Figure 5. Magnetic resonance targeting of macrophages into primary prostate tumors.

A. Schematic of targeted regions using imaging gradients for magnetic resonance targeting (MRT). B. Histological staining of paraffin wax-embedded tumor sections with an anti-human CD68 antibody and Prussian blue (CD68-positive macrophages are brown and SPIO-positive macrophages are blue: see arrows) C. Representative RARE images from five mice per group and R2 maps for each group. (Reproduced with permission from [7], © 2015 Macmillan Publishers Limited.)