Fig. 2From: SMART (SiMulAtion and ReconsTruction) PET: an efficient PET simulation-reconstruction toolThe regions of interest used to a calculate the COV in the phantom background at slice 38 and b the intensity distributions of the standard deviation image at slices 53–57 (right). Both images are generated using the physical phantom data, but the regions of interest are equally extracted from the corresponding slices of the simulated dataBack to article page