Simulated exposure for CTP examinations at each level of noise added
| Noise Level | Added Noise Distribution, σ(add) | Simulated Exposure, E2 (Range) (mAs) |
|---|---|---|
| 1 | 0.8 | 188 (187–188) |
| 2 | 2.0 | 177 (174–180) |
| 3 | 2.8 | 167 (161–171) |
| 4 | 5.3 | 127 (116–135) |
| 5 | 13.7 | 44 (36–51) |
Note:—The range is determined using noise values of the reference scans at 1 SD above and below the mean, σ(E1) = 7.5 ± 0.8.
E2 indicates second exposure level.