Fig. 4.

Ex vivo imaging of freshly harvested axillary and thoracic lymph nodes following subcutaneous administration of QDs at 30 pmol/g, at 4 h, 48 h and 5 days post-injection. The axillary lymph node (ALN) and thoracic lymph node (TLN) were illuminated with a 455 nm LED lamp for 0.1 s and images were obtained using a CCD camera. A: 4 h post-injection; B: 48 h post-injection; C: 5 days post-injection. False colour bar scale with blue corresponding to lower intensity.