Table 3.

The impact of different channel numbers and different loss functions on IVPSQA (MEAN + STD)

	A: RTDose → PDose			B: RTDose + CT → PDose
Metrics	SSIM	RMSE (%)	MAE (%)	SSIM	RMSE (%)	MAE (%)
2 channels	0.9982 ± 0.0007	0.3475 ± 0.1459	0.1276 ± 0.0718	0.9976 ± 0.0009	0.3568 ± 0.1464	0.1450 ± 0.0719
4 channels	0.9983 ± 0.0007	0.3409 ± 0.1420	0.1237 ± 0.0723	0.9980 ± 0.0007	0.3450 ± 0.1421	0.1379 ± 0.0733
6 channels	0.9983 ± 0.0007	0.3511 ± 0.1544	0.1282 ± 0.0790	0.9980 ± 0.0008	0.3516 ± 0.1528	0.1394 ± 0.0816
L1-norm	0.9982 ± 0.0007	0.3475 ± 0.1459	0.1276 ± 0.0718	0.9976 ± 0.0009	0.3568 ± 0.1464	0.1450 ± 0.0719
L2-norm	0.9982 ± 0.0008	0.3510 ± 0.1491	0.1301 ± 0.0789	0.9965 ± 0.0008	0.3610 ± 0.1422	0.1630 ± 0.0745