. Author manuscript; available in PMC: 2019 Jun 1.

Published in final edited form as: IEEE Trans Med Imaging. 2018 Jun;37(6):1511–1521. doi: 10.1109/TMI.2018.2829896

TABLE III.

PSNR, ISNR, and SSIM Values of ROI (rhombus) by Different Reconstruction Algorithms for the Cs Phantom

Incident photon	Penalty	Noise level (×10⁻⁵)	PSNR	I SNR	SSIM
5×10³	FDK	120	25.76	/	0.66
	TV	3.51	35.38	9.61	0.95
	Ours	3.46	38.32	12.55	0.98
1×10⁴	FDK	95.20	28.84	/	0.79
	TV	2.79	36.72	7.87	0.96
	Ours	2.74	39.36	10.52	0.98
5×10⁴	FDK	52.10	33.93	/	0.93
	TV	1.96	39.98	6.05	0.98
	Ours	1.96	40.87	6.94	0.98