TABLE 5

Image Quality Phantom Results for 4:1 Lesion-to-Background Ratio

Sphere diameter (mm)	Contrast recovery coefficient			Coefficient of variation
Sphere diameter (mm)	3 min	6 min	12 min	3 min	6 min	12 min
10	0.056 ± 0.037	0.038 ± 0.031	0.035 ± 0.023	13.00 ± 1.10	9.77 ± 1.07	8.23 ± 1.63
13	0.126 ± 0.032	0.115 ± 0.011	0.119 ± 0.025	13.40 ± 1.10	10.00 ± 1.30	8.34 ± 1.71
17	0.212 ± 0.082	0.192 ± 0.033	0.196 ± 0.011	11.20 ± 0.90	8.41 ± 0.91	7.27 ± 1.53
22	0.272 ± 0.026	0.264 ± 0.018	0.265 ± 0.012	10.80 ± 1.20	8.38 ± 0.61	7.41 ± 1.28
28	0.494 ± 0.020	0.515 ± 0.043	0.515 ± 0.020	9.56 ± 0.75	7.23 ± 0.52	6.54 ± 1.12
37	0.542 ± 0.045	0.571 ± 0.032	0.569 ± 0.017	8.49 ± 0.63	6.61 ± 0.44	6.20 ± 0.81
Foam insert	0.605 ± 0.025	0.596 ± 0.005	0.596 ± 0.020	8.02 ± 0.67	6.51 ± 0.41	6.17 ± 0.68