Water-soluble Au-Fe3O4 heterostructured nanoparticles with high biocompatibility were synthesized and applied as a dual modality contrast agent. These nanoparticles present strong CT/MRI contrast enhancement in a rabbit model. Low concentrations of Au-Fe3O4 were found to obtain a similar effect to high concentrations of a commercial iodine agent in the CT image.
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Zhu et al. (2013) studied this question.
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