Figure 4: 2D-fluorescence images of subcutaneous (left panel) and orthotopic (right panel) tumor-bearing mice 24 hours after LNC intravenous injection (10 nmol of dye).

(A) Images were acquired over a period of 100 ms and are presented in the same grayscale (1,700–30,000). The arrows indicate the tumors. (B) Corresponding tumor/skin ratios 24 hours after LNC injection. Note that tumor/skin ratio was not accessible for orthotopic U87MG brain tumors.