Fig. 5.

Changes in cerebral vessel diameter and the centerline velocity during the photothrombosis process at different locations. (a) Illustration of the definition of vessel diameter D and centerline velocity $V_C$ on BVP. (b) Vessel diameter changes at cross sections C1 and C2, denoted as $D_{C1}$ and $D_{C2}$. (c) The centerline velocity, i.e. $V_{C1}$ and $V_{C2}$, on cross sections C1 and C2.