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Representative in vivo ZTE MR images of 19F overlaid on those of 1H of a rat leg at day 0, 4 weeks and 8 weeks in axial and coronal directions. The presence of 19F is shown in false color. Yellow arrows indicate the implanted material, while the bright yellowish spot next to each leg corresponds to the reference (i.e., Eppendorf tube containing PFCE-loaded nanoparticles dispersed in water).
