Old technique, new application: A simple and efficient chelator-free strategy for the synthesis of a novel dual-modality PET/MRI agent has been developed. Labeling of radioarsenic (*AsIII and *AsV, *=71, 72, 74, 76) at the surface of superparamagnetic iron oxide nanoparticles (SPIONs) resulted in *As-SPIONs that can be used for simultaneous PET/MRI in cancer diagnosis, lymph-node mapping, and potentially for internal radiotherapy.
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Chen et al. (2013) studied this question.
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