Table 5.

Ablation study for AttU-Net, MSAttU-Net, U-Net++, and MSU-Net++.

Architecture	BUL	EM	NS
	M ± SD	M ± SD	M ± SD
AttU-Net (Oktay et al., 2018)	0.607 ± 0.039	0.853 ± 0.043	0.655 ± 0.020
MSAttU-Net (Ours)	0.674 ± 0.005	0.895 ± 0.004	0.677 ± 0.010
U-Net++ (Zhou et al., 2020)	0.670 ± 0.020	0.885 ± 0.013	0.665 ± 0.012
MSU-Net++ (Ours)	0.687 ± 0.009	0.895 ± 0.002	0.691 ± 0.022

MSAttU-Net and MSU-Net ++ are extended versions of AttU-Net and U-Net ++. Intersection over Union (IoU) is used as the evaluation metric for comparison.