Figure 2.

The ROC analysis to assess the efficacy of DTI/ASL variables for discriminating PD patients from healthy subjects (A), and discriminating Early PD patients from healthy subjects (B). The discriminative efficacy of FA and CBF values of the substantia nigra (a), caudate nucleus (b), globus pallidus (c), putamen (d), hippocampus (e), prefrontal cortex (f), and subcortical white matter regions (g–j), as well as the FN passing through the substantia nigra (k), were assessed in (A) for distinguishing PD (including early PD and mid-late PD) patients from healthy subjects, and in (B) for distinguishing early PD patients from healthy subjects.