Fig. 11.

(a) The mean fluorescence signals and standard deviations of the three sets of mice injected with ICG, ethanolamine-2-nitroimidazole-ICG, and piperazine-2-nitroimidazole-ICG in 25 μM concentrations. The mean signal strengths were 3.0 ($\pm 0.98$), 21.7 ($\pm 3.82$), and 37.7 ($\pm 2.22$), respectively. (b) The mean fluorescence signals and standard deviations of the three sets of mice injected with ICG, ethanolamine-2-nitroimidazole-ICG, and piperazine-2-nitroimidazole-ICG in 50 μM concentration. The mean fluorescence signals were 7.45 ($\pm 0.91$), 29.6 ($\pm 11.38$), and 48.6 ($\pm 1.55$), respectively.