Table 1. Offsets (mean ± s.d., in mm) between the coordinates of the cranial landmarks bregma and lambda as obtained from pre-operative CT and from the co-registered MRH template.

	AP	ML	DV	ED
Bregma (B)	−0.41 ± 0.42**	−0.12 ± 0.15*	−0.17 ± 0.14***	0.62 ± 0.18
Lambda (L)	−0.43 ± 0.33***	0.07 ± 0.13	−0.33 ± 0.19***	0.62 ± 0.25

AP anterior-posterior, ML medial-lateral, DV dorsal-ventral, ED Euclidean distance. ***p < 0.001; **p < 0.005; *p < 0.05.