Fig. 3
From: Photoacoustic imaging of tumour vascular permeability with indocyanine green in a mouse model
In vitro photoacoustic imaging of ICG. a Representative images showing a map of optical absorption from ICG in cotton swabs soaked with the indicated concentrations of ICG (0, 1, 2.5 and 5 mg/ml). Brighter signals in the photoacoustic imaging map corresponded to higher optical absorption of ICG chromophores. The colour map has red graduation that fades into blue (n = 4). b Graph showing the linear relationship between the mean peak photoacoustic signal (mean ± SD) and ICG dose. The regression line shows a significant correlation with an r2 value of 0.970 (n = 4)