Table 1 Protocol and scanner settings.
From: Radiation dose optimisation in paediatric head CT using attenuation-based auto prescription
Age range | Age based protocol | Attenuation based protocol | |
|---|---|---|---|
All patients | Scanmode | Axial wide detector | Axial wide detector |
Kernel and filter | Head | Head | |
Image reconstruction | DLIR high | DLIR high | |
0–1 years | Scan field of view | Ped head | Ped head |
kV | 100 | 100 | |
mA (minimum/maximum) | 50/420 | 50/420 | |
dw, in cm | < 14.6 | < 14.6 | |
Noise index | 2.8 | 3.2 | |
Rotation time, in seconds | 0.5 | 0.5 | |
1–5 years | Scan field of view | Small head | Small head |
kV | 120 | 120 | |
mA (minimum/maximum) | 50/425 | 50/425 | |
dw (minimum/maximum), in cm | 14.6/15.8 | 14.6/15.8 | |
Noise index | 2.5 | 2.9 | |
Rotation time, in seconds | 0.35 | 0.35 | |
5–10 years | Scan field of view | Small head | Small head |
kV | 120 | 120 | |
mA (minimum/maximum) | 50/405 | 50/405 | |
dw (minimum/maximum), in cm | 15.8/17.1 | 15.8/17.1 | |
Noise index | 2.6 | 3.4 | |
Rotation time, in seconds | 0.6 | 0.6 | |
10–16 years | Scan field of view | Head | Head |
kV | 120 | 120 | |
mA (minimum/maximum) | 50/405 | 50/405 | |
dw (minimum/ maximum), in cm | 17.1/18.2 | 17.1/18.2 | |
Noise index | 2.6 | 3.4 | |
Rotation time, in seconds | 0.6 | 0.6 | |
16 plus years | Scan field of view | Head | Head |
kV | 120 | 120 | |
mA (minimum/maximum) | 50/480 | 60/270 | |
dw (minimum/maximum), in cm | 18.2/25 | 18.2/25 | |
Noise Index | 2.6 | 3.4 | |
Rotation time, in seconds | 0.8 | 0.8 |
