Table 2.

Repeatability of left ventricular blood pool shape features in end-diastole.

Feature name	Robustness	ICC (95% CI)	CV (%)	MRD (%)
Volume	Excellent	0.957 (0.927, 0.975)	5.35	5.58
Least axis length	Excellent	0.950 (0.916, 0.971)	2.39	2.51
Minor axis length	Good	0.879 (0.800, 0.928)	3.35	2.93
Surface area	Good	0.876 (0.796, 0.926)	5.77	5.75
Surface area to volume ratio	Good	0.869 (0.785, 0.921)	3.46	3.5
Maximum 2D diameter (slice)	Good	0.844 (0.747, 0.906)	4.15	4.29
Maximum 2D diameter (column)	Good	0.777 (0.646, 0.864)	4.34	4.96
Elongation	Good	0.775 (0.642, 0.863)	5.7	5.94
Major axis length	Good	0.764 (0.626, 0.856)	4.72	4.75
Flatness	Moderate	0.747 (0.602, 0.845)	5.9	6.06
Maximum 2D diameter (row)	Moderate	0.746 (0.601, 0.844)	4.95	5.3
Maximum 3D diameter	Moderate	0.698 (0.532, 0.813)	5.19	5.64
Compactness 2	Moderate	0.575 (0.367, 0.729)	10.55	9.39
Compactness	Moderate	0.554 (0.339, 0.714)	5.34	4.72
Sphericity	Moderate	0.546 (0.329, 0.708)	3.57	3.15
Spherical disproportion	Moderate	0.511 (0.285, 0.683)	3.57	3.15

CI, confidence interval; CV, coefficient of variation; ICC, intra-class correlation coefficient; MRD, mean relative difference.