Kwee RM, et al. - By a systematic review and meta-analytical study, researchers sought to discover the dynamic susceptibility contrast (DSC) MR perfusion accuracy for diagnosing recurrent brain metastases, the most common malignant intracranial neoplasms in adults, post radiotherapy. Quality assessment was performed on ten incorporated studies, including a total of more than 271 metastases. In diagnosing recurrent brain metastases post radiotherapy, DSC MR perfusion was suggested to be highly accurate. Still, because of methodological quality concerns and heterogeneity between studies, these findings should be evaluated cautiously.