Figure 2.

Raw transillumination images of mouse tumors at the intrinsic (first raw) and the fluorescence wavelengths (second row), and the normalized fluorescence image (third raw). (a) and (b) Lung tumor at different projections (110 and at 270 deg). (c) and (d) Brain tumor at different projections (340 and 150 deg). Arrows show intensity “hot spots” due to light waveguiding at the edges of the body. Dotted lines describe the outline of the mouse head, and the rectangle is the region of interest.