人脑联合纤维的扩散张量纤维束成像初步研究-放射学实践.PDFVIP

2004 9 19 9 Radiol Pra ti e, Sept 2004, Vol 19, No. 9 23 ## 于春水, 李坤成, 李永忠, 梁志刚, 秦文, 刘嘉宾 = : 利用扩散张量纤维束成像显示人脑内 合纤维的三维结构, 探讨其与解剖学描述的一致性: 对 5 例正常志愿者进行单次激发回波平面扩散张量成像, 利用纤维束成像软件包显示人脑 合纤维的三维结构, 观察重建的 合纤维与解剖学描述的一致性: 通过选择恰当的兴趣区, 设置不同的分数各向异性阈值角度阈值步长和体素 长度内采样数目等参数, 扩散张量纤维束成像可以清楚地显示弓状纤维扣带钩束上纵束下纵束上枕额束和下枕额 束等 合纤维的三维结构, 除上枕额束以外, 其显示结果与解剖学描述具有良好的一致性: 合纤维束成像的结果 与解剖学描述具有高度一致性, 该方法是 一种可靠的研究人脑纤维连接的方法 = 磁共振成像; 合纤维; 脑; 解剖学 = R445. 2; R816. 1 = A = 1000-0313( 2004) 09-0623-04 Preliminary study of diffusion tensor tractography of the association fibers in the human brain YU Chun-shui, LI Kun- heng, LI Yong-zhong , et al. Department of Radiology, Xuan Wu Hospital, Capital University of Medi al S ien es, Beijing 100053, P. R. China = Abstract Objective:To visualize the three dimensional ar hite ture of asso iation fibers in the human brain by using diffusion tensor tra tography, and to investigate the oheren e of anatomi des riptions with those stru tures. Methods:Single shot e ho planar diffu- sion tensor imaging was performed in 5 volunteers, and then asso iation fibers in the human brain were visualized by using tra tography soft- ware pa kage. Finally , the oheren e of re onstru ted asso iation fibers with anatomi des riptions of those stru tures was evaluated. Re- sults: By sele ting appropriate regions of interest and setting different parameters whi h in luded fra tional anisotropy ( FA) threshold, angle threshold, step size and number of sampling in a voxel length, the three dimentional ar hite ture of asso iation fibers, in luding the ar uate fibers, the ingulum, the un inate fas i ulus, the superior and inferior longitudinal fas i uli, and the superior and inferior o ipito-frontal fas ulul i, an be learly v