Table 2 Percent contrast and percent background variability evaluated with the brain-size image-quality phantom
Parameter | Sphere diameter (mm) | |||||
|---|---|---|---|---|---|---|
10 | 13 | 17 | 22 | 28 | 37 | |
Percent contrast for hot spheres (%) | 49.9 ± 23.3 | 63.2 ± 22.6 | 72.4 ± 22.0 | 79.5 ± 21.5 | – | – |
Percent contrast for cold spheres (%) | – | – | – | – | 81.8 ± 6.7 | 84.8 ± 7.1 |
Percent background variability (%) | 4.2 | – | – | – | – | – |