Table 1.
CT scanning and reconstruction parameters in some recent LCS trials
| Study | Detectors | Voltage (kVp) | Tube current (mA) | Pitch | Rotation time (s) | Effective dose (mSv) | Slice thickness (mm) | Reconstruction interval (mm) |
|---|---|---|---|---|---|---|---|---|
| I-ELCAP | ≥4 | ≤120 | ≤40 | 1.5 | 0.5 | 1–2 | 1.25 | 1.25 |
| NLST | ≥4 | 120–140a | 40–80a | NA | NA | 1.5 | 1.0–3.2 | 1.0–2.5 |
| UKLS | >16 | 90 (<50 kg) | –b | 0.9–1.1 | NA | <2 | NA | NA |
| 120 (50–80 kg) | ||||||||
| 140 (>80 kg) | ||||||||
| NELSON | 16 | 100 (<60 kg) | 20 | 1.5 | NA | <2 | 1 | 0.7 |
| 120 (60–80 kg) | ||||||||
| 140 (>80 kg) |
NA, not available.
aDepending on the CT scanner and the participant’s body habitus.
bDepending on the CT scanner adjusted to achieve the volume CT dose index given.