Fig. 1.

In the upper panels, mean cortical thickness of NAPLS2 healthy controls is plotted as a function of age before (upper left) and after (upper right) adjusting for the scanner offsets. The solid lines represent least-square linear fits and the colors correspond to different scanners used. In the lower panels, mean cortical thickness of human traveler subjects are plotted across selected scanners. (Lower left) Mean cortical thickness before adjusting for scanner offsets. (Lower right) Mean cortical thickness after adjusting for the offsets. Colors and shape correspond to human phantom ID and scan time points, respectively.