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ROC curve for different metrics of the solid tumoral part. The selection of 1.42 as a cutoff value of MD of the solid tumoral part was used to differentiate low-grade from high-grade gliomas; the best results were obtained with AUC of 0.957, accuracy of 91.4%, sensitivity of 94.7% and specificity of 87.5%. ROC: receiver operating characteristic; MD: mean diffusivity; AUC: area under the curve.
