904803.fig.002a
(a)
904803.fig.002b
(b)
904803.fig.002c
(c)
Figure 2: Skull used for prototype evaluation with attached base plate on the left cadaver site, reference structures on the outside of the skull (arrowhead), a target structure inside the scull (arrow), which was placed after opening the right parietal region of the head (a); on the CMM (b), and during the drilling process (c).