The application and accuracy of feature matching on automated cephalometric superimposition

BMC Medical Imaging

Table 1 Mean operative differences in T₂ landmark distance (mm) between operators. Paired t-test results for the accuracy between hand and automated superimposition, both compared with true values in cranial base superimposition

	N	Operative difference (Hand process) (mm)		N	Accuracy (Hand process) (mm)		Accuracy (Automated process) (mm)		P-value
	N	Mean	SD	N	Mean	SD	Mean	SD	P-value
Pt	84^a	0.61	0.63	28	0.33	0.28	0.41	0.37	0.128
PNS	84	0.69	0.65	28	0.40	0.32	0.47	0.39	0.290
ANS	84	0.82	0.76	28	0.47	0.38	0.54	0.45	0.313
A	84	0.85	0.86	28	0.50	0.42	0.59	0.54	0.274
B	84	0.99	0.94	28	0.58	0.46	0.59	0.48	0.880
Me	84	1.02	0.96	28	0.55	0.51	0.64	0.58	0.366
Go	84	0.91	0.88	28	0.52	0.43	0.48	0.50	0.626
Co	84	0.67	0.68	28	0.39	0.34	0.44	0.35	0.254

^aBecause three operators were compared, a total 28 pairs of cephalograms could yield 84 measurement values

ISSN: 1471-2342