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Comparison of the distributions of CT dose index (CTDIvol) classified in terms of tube voltage used in paediatric examinations
| Anatomical regions | Tube voltage (kV) | CTDIvol |
p-value | ||
|---|---|---|---|---|---|
| n | Mean (mGy) | Coefficient of variation (%) | |||
| Head (non-helical) | 100 | 19 | 35.0 | 30 | <0.05 |
| 120 | 285 | 43.6 | 44 | ||
| Head (helical) | 100 | 15 | 31.5 | 35 | <0.05 |
| 120 | 252 | 42.4 | 43 | ||
| Chest | 80–100 | 47 | 5.0 | 63 | <0.05 |
| 120 | 216 | 10.5 | 87 | ||
| Abdomen | 80–100 | 45 | 6.4 | 84 | <0.05 |
| 120 | 214 | 12.6 | 76 | ||
Statistical analyses were performed using Welch's t-test.
