Figure 1

(a) Coronal PET/CT image of animal 1. The centre of the red cross shows the position of the nanoparticle-accumulated sentinel lymph node. Nanoparticle accumulation is also seen in two iliac lymph nodes. The lead cylinder shielding the injected paw is shown to the bottom right. (b) MMUS image of the same sentinel lymph node. The image is a magnification of the area outlined with a white rectangle in the PET/CT image. The induced magnetomotive displacement is colour-coded in the image according to the colour-bar to the right.