| 75th percentile of DLP (mGy∙cm) | 4 MDCT | 8 MDCT | 16 MDCT |
| DRLs for cerebral CT | 1300 | 1146 | 662 |
| DRLs for abdominopelvic CT | 725 | 668 | 796 |
| DRLs for lumbar spine CT | 705 | 622 | 1728 |
| DRLs for chest CT | 505 | 512 | 812 |