Abstract： Objective,To evaluate the value of magnetic resonance imaging(MRI) in clinical diagnosis of tuberculous meningitis.Methods,Forty-six patients (29 men,17 women,age ranged 11-72,mean age 41.5) with tuberculous meningitis were examined with MRI.The MRI findings of tuberculous meningitis were analyzed retrospectively.Results,On pre-contrast T1WI and T2WI,meningeal lesions in the basal cistern region were detected in twenty cases.Abnormal meningeal thickening and enhancement were found in 38 patients.Meningeal and cerebral miliary tuberculous foci were demonstrated in 21 cases.Ependymal involvement was found in six patients and cranial nerves were affected in other two patients.No abnormal meningeal enhancement was detected in eight mild cases.On the follow-up images in nine patients,the abnormal findings alleviated in varied degree or,remained unchanged.Conclusion,The pathological changes in tuberculous meningitis could be demonstrated effectively by specific findings on MRI.MRI,especially the post-contrast MRI,proved a reliable modality in clinical diagnosis and assessment of tuberculous meningitis.