Automatic segmentation of myocardium at risk from contrast enhanced SSFP CMR: validation against expert readers and SPECT

Table 4 Analysis of incremental value of each block in the automatic Segment MaR CE-SSFP algorithm (n = 183)

	MaR bias [% of LVM]	Regression	DSC
	MaR bias [% of LVM]	R-value	DSC
Intensity classification by EM	2 ± 8	0.60	0.65 ± 0.18
+ intensity correction^a	2 ± 8	0.63	0.74 ± 0.12
+ a priori on MaR	-4 ± 10	0.62	0.81 ± 0.16
+ infarct region from LGE	1 ± 6	0.83	0.85 ± 0.08

EM Expectation Maximization, MaR Myocardium at risk, LGE late gadolinium enhancement, LVM Left ventricular mass, DSC Dice similarity coefficient, ^aapplied in 127/183 patients

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