Table 2. Percentage of Excitation Photons for Various Final Destinations.

	920 nm	1320 nm	1280 nm
Contributing to heating	20	63	49
Back scattered to window	25	9	10
Back scattered to skull	20	9	11
Escaped*	35	19	30

^*Photons escape the simulation volume by traveling too far (>6 mm) from the center of the cranial window or too deep (>6 mm) from the tissue surface.