Validation and Development of a New Automatic Algorithm for Time-Resolved Segmentation of the Left Ventricle in Magnetic Resonance Imaging

Table 4

Clinical parameters in second observer subset. Differences for clinical parameters in the second observer subset () for second observer manual delineation versus manual reference delineation and for automatic segmentation versus manual reference delineation.

	Automatic segmentation versus manual reference			Second observer versus manual reference
	Absolute difference	Relative difference	value	Absolute difference	Relative difference	value
EDV	−9 ± 10 mL	−5 ± 5%	<0.01	10 ± 4 mL	6 ± 2%	<0.01
ESV	3 ± 8 mL	4 ± 12%	0.1	5 ± 5 mL	6 ± 6%	<0.01
EF	−3 ± 3%	−6 ± 6%	<0.01	0 ± 2%	−1 ± 4%	0.44
LVM	2 ± 16 g	3 ± 13%	0.55	−7 ± 9 g	−7 ± 8%	<0.01
SV	−12 ± 8 mL	−10 ± 6%	<0.01	5 ± 6 mL	5 ± 5%	<0.01
CO	−0.7 ± 0.4 L/min	−10 ± 6%	<0.01	0.3 ± 0.4 L/min	5 ± 5%	<0.01

Absolute and relative difference expressed as mean ± SD. EDV = end-diastolic volume, ESV = end-systolic volume, EF = ejection fraction, and LVM = left ventricular mass.