Average relative mean difference (%) of a) cortical thickness, b) subcortical volumes and c) VBM measurements comparing Center1 images before and after the upgrade. Error bars show the standard deviation of the relative mean difference. The average relative mean differences of the within Center1 measurements were also added for the comparison purposes.
Chalavi et al. BMC Medical Imaging 2012 12:27 doi:10.1186/1471-2342-12-27