摘要:
目的:采用DTI观察胼胝体与联络纤维、投射纤维的毗邻关系.方法:收集69例健康志愿者行MRI扫描,颅内未见异常信号,后行DTI扫描,应用独立成分分析法分别筛选出不同纤维束成分,并分析差异,采用Extended MR Workspace工作站上的DTI Studio软件对所得DTI原始数据进行预处理,显示胼胝体及其邻近相关纤维束.结果:胼胝体在脑内连接广泛,尤其胼胝体压部,有前联合环路通过.结论:胼胝体位于纵裂底部,连接左右两侧大脑半球,是最大的横行神经纤维束,主要联系左右半球新皮质各部,其纤维联系额、顶、枕、颞叶,下面构成侧脑室顶,前部和后部进入额叶及枕叶,形成前钳、后钳,与脑内其他传导束有着密切联系.%Objective:To observe the relationship between the corpus callosum and the contact fibers or the projection fibers using DTI tractography. Methods:DTI tractography was performed on 69 healthy volunteers. The corpus callosum and its adja-cent fibre tracts were showed by the workstation processing. The relationship between callosum corpus and other fiber bundles and between the upper and lower pathway displayed by DTI. Results:The corpus callosum was widely connected with other area in the brain,especially,the anterior commissure looped through the splenium of corpus callosum. Conclusion:The corpus callosum as the brain's largest commissural fibers,is located at the bottom of longitudinal fissure,including the superior longitu-dinal fasciculus,superior occiptofrontal fasciculus,the anterior commissure,arched,inferior longitudinal fasciculus,inferior oc-ciptofrontal fasciculus,short bow fiber,long bow fiber,corticospinal tract,corticopontile tracts,corticocerebellar tracts,corticonuclear tract,central thalamic radiations and so on.