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Demonstration of photoacoustic lifetime oxygen monitoring in vivo. Ultrasound images (grayscale) overlaid with pseudocolored PALI images of various oxygen concentrations. Both the left and right images are from the mouse hind limb. The localized partial pressures of oxygen of a resting mouse inhaling either 10% (A) or 80% (B) oxygen, respectively. Scale bar = 5 mm. Adapted with permission from 76.
