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. Author manuscript; available in PMC: 2016 Jun 1.
Published in final edited form as: Biomaterials. 2015 Feb 28;52:251–261. doi: 10.1016/j.biomaterials.2015.02.040

Fig. 4.

Fig. 4

Tri-modal imaging of the blood samples drawn after injection of NIRF labeled NPs functionalized with NH2-PEG-NH2 and NH2-PEG-FMOC: (a) MPI, (b) MRI R2 map and (c) NIRF images. No signal was observed in blood samples without any NPs. The signal intensity in all the three imaging modalities depends on the concentration and pharmacokinetic of the NPs in the blood plasma. NPs coated with NH2-PEG-FMOC showed stronger post-injection signals in the blood in all these three imaging modalities.