PET imaging of LS174-T xenografts in athymic mice with 64Cu-labeled DOTA-NH-PEGn-AVP04-50. Red=blood; green=liver; yellow=kidney; turquoise=tumor. Pow A shows the PEG0 construct. Row B is the PEG12 construct. Row C is the PEG24 construct. Row D is the PEG48 construct.
