The early MRI features of subacute virus encephalitis

Objective To investigate subacute virus encephalitis early MRI features so as to improve the diagnostic level of the disease.Methods To retrospectively analyze 17 cases clinical final diagnosis subacute virus encephalitis early MRI features.Results 16 of all 17 cases brain MRI had abnormal appearance,in which 15 cases had multi-focus,1 case had single focus.The MRI finding:(1)affection disposition:brain mantle involved,2 cases located in brain mantle,14 cases located in brain mantle and subcortical white,3 cases located in centrum ovale.(2)Affection form:6 cases had gyrus-like or spot film abnormal signal in swelling substantia corticalis,9 cases had abnormal patching signal in both brain mantle and subcortical white,2 cases had beading lacuna focus in centrum ovale,1 case had largely lamellar abnormal signal in both brain mantle and subcortical white.(3)Affection signal:DWI showed high signal,T2WI and FLAIR sequence showed light high or high signal,T1WI showed equal or low signal.(4)Enhancement scanning:6 cases enhancement scanning had no abnormal enhancement.Conclusions Subacute virus encephalitis early MRI features had some characteristic,and final diagnosis was based on affection disposition,form,signal and clinical manifestation.