Figure 3
From: High resolution imaging of intracellular oxygen concentration by phosphorescence lifetime

Phosphorescence lifetime (a), intensity (b) and luminescence intensity (c) images of a Colon26 spheroid. The upper panel shows corresponding images of the spheroid. Scale bars = 100 μm. The middle panel shows the line profile of (1) in the upper image and the lower panel shows the line profiles of (2).