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. Author manuscript; available in PMC: 2010 May 7.
Published in final edited form as: Opt Express. 2009 Dec 7;17(25):22341–22350. doi: 10.1364/OE.17.022341

Fig. 2.

Fig. 2

(a) Color-coded angiogram of pial microvasculature from an exposed cranial window. Arterioles are indicated in red, and venules are blue. Measured pO2 values (mmHg) at selected intravascular locations are indicated in green. (b) Phosphorescence decay profiles measured at points identified with white boxes in Fig. 2(a). Higher O2 concentration in the arteriole causes more quenching of phosphorescence signal, and consequently a faster decay (red profile).