CTDIvol (mGy)* | |||||
Weight (kg) | Lateral distance (cm) | Average age (y) | CTAC | CTAC+CTL | CTAC+CTL+Dx |
2.5–12.2 | 7–11 | <1 | 0.6–0.8 | 1.1–1.5 | 1.9–2.5 |
8.1–23.8 | 12–18 | 1–5 | 0.7–1.0 | 1.4–2.0 | 2.4–3.4 |
14.7–45.6 | 19–23 | 5–10 | 0.8–1.3 | 1.6–2.6 | 2.7–4.3 |
25.9–78.3 | 24–28 | 10–15 | 1.1–1.7 | 2.1–3.4 | 3.5–5.7 |
40.5–95.7 | 29–33 | >15 | 1.6–2.6 | 3.1–5.3 | 5.2–8.8 |
*CTDIvol ranges represent the dose to the CT dose index 32-cm phantom. Older scanners may report body protocols on pediatric patients as the CTDIvol to the 16-cm phantom. To convert the above CTDIvol 32-cm phantom measurements to the 16-cm phantom, multiply these values by 2.