Indocyanine green angiography of the right foot

Indocyanine green (ICG) angiography of the left foot. Figures A and B are taken 1 minute after the injection of the indocyanine green contrast. In figure A, the yellow, orange, and red areas correspond to increased uptake of the ICG contrast, which indicate that there is increased perfusion to these areas. In contrast, areas that are blue correspond to areas with lower uptake of the ICG contrast. Figure B shows the same image of the foot without the superimposed color map. The percentages correspond the amount of ICG detected at the region compared to an area of tissue with known normal perfusion.