Table 1.

Results of patient specific phantom assessment

Assessment of phantom realism
	Nothing	Not Good	Good	Very Good	Perfect
Phantom general aspect (anatomical structures: proportions and locations)	0%	0%	24%	47%	29%
Haptic response	0%	0%	18%	59%	24%
Size of the brain internal structures	0%	0%	18%	53%	29%
Brain tissue appearance	0%	0%	18%	53%	29%
Relationship between internal anatomical structures used as reference for access	0%	0%	24%	35%	41%
Realism average	0%	0%	20%	49%	31%
Assessment of phantom educational potential (utility)
	Nothing	Not Good	Good	Very Good	Perfect
To acquire basic skills necessary for surgery	0%	0%	6%	65%	29%
To acquire depth sensation (insertion / extraction) through the bony window	0%	6%	6%	59%	29%
To learn how to orient yourself during the surgical procedure	0%	0%	6%	59%	35%
To learn procedures	0%	0%	6%	65%	29%
To learn how to position drains and other equipment	0%	0%	6%	59%	35%
Utility Average	0%	1%	6%	61%	32%
Overall Average	0%	1%	13%	55%	31%