Reciever operating characteristic analysis of minimum values (averaged between the two readers).

The test was positive for recurrence if the variable results were less than or equal to the cut-off value. Axial diffusivity was found to have superior diagnostic value (sensitivity, specificity, area under the curve and positive predictive values) to detect the recurrence compared to mean and radial diffusivity. Positive predictive values of ADmin/MDmin/RDmin for the given cut-offs were 81.0%/60.7%/73.9%.