FANCB and neoplasm: This study further showed that radioactivity in the blood in non-tumour bearing Balb/c mice was much lower at 18 h p.i. of [64Cu]Cu-NOTA-panitumumab F(ab')2 and Fab than for the intact IgG, but kidney uptake was much higher for Fab than F(ab')2, thus F(ab')2 are preferred for PET and RIT.