Table 4.

Evaluation of four models on real X-ray images. Dice score were shown as mean and standard deviation (SD). Bold indicates highest Dice score.

	TorchXRayVision	U-Net(Real)	U-Net($\text{Real}+{\text{Syn}}_{\mathit{cen}}$)	U-Net($\text{Real}+{\text{Syn}}_{\mathit{all}}$)
Mean	42.03	92.58	91.96	92.30
SD	32.62	7.14	9.47	8.29