Table 4.

Numerical results of the proposed and state-of-the-art dictionary learning methods.

Method	MAE (HU)	PSNR (dB)	NCC	SI (Air)	SI (Soft-tissue)	SI (Bone)
Int	148.9 ± 42.3	18.3 ± 0.9	0.80 ± 0.05	0.80 ± 0.09	0.57 ± 0.12	0.51 ± 0.13
FP	125.5 ± 24.5	19.1 ± 1.1	0.80 ± 0.05	0.93 ± 0.02	0.72 ± 0.07	0.56 ± 0.18
FSJDL	82.6 ± 26.1	22.4 ± 1.9	0.91 ± 0.04	0.98 ± 0.01	0.88 ± 0.03	0.69 ± 0.08
FSJDL versus Int ($p$-value)	$<0.001$	$<0.001$	$<0.001$	$<0.001$	$<0.001$	0.002
FSJDL versus FP ($p$-value)	$<0.001$	$<0.001$	$<0.001$	$<0.001$	$<0.001$	0.036