TABLE 4

Image-Quality Phantom Results for 8:1 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	0.060 ± 0.018	0.059 ± 0.020	0.059 ± 0.013	14.0 ± 0.90	11.3 ± 1.00	9.13 ± 0.63
13	0.194 ± 0.048	0.189 ± 0.013	0.190 ± 0.005	14.4 ± 1.00	11.6 ± 0.90	9.35 ± 0.56
17	0.155 ± 0.007	0.153 ± 0.002	0.153 ± 0.001	12.0 ± 0.90	9.72 ± 0.84	8.03 ± 0.62
22	0.342 ± 0.025	0.352 ± 0.025	0.353 ± 0.016	11.4 ± 0.90	9.09 ± 0.72	7.62 ± 0.58
28	0.391 ± 0.070	0.446 ± 0.071	0.446 ± 0.048	10.0 ± 0.60	8.02 ± 0.67	6.88 ± 0.60
37	0.624 ± 0.048	0.615 ± 0.032	0.617 ± 0.021	8.25 ± 0.50	6.84 ± 0.73	6.10 ± 0.62
Foam insert	0.677 ± 0.019	0.693 ± 0.023	0.694 ± 0.015	7.40 ± 0.51	6.35 ± 0.71	5.78 ± 0.58