MRI同层动态增强在垂体微腺瘤诊断中的应用价值

On the value of non dynamic enhanced MRI in the diagnosis of pituitary microadenoma

目的:观察脑垂体微腺瘤患者MRI动态增强扫描在垂体微腺瘤诊断中的价值。方法:选择垂体微腺瘤血PRL均>40ng/mL的患者23例。采用美国GE公司生产的SignaEXCITEHD1.5T超导型磁共振扫描仪,行垂体动态增强扫描时,用对比剂钆喷酸葡胺,其剂量为0.1mmol/kg,采用快速自旋回波序列。结果:常规平扫23例中,有15例可见异常信号改变,占66%;而动态增强扫描后有21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92%。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。

Objective： To observe the value of non dynamic enhanced MRI in the diagnosis of pituitary mieroadenoma. Methods： 23 pituitary microadenoma patients with PRL 〉 40 ng/mL were scanned with Signa EXCITE HD1.5T superconduction magnetic resonance imaging scanner manufactured by GE company in U. S. A. With 0.1 mmoL/kg magnevist solution as contrast agent, applied Turbo Spin Echo to employ non dynamic enhanced hanced MRI （92%） , with low signal area of microadenoma, forming evident image characters. These characters appeared even when one side of pituitary gland was full as plain scanning or when abnormal signals didnt show in T1, T2. Conclusion： Non dynamic enhanced MRI has obvious character, and plays a role in diagnosis of pituitary microadenoma in coronal position.