Table 4.

PSNR and SSIM for LPD-algorithm on miniPET data, evaluated against the target reconstruction. $\mathsf{\Delta }$PSNR and $\mathsf{\Delta }$SSIM are computed by subtracting the respective value of 20-iterations MLEM on the same data.

	LPD 3 Iterations miniPET
PSNR	25.20
$\mathsf{\Delta }$PSNR	+2.59
SSIM	0.60
$\mathsf{\Delta }$SSIM	−0.18