Fig. 4From: Theranostic SPECT reconstruction for improved resolution: application to radionuclide therapy dosimetryLeft: Maximum intensity projection (MIP) of 4-h 64Cu-PET head with VOIs labelled. Upper row centre: 64Cu-PET image (OSEM + RM + 5 mm Gaussian filter): transverse slice showing L1, L3 and L4. The same transverse slice, 67Cu-SPECT; top right: qSPECT OSEM (4 iterations and 8 subsets), lower row centre: OSEM + RM (40 iterations and 12 subsets), bottom right: SPECTRE with resolution modelling. Abbreviations: L–lesion; P–parotidsBack to article page