Figure 8.

In vivo two-photon imaging of vasculature labeled by a tail vein injection of water-soluble QDs (fluorescence wavelength, 550 nm; TEM diameter, 4.3 nm, excitation 780 nm). This image shows a projection of capillary structure through 250 μm of adipose tissue (50 images, 5 μm per step). The scale bar represents 50 μm. (Figure reproduced with permission from D. R. Larson et al. Science 2004;300:1434.)