Table 3.

Mean bias (mean difference) and the 95% limits of agreement (variability is expressed as mean difference ± 1.96 SD between the two measurements) for EDV, ESV, SV and EF after comparing our interventional system to the other two software systems, circle CVI42 (16 patients and 3 volunteers) and TomTec (11 patients)

	Interventional system versus CVI42				Interventional system versus TomTec
	EDV (ml)	ESV (ml)	SV (ml)	EF (%)	EDV (ml)	ESV (ml)	SV (ml)	EF (%)
Mean bias	0.530	1.086	$-$ 0.565	$-$ 0.321	28.195	28.032	0.146	$-$ 2.214
$+1.96$ SD	3.029	3.684	1.619	0.468	108.375	100.664	28.868	9.333
$-1.96$ SD	$-$ 1.969	$-$ 1.511	$-$ 2.749	$-$ 1.109	$-$ 51.984	$-$ 44.600	$-$ 28.575	$-$ 13.760