Table 1.

Quantitative evaluation results between ground truth CT images and sCT images: MAE, SSIM, and PSNR.

Model	MAE ± SD (HU)	SSIM ± SD	PSNR ± SD (dB)
U-Net	65.36 ± 4.08	0.972 ± 0.004	28.84 ± 0.57
CycleGAN	93.95 ± 5.89	0.955 ± 0.007	26.32 ± 0.55