Table 4.

Quantitative evaluation of domain adaptation. Images from Site $A$ and one of Sites $C$ and $D$ are included in the training. We report SSIM and PSNR; higher values are better for both.

Training	Testing		Before DA	After DA
$A$,	$C\to$	SSIM	0.8359 ± 0.0253	0.8480 ± 0.0287
$D$	$D$	PSNR	27.76 ± 0.57	29.07 ± 0.71
$A$,	$D\to$	SSIM	0.7893 ± 0.0216	0.7990 ± 0.221
$C$	$C$	PSNR	27.12 ± 0.47	27.51 ± 0.52