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*For Correspondence Abstract Magnetic Resonance Imaging (MRI) is a widely accessible imaging technique for the detection of brain tumours and cancer, which are further con!rmed by histopathological examination. Accurate detection of the tumours and its extent is very di"cult. #e present study attempted to evaluate the convenience of MRI in detection of di$erent grades of astrocytomas, which are the most commonly occurring brain tumours. #is cross-sectional study was conducted at the Department of Radiology and Imaging with the collaboration of Department of Neurosurgery and Department of Pathology at Sir Salimullah Medical College (SSMC & MH), Dhaka from January 2013 to December 2013 for a period of one year. #e study population was all the diagnosed cases of intracranial astrocytoma patients regardless of their age and sex. #e studied included 48 brain tumour (astrocytoma) patients, ages between 13 and 69 years old. All cases having no contraindication for MRI underwent MR examination followed by histopathological examination of the postoperative resected tissues. #e !ndings of the MRI and histopathological examination were compared to !nd out the test validity of the MRI !ndings of the di$erent grades of astrocytoma’s. #e highest sensitivity was found in grade III astrocytoma (90.5%) followed by grade II (85.7%) grade IV (75.0%) and grade I (60.0%). #e highest speci!city Diagnostic Accuracy and Validity of Magnetic Resonance Imaging in the Detection of Speci!c Type of Brain Tumour *Munshi S, Ahmed F, Halder B, Yousuf A, Rahman MM, Sarker S