Fig. 6
ROC analysis between patients in the PML and GBM groups. ROC analyses demonstrated mean MTRasym to have high discriminatory power for differentiating between patients in the PML and GBM groups. When an AUC value of < 0.015 was used as the threshold for diagnosis, the sensitivity, specificity, positive predictive value, and negative predictive value were 90.9%, 100%, 100%, and 96.8%, respectively. ROC receiver operating characteristics, PML progressive multifocal leukoencephalopathy, GBM glioblastoma multiforme, MTR magnetization transfer ratio, AUC area under the curve