Dataset from a simultaneous 89Zr and 124I PET acquisition performed with a 3D-printed mouse phantom with the preclinical PET/CT Inveon scanner. It includes: 1 ) Sinogram of Double Coincidences: With the same format as the Inveon scanner. It includes Prompt and Background . Background includes Randoms+Scatter+Promptgamma coincidences. It has already been corrected by attenuation and normalization. 2 ) Sinogram of Triple Coincidences: With the same format as the Inveon scanner. It includes Prompt and Background . Background includes Randoms+Scatter+Promptgamma coincidences. It has already been corrected by attenuation and normalization. 3 ) Triple Coincidences with V-LOR format (pairs of sinogram bins for each triple coincidence) 4 ) Mask with the gaps in the sinogram 5 ) PET and CT images reconstructed by the scanner 6 ) Separated reconstructed 124I and 89Zr images obtained with the mPET method.