4[2]Wetting DJ,Brassat D,Droogan Aq,et al.The pathogenesis of L esions and normaln--appearing white matter changes in multiple sclerosis;a serial diffusion MRI study[J].Brain,2000,123:1667-1676.
5[3]Hasan KM,Gupta RK,Santos RM,et al.Diffusion tensor fraetitional anisotropy of the normal-appearing seven segments of the corpus callosum in healthy adults and relapsing-remitting multiple scleresis patients[J].Magn Reson lmag,2005,21:7343-7357.
6[7]Swanon JW.Multiple sclerosis:Upalate in diagnosis and review of prognostic faetors[J].J Mayo chin Proe,1989,64:577.