计垂体微腺瘤在MRI平扫、动态增强扫描及常规延迟增强扫描中的检出率。结果MRI平扫、动态增强扫描、延迟增强扫描对病灶的检出率分别为42．9％（9例）、95．2％（20例）、71．4％（15例）。结论MRI动态增强扫描可明显提高垂体微腺瘤的检出率，应作为诊断垂体微腺瘤的首选检查方法。

英文摘要：

Objective To evaluate the value of dynamic contrast enhanced MRI in the diagnosis of pituitary microad-enoma.Methods 21 cases with pituitary microadenoma confirmed by clinical manifestation and biochemical tests all underwent plain MRI, dynamic enhanced MRI and conventional delayed enhanced MRI.Then, detection rates of pituita-ry mieroadenoma in plain MRI,dynamic enhanced MRI and conventional delayed enhanced MRI were counted.Results The detection rates of pituitary microadenoma of plain MRI, dynamic enhanced MRI and conventional delayed en-hanced MRI were 42.9%（9cases）,95.2%（20cases） and 71.4%（15cases）,respectively.Conclusion Dynamic enhanced MRI can significantly improve the detection rate of pituitary microadenoma.Thus,it should be considered as the first choice to diagnose pituitary microadenoma.