MRI动态增强扫描在垂体微腺瘤诊断中的价值

JOURNAL OF CHINA CLINIC MEDICAL IMAGING（2003）

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Abstract

目的:观察25例脑垂体微腺瘤患者MRI动态增强扫描在垂体微腺瘤诊断中的价值.方法:25例垂体微腺瘤患者血PRL均＞40ng/ml.采用德国Siemens Impact 1.0T超导型磁共振扫描仪,行垂体动态增强扫描时,用对比剂Gd-DT-PA(马根维显),其剂量为0.1mmol/kg,采用快速自旋回波序列.结果:常规平扫25例中有15例可见异常信号改变,占60%,而动态增强扫描后22例可见正常垂体腺、漏斗、海绵窦逐一明显强化,微腺瘤则尚未强化仍呈低信号区,形成鲜明对比的图像特征,占88%.平扫垂体一侧饱满或T1、T2未见异常信号者并不干扰此特征的出现.结论:MRI动态增强扫描具有特征性征象,在冠状位上对垂体微腺瘤最具有诊断意义.

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