Correlation between white matter microstructural lesions by diffusion tensor imaging and clinical profiles in patients with temporal lobe epilepsy and hippocampal sclerosis / 实用放射学杂志

ABSTRACT

Objective Diffusion tensor imaging(DTI)was used to explore the characteristics of white matter (WM)microstruc-ture lesion in patients with temporal lobe epilepsy(TLE)and hippocampal sclerosis(HS).Then we investigated the influence of the age of epilepsy onset and the course on WM changes.Methods DTI data were obtained in 30 TLE patients with HS and 23 age and sex-matched healthy controls.Thirteen patients had left HS (LHS)and seventeen had right HS (RHS).Between-group compari-sons of fractional anisotropy (FA)were carried out by using track-based spatial statistics (TBSS).In addition,FA in regions of in-terest (ROI)where white matter lesions had statistically significant difference was correlated with the age of onset and the course. Results Subjects in the LHS group,as compared to healthy controls,demonstrated these clusters of reduced FAbilateral corona radiata,the left genu of corpus callosum,the right body and splenium of corpus callosum,the right posterior thalamic radiation,ex-ternal capsule and superior longitudinal fasciculus.White the subjects in the RHS group,the clusters of reduced FA are involving bi-lateral corpus callosum,corona radiata,posterior thalamic radiation,cingulum,superior longitudinal fasciculus,and the right ante-rior limb of internal capsule,the right retrolenticular part of internal capsule and external capsule.In LHS group,the FA of the left genu of corpus callosum was negatively correlated with the course,and the FA of the right anterior corona radiata was positively cor-related with the age of onset.In RHS group,the FA of the bilateral superior corona radiata was positively correlated with the course.Conclusion DTI detects extensive changes in TLE with HS that are not confined to temporal lobe.The age of epilepsy onset in LHS was correlated with the changes of anterior corona radiata,while the course and the WM change were not definitely linked to each other.