Fig. 3.

sO₂ distributions or ‘oxymaps’ of one tumour, at 5, 15, 30, 45, 60 and 75 min after placing the animal in the tank. The ‘oxymaps’ are shown as overlays on greyscale photoacoustic images, of the central slice of each tumour. B: body; W: water. Yellow bar represents a 10 mm size scale.