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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: Colloids Surf B Biointerfaces. 2014 May 12;119:106–114. doi: 10.1016/j.colsurfb.2014.04.027

Figure 1.

Figure 1

(A) MRI slice of deionized water and SPIONs coated with various PEG MWs in deionized water at 100 ppm Fe and 500 ppm Fe. Black lines added as a visual aid. (B) 1/T2 relaxation rate of SPIONs as a function of iron concentration. (C) R2 relaxivity in s−1ppm−1 for various PEG MW of SPION coating.