Table 1.

Comparison of modified contours versus auto-segmented contours of 11 cardiac substructures. The reported range values are from data within the 95% confidence interval of mean surface distance.

	Dice Similarity Coefficient		Mean Surface Distance (mm)
	Mean ± SD	Range (min, max)	Mean ± SD	Range (min, max)
Heart	0.95 ± 0.04	(0.91, 0.98)	2.1 ± 1.8	(0.9, 3.8)
Left atrium	0.89 ± 0.05	(0.82, 0.97)	1.8 ± 0.7	(0.7, 3.1)
Left ventricle	0.91 ± 0.06	(0.76, 0.97)	2.2 ± 1.8	(0.7, 5.6)
Right atrium	0.86 ± 0.12	(0.72, 0.94)	2.3 ± 2.2	(1.0, 4.0)
Right ventricle	0.87 ± 0.10	(0.65, 0.96)	2.7 ± 2.2	(0.8, 6.1)
Superior vena cava	0.84 ± 0.14	(0.46, 0.98)	1.7 ± 1.3	(0.3, 4.2)
Inferior vena cava	0.78 ± 0.15	(0.53, 0.93)	2.9 ± 5.1	(0.9, 6.3)
Pulmonary artery	0.86 ± 0.05	(0.77, 0.93)	2.2 ± 0.7	(1.0, 3.2)
Pulmonary vein	0.73 ± 0.08	(0.58, 0.90)	2.0 ± 0.7	(0.8, 3.3)
Descending aorta	0.92 ± 0.04	(0.84, 0.99)	1.3 ± 0.6	(0.3, 2.5)
Ascending aorta	0.92 ± 0.06	(0.80, 0.97)	1.4 ± 0.8	(0.6, 2.8)

Abbreviation: SD, standard deviation