Figure 2.

Spatial pattern of changes in BOLD signal standard deviation. A %ΔSTD map was created for each subject and cleaning approach using Equation 1 (see main text). The probability maps for each group and cleaning approach where then created by thresholding the single-subject maps to obtain the areas where %ΔSTD > 25%, registering the obtained maps to MNI standard space and calculating for each voxel the percentage of subjects with %ΔSTD > 25% separately for HC (left) and AD patients (right). Images are shown in radiological convention. (MNI coordinates x = 0, y = −18, z = 22).