Table 2.
Prospective validation in pigs
| Parameter | Spiral, 180 mAs | Sequential, 20 mm feed, 180 mAs | Sequential LD, 20 mm feed, 50 mAs | ||
|---|---|---|---|---|---|
| p | p | ||||
| CTDI (mGy) | 4.4 (4.1–4.9) | 0.46 (0.41–0.51) | 0.029 | 0.18 (0.15–0.18) | <0.001 |
| DLP (mGy·cm) | 113.7 (103.2–138.6) | 10.2 (9.5–12.6) | 0.029 | 4.0 (3.4–4.7) | <0.001 |
| E (mSv) | 2.3 (2.1–2.8) | 0.21 (0.19–0.26) | 0.029 | 0.09 (0.07–0.10) | <0.001 |
| Scan acquisition time (s) | 6.8 (6.3–7.0) | 22.7 (21.4–25.4) | 0.004 | 24.1 (22.3–26.3) | <0.001 |
| Number of slices | 244 (227–252) | 12 (11–13) | <0.001 | 12 (11–13) | 0.001 |
Dosimetry, scan execution time and number of acquired slices in the three scan protocols in pigs. P values refer to the paired comparison with the reference spiral scan. CTDI computed tomography dose index, DLP dose length product, E effective dose. Data are median and (interquartile range)