Table 1.

Numerical results of using the three loss functions on brain and pelvic sCT images.

Loss function	Brain			Pelvis
	MAE (HU)	PSNR (dB)	NCC	MAE (HU)	PSNR (dB)	NCC
MAD	59.3±4.7	25.05±1.13	0.959±0.005	55.1±7.8	24.31±1.32	0.919±0.014
MSD	64.8±5.0	24.77±1.17	0.946±0.005	65.0±8.1	24.34±1.33	0.899±0.015
MPD	57.5±4.6	25.79±1.11	0.965±0.05	49.4±7.4	24.49±1.31	0.926±0.013
P-value MPD vs. MAD	0.048	0.633	0.812	0.05	0.243	0.713
P-value MPD vs. MSD	0.036	0.338	0.766	<0.001	0.598	0.301