Fig. 3.

(a) Absorption spectra (dashed line) of the dyes ICG and IRDye800CW in the NIR spectral range (550 to 950 nm) and the emission spectra (solid line) of both dyes at excitation of 660 nm in the NIR spectral range (750 to 950 nm). (b) Emission spectra of the dyes at excitation of 785 nm in the SWIR spectral range (1100 to 1600 nm). The inset shows emission in the 1250 to 1400 nm range.