
10 µm
(a)
(b)
1 µm
FIGURE 32.12 Sensitivity and multicolor capability of QD imaging in live animals. (a) Comparison between QD-tagged (right ank) and GFP-
transfected cancer cells (le ank) shows the diculty of detecting implanted GFP-expressing cancer cells in vivo while QD-tagged cells are easily
observed. (b) Simultaneous in vivo imaging of multicolor QD-encoded microbeads demonstrates the ability to image multiple colors of quantum
dots simultaneously. (From Gao, X. et al., Nat. Biotechnol., 22, 969, 2004. With permission.)
1 cm
N
Autofluorescence
post-injection
post-injection
resection
NIR fluorescence Color/NIR ...