Fig. 4.

(a) Illustration of partial craniotomy model. The regions enclosed by the closed loops (regions 1,3 & 5) are located in the craniotomy. Regions outside of the closed loops (regions 2,4 & 6) are located in the thinned (but intact) skull. (b) Time integrated speckle variance curves illustrating the influence of static scattering due to the presence of the thinned skull. A decrease in the value of ρ indicates an increase in the amount of static scattering. Regions 2 and 4 show distinct offset at large exposure durations. This offset it due to increased ν_s over the thinned skull