Radiation dose and scan length by age
| Younger Than 1 Year | 1 Year to Younger Than 5 Years | 5 Years to Younger Than 10 Years | 10 Years to Younger Than 18 Years | All Children | |
|---|---|---|---|---|---|
| No. of children | 7 | 42 | 27 | 50 | 126 |
| Mean original z-length (cm) | 13.91 | 15.93 | 19.94 | 24.77 | 20.18 |
| Mean modified z-length (cm) | 6.63 | 8.04 | 10.32 | 13.04 | 10.43 |
| % Decrease in mean z-length for modified CT | 52 | 50 | 48 | 47 | 48 |
| Mean effective dose for original CT (mSv) | 0.86 | 0.63 | 0.73 | 1.53 | 1.02 |
| Mean effective dose for modified CT (mSv) | 0.41 | 0.32 | 0.38 | 0.83 | 0.54 |
| % Decrease in mean effective dose for modified CT | 53 | 49 | 48 | 46 | 47 |