Figure 1. A schematic of the process used to automatically identify and re-orient each individual subject.

(A) A structural image showing how the subjects were arranged in the scanner. (B) The four largest connected components are labelled as the individual subjects. (C) The center-of-gravity (CoG) of each subject is identified, and a line drawn between the CoG and the origin. This defines the approximate rotation angle required for re-orientation. (D) An individual subject after re-orientation and rigid registration to the atlas.