A Comparative Study of Four Total Variational Regularization Reconstruction Algorithms for Sparse-View Photoacoustic Imaging

Table 2

Numerical results of the blood vessel phantom with different sampling positions.

Experimental	CPU time (seconds)				SNR (dB)				NMAE
Positions	TVAL3	L1magic	NESTA	TwIST	TVAL3	L1magic	NESTA	TwIST	TVAL3	L1magic	NESTA	TwIST
5	2.68	258.02	1.5	0.29	2.58	0.1	1.59	0.05	71.86	95.62	80.54	97.03
10	4.3	280.44	1.8	0.56	6.07	0.89	2.38	0.36	48.09	87.3	73.56	93.73
15	6.31	338.66	2.24	0.82	9.97	1.98	2.99	0.8	30.71	77.04	68.55	89.99
20	8.22	366.16	2.59	1.19	15.55	2.54	3.69	1.2	16.14	72.26	63.28	84.25
25	10	411.43	2.92	1.48	22.63	3.66	4.38	2.98	7.15	63.51	58.41	68.62
30	11.88	467.69	3.4	1.65	34.49	4.82	4.73	5.08	1.83	55.53	56.12	53.94
35	13.17	481.37	3.87	1.94	42.76	6.31	5.48	10.95	0.7	46.8	51.46	27.42
40	11.91	619.74	4.59	2.53	48.43	7.65	6.36	19.28	0.37	40.11	46.51	10.51
45	12.22	524.17	4.77	2.13	51.61	9.18	6.71	20.4	0.25	33.64	44.71	9.24
50	12.09	672.54	5.39	2.18	54.11	10.8	7.4	23.03	0.19	27.92	41.27	6.83
55	11.3	551.73	5.49	2.81	55.39	12.57	8.21	25.27	0.16	22.76	37.6	5.27
60	12.29	626.07	5.95	2.65	57.93	14.47	8.79	26.56	0.12	18.29	35.19	4.54
Average	9.7	466.5	3.71	1.69	33.46	6.25	5.23	11.33	14.8	53.4	54.77	45.95