| 摘要 |
Compounds useful for high resolution diagnostic imaging incorporate an imaging agent having a chelator that is linked by a metal-cleavable bond to a ligand that has affinity for a site removed from the site of diagnostic interest. Upon labelling, the ligand is cleaved leaving the labelled imaging agent free to localize at the site of diagnostic interest unhindered, while the ligand and any unlabelled imaging agent is sequestered to the removed site. By sequestering unlabelled imaging agent, the labelled imaging agent does not compete to occupy the site of interest, resulting in images of enhanced resolution.
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