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Table 1
Number of studies employing ionizing radiation (CT, NM) and doses absorbed by children, and the number of other imaging studies (US and MRI) performed in children in 2009–2015.
| Patient no. | Age of patienta (years) | Number of CT examinations | Number of NM examinations | Cumulative effective dose CT (mSv) |
Cumulative effective dose NM (mSv) |
The highest sum of effective doses (CT + NM) absorbed per year (mSv) | Number of US/MRI examinations |
|---|---|---|---|---|---|---|---|
| 1 | 0.3 | 12 | 5 | 127.2 | 200.2 | 327.4 | 11/– |
| 2 | 0.8 | 3 | 3 | 80.2 | 118.8 | 199.0 | –/– |
| 3 | 0.1 | 3 | 4 | 39.3 | 160.6 | 199.9 | 7/– |
| 4 | 0.1 | 13 | 8 | 173.6 | 315.5 | 489.1 | 4/– |
| 5 | 3 | 8 | 6 | 76.3 | 151.1 | 227.4 | 6/1 |
| 6 | 5 | 15 | 9 | 92.6 | 190.2 | 282.8 | 15/– |
| 7 | 0.4 | 1 | 1 | 20.8 | 40.7 | 61.5 | 4/– |
| 8 | 8 | 9 | 8 | 111.5 | 116.8 | 228.3 | 2/1 |
| 9 | 1 | 13 | 10 | 166.1 | 369.6 | 535.8 | 9/2 |
| 10 | 2 | 11 | 8 | 139.0 | 245.2 | 384.1 | 3/– |
| 11 | 1 | 3 | 3 | 36.0 | 121.0 | 157.0 | 9/– |
| 12 | 1 | 2 | 1 | 21.5 | 36.3 | 57.8 | –/1 |
| 13 | 10 | 9 | 6 | 58.8 | 102.8 | 161.6 | 10/1 |
| 14 | 2 | 6 | 4 | 67.1 | 159.5 | 226.6 | 9/– |
| 15 | 0.7 | 11 | 9 | 92.5 | 321.2 | 413.7 | 2/– |
| 16 | 0.3 | 3 | 3 | 11.8 | 115.5 | 127.3 | 8/– |
| 17 | 7 | 3 | 3 | 28.5 | 67.1 | 95.6 | 2/2 |
| 18 | 0.1 | 4 | 2 | 9.7 | 75.9 | 85.6 | 10/– |
| 19 | 4 | 10 | 9 | 65.0 | 202.9 | 267.9 | 9/9 |
| 20 | 1 | 4 | 5 | 87.9 | 172.3 | 260.2 | 4/1 |
| 21 | 2 | 12 | 5 | 157.6 | 28.6 | 186.2 | 6/6 |
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