Quantitative comparison of cranial approaches in the anatomy laboratory: A neuronavigation based research method

Table 1 Results of the phantom quantification with 4 different research methods (see text for further details)

		e-FilmTM		Microscribe 3DX Digitizer®		Storz® navigator + Maya® reconstructions		ApproachViewer - GTx-UHN
		mean	SD	mean	SD	mean	SD	Mean	SD
Height (mm)	Large MS	67	0.67	67.8	0.79	66.36	0.29	69.19	0.26
	Medium	48.3	0.48	52.5	0.23	47.51	0.31	48.7	0.55
	Small	38.3	0.67	40.46	1.11	36.98	0.56	38.9	1.03
Area (mm2)	Large - deep	5310.19	43.50	4877.78	52.82	5461.03	35.56	6003.2	49.42
	Large - deep mid	1805.37	19.64	1548.06	15.45	1836.83	32.66	2073.4	40.85
	Large - superficial	441.87	21.22	416.81	12.11	409.05	12.62	533.3	16.44
	Medium - deep	NA	NA	128.24	5.45	136.89	4.73	201.4	7.41
	Medium - middle	NA	NA	498.69	14.01	NA	NA	470.4	21.80
	Medium - superficial	2425.57	46.34	2375.56	35.35	2555	20.86	2955.7	58.89
	Small - deep	82.49	6.37	108.34	4.92	90	4.24	125.4	6.88
	Small - superficial	150.84	12.70	161.43	5.54	168.3	11.36	256.1	11.40

Area values are expressed in mm²; height values are in mm. SD: Standard deviation; Mid: Area included in the deep surface (mid-area); NA: Not available.