Table 1.

Average, median, and SD of the Euclidean distance between landmark coordinates for the algorithm accuracy and interobserver variation

Measurement error (mm)	Algorithm versus observer I		Algorithm versus observer II		Interobserver variation
	Mean ± SD	Median	Mean ± SD	Median	Mean ± SD	Median
Right coronary ostium	2.37 ± 1.44	2.22	2.02 ± 1.34	1.65	2.38 ± 1.56	2.01
Left coronary ostium	1.99 ± 1.30	1.88	3.25 ± 4.57	1.95	3.21 ± 4.89	1.61
Right coronary hinge point	3.03 ± 1.48	2.52	3.45 ± 1.89	2.95	2.24 ± 1.26	1.95
Non coronary hinge point	2.84 ± 1.93	2.44	2.86 ± 1.57	2.56	2.96 ± 1.53	2.58
Left coronary hinge point	3.06 ± 1.72	2.84	3.21 ± 1.50	3.36	2.53 ± 1.22	2.28
Overall error	2.66 ± 1.63	2.35	2.96 ± 2.52	2.46	2.67 ± 2.52	2.23
Stenotic patients	2.66 ± 1.60	2.31	3.02 ± 2.68	2.62	2.69 ± 2.73	2.25
Non-stenotic patients	2.66 ± 1.73	2.35	2.76 ± 1.97	2.26	2.60 ± 1.77	2.23
End diastole image volumes	2.57 ± 1.58	2.23	2.75 ± 1.82	2.42	2.48 ± 1.62	2.14
End systole image volumes	2.94 ± 1.76	2.60	3.65 ± 4.05	2.62	3.32 ± 4.35	2.51

The overall Error and different subsets (e.g. stenotic, non-stenotic, end diastolic analysis, and end systole analysis) of the dataset are shown