The publisher regrets that the following two figures from the article, “Localization to atherosclerotic plaque and biodistribution of biochemically derivatized superparamagnetic iron oxide nanoparticles (SPIONs) contrast particles for magnetic resonance imaging (MRI)” which appeared in Biomedical Microdevices 9:5, pp. 719–727, should have printed in color. Below are the figures printed in color.

Figures 3 and 5

Fig. 3
figure 1

Annexin V SPIONs are present in the plaque from the imaged regions of abdominal aorta. Histologic section abdominal aorta of the WHHLMI rabbit 1 (see Fig. 2) following imaging is shown. Image is a hematoxylin-eosin stain of a representative section of the region of contrast delivery (40X magnification). An adjacent section was stained for iron (Prussian blue, image b, 400X magnification). The cells staining with Prussian blue have morphologies characteristic of foamy macrophages. Image c shows TUNEL assay of cells from the same pocket of macrophages (apoptotic nuclei staining brown, indicated with black arrows, non apoptotic nuclei staining with methyl green). Image d shows Hoechst stain of the Prussian-blue staining macrophages with possible fragmented nuclei noted (white arrows)

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Fig. 5
figure 2

Most annexin V SPIONs distribute to locations other than the abdominal aorta. Annexin V on SPIONs was labeled with 99Tc and injected into a WHHL rabbit. Organs accumulating radiolabel are indicated

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