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A radioconjugate composed of 5G, an agent targeting an as of yet undisclosed target, conjugated, via the bifunctional, macrocyclic chelating agent 1,4,7,10-tetra-azacyclododecane-1,4,7,10-tetra-acetic acid (DOTA), to the radioisotope gallium Ga 68, with potential use as a tracer for certain tumors during positron emission tomography (PET). Upon administration of the gallium Ga 68-DOTA-5G, the 5G moiety targets and binds to a specific target on tumor cells. Upon binding, the tumor cells can be detected during PET imaging.
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