Table 1.

Image information of the healthy and craniotomy skulls.

Image Information	Healthy skull	Craniotomy skull
Patients’ age (min/median/average/max)	18/63/61/119	-
Percentage of female patients	40%	-
$x/y$ resolution	$512\times 512$	$512\times 512$
Number of axial slices (min/median/max)	-	147/167/291
Slice thickness	1.5 mm	0.5 mm