Table 3.
Analysis by examination type of average CTDIvol per sequence and total DLP per examination, for distribution of median values per CT scanner
| CT protocol | Median values of CTDIvol per sequence | Median values of DLP per examination | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Range, min–max (max/min ratio) | 1st quartile (25%) | Median (50%) | Mean | 3rd quartile (75%) | Range, min–max (max/min ratio) | 1st quartile (25%) | Median (50%) | Mean | 3rd quartile (75%) | |
| Head without CM | 6.4–54.7 (8.6) | 27.2 | 29.9 | 32.1 | 39.6 | 384.8–743.0 (1.9) | 491.4 | 639.3 | 592.7 | 693.1 |
| Head with CM | 25.0–54.7 (2.2) | 34.6 | 41.4 | 41.1 | 48.0 | 430.0–1168.0 (2.7) | 676.4 | 772.2 | 780.1 | 818.7 |
| Abdomen-pelvis without CM | 4.4–15.7 (3.6) | 9.1 | 11.0 | 10.9 | 13.5 | 330.0–1186.8 (3.6) | 551.1 | 656.2 | 683.2 | 811.8 |
| Abdomen-pelvis with CM | 11.3–25.0 (2.2) | 13.3 | 16.9 | 17.2 | 20.4 | 363.0–1698.0 (4.7) | 533.6 | 606.5 | 825.9 | 1023.1 |
| Chest | 4.7–12.3 (2.6) | 5.6 | 7.1 | 7.8 | 10.2 | 137.5–360.8 (2.6) | 227.2 | 251.7 | 255.0 | 276.2 |