Table 1:

Simulated exposure for CTP examinations at each level of noise added

Noise LevelAdded Noise Distribution, σ(add)Simulated Exposure, E2 (Range) (mAs)
10.8188 (187–188)
22.0177 (174–180)
32.8167 (161–171)
45.3127 (116–135)
513.744 (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.