Improvement in Tracing Quantum Dot-Conjugated Nanospheres for In Vivo Imaging by Eliminating Food Autofluorescence

Figure 6

In vivo images before and after intravenous injection of QD-MNS in a nude mouse being fed the purified diet (D10001a). There is no autofluorescence in the mouse fed the purified diet with the presence of fluorescent marker (a). It is clear that the black intense fluorescence signals indicate QD-MNS accumulation in the abdominal region 30 min after injection (b) (excitation filter: 720 nm, emission filter: 790 nm).

(a) Before i.v. injection

(b) 30 min after i.v. injection