Table 2.
Scan parameters used to obtain the CTs
| CF subjects | Control subjects | |||
|---|---|---|---|---|
| Scan acquisition | Inspiration | Expiration | Inspiration | Expiration |
| Tube voltage (kV) | 80 | 80 | (80–120) | (80–120) |
| Pitch | 0.85 | 0.85 | 0.85 | 0.85 |
| Slice thickness (mm), median (range) | 1 (0.75–1) | 1 (0.75–1) | 1 | 1 |
| Reconstruction increment (mm), median (range) | 0.6 (0.3–1) | 0.6 (0.3–1) | 0.8 (0.6–0.8) | 0.8 (0.6–0.8) |
| Reconstruction kernel | B70f;B75f | B70f;B75f | B75f; I70f | B75f;I50f |
| Collimation | 128x0.6 | 128x0.6 | 128x0.6 | 128x0.6 |
| Current-time product (mAs), median (range) | 46 (36–52) | 44 (35–53) | 28 (11–61) | 23 (8–65) |
| CTDIvol,32 cm (mGy), median (range) | 0.74 (0.57–0.83) | 0.71 (0.56–0.84) | 0.76 (0.32–1.13) | 0.56 (0.24–1.05) |
| DLP(mGy * cm), median (range) | 21 (14–28) | 17 (11–25) | 22.5 (7–38) | 14.5 (5–30) |