Figure 2.

Quantitative results for the detection of malignant gliomas across 30 target subjects. The positive and negative predictive values for varying declaration thresholds can be seen in (a) and (b), respectively. The “declaration threshold” indicates the threshold probability for which we declare a voxel to be anomalous (in this case, a cancerous voxel). Finally, the per-subject ROC curves can be seen in (c) in the various thin lines, with the mean ROC curve across the subjects represented with the thick black line.