The MIP PET image of the reference GLP-1 receptor imaging agent [Nle14,Lys40(Ahx-DOTA-68Ga)NH2]Ex-4 at 1 h p.i (Fig 5B) demonstrates a typical biodistribution profile for the radiometal labelled Ex-4 analogue with a high tumor uptake but also very high uptake in the kidney. Here, GLP1R is linked to neoplasm.