MRI识别正常下丘脑部分神经核团  

MRI in identification of the nucleus in normal hypothalamus

作　　者：朱友志[1] 张禹[1] 莫子[1] 骆祥伟[1] 张锐[2] 邓雪飞[2] 

机构地区：[1]中国人民解放军第105医院影像科,安徽合肥230031 [2]安徽医科大学人体解剖学教研室,安徽合肥230032

出　　处：《中国医学影像技术》2013年第8期1263-1266,共4页Chinese Journal of Medical Imaging Technology

基　　金：国家自然科学基金青年基金项目(81200895)

摘　　要：目的采用MRI识别正常成人下丘脑神经核团。方法对20名成年健康志愿者行冠状位T1W和T2W扫描;将3个成人头颅标本制成冠状面断层标本,辨认下丘脑神经核团;对比观察下丘脑神经核团解剖学和影像学特征。结果断层标本中,根据下丘脑白质如前连合、穹窿、视束和乳头丘脑束,可辨认主要神经核团。MRI中,与正常脑皮质相比,上述白质T1WI呈稍高信号、T2WI呈稍低信号;根据前连合和3脑室可定位视前核,T1WI呈稍高信号、T2WI呈稍低信号;根据前连合和视束可定位视上核,T1WI呈等信号、T2WI呈稍高信号;根据3脑室和穹窿可定位室旁核、漏斗核,T1WI呈等信号、T2WI呈稍高信号;根据乳头丘脑束可辨认乳头体核,T1WI呈等信号、T2WI呈稍低信号。结论以白质和脑室为定位标志,MRI可清晰显示各具特征的下丘脑主要神经核团。Objective To identify the nucleus in hypothalamus with MRI in healthy adults. Methods Twenty healthy adult volunteers underwent coronal MRI with conventional T1W and T2W sequence. Coronal sectional specimens of three human adult heads were made to identify the nucleus in hypothalamus. The anatomy and imaging features of the nucleuses were observed contrastively. Results In the sectional specimens, most of the nucleuses in hypothalamus were identified with whiter matter as reference, such as the anterior commissure, fornix, optic tract and mammilothalamic tract. Compared with the signal of the cortex, the above whither matter structures showed slight high T1 signal and slight low T2 signal in MRI. The preoptic nucleus was identified according to the relative position of anterior commissure and third ventricle, with slight high T1 signal and slight low T2 signal, whereas the supraoptic nucleus was identified according to the relative position of anterior commissure and optic tract, with equal T1 signal and slight high T2 signal. The paraventricular nucleus and infundibular nucleus were identified according to the relative position of fornix and third ventricle, with equal T1 signal and slight high T2 signal. The mamillary nucleus was identified according to the relative position of mammilothalamic tract, with equal T1 and slight low T2 signal. Conclusion The main nucleuses in hypothalamus show different features in MRI, which can be identified by MRI with white matter and ventricles as the location sign.

关 键 词：下丘脑 神经核 磁共振成像 解剖学和组织学 

分 类 号：R322.8[医药卫生—人体解剖和组织胚胎学] R445.2[医药卫生—基础医学]