Fig. 2From: Diagnostic performance of a high-spatial-resolution voxelwise analysis of neuromelanin-sensitive imaging in early-stage idiopathic Parkinson’s diseasePairwise comparison of receiver operating characteristic curves N1, the region of interest in nigrosome 1; N2, the region of interest in nigrosome 2; N1 + N2, volume-weighted mean of N1 and N2Back to article page