The functionality of this module is based on the N30R83 maximum probability atlas of brain structures [3,4], which was officially licensed from the Imperial College in London, UK. Given brain PET and/or MR images, it allows the user to calculate objective brain structure outlines in a guided step-by-step fashion. These definitions can then be applied to PET images for calculating regional statistics or Time-Activity Curves (TAC), which may optionally be corrected for the partial-volume effect.