Table 4.
Scanners and scanning protocols used on the COPD and non-COPD subjects.
| Institution (subjects, n) | JNUH (296/596) | KNUH (300/596) |
|---|---|---|
| Scanner manufactory | Siemens definition flash 128 slices | Siemens definition AS 64 slices |
| Scan type | Spiral | Spiral |
| Rotation time(s) | 0.5 | 0.5 |
| Detector configuration | 128 × 0.6 mm | 64 × 0.6 mm |
| Pitch | 1 | 1 |
| Peak kilo voltage, kVp | 120 | 140 |
| Exposure (mAs) | 110, Effective for inspiration 50, Effective for expiration | 100, Effective for both inspiration and expiration |
| Dose modulation | Care dose OFF | Care dose OFF |
| Reconstruction algorithm | B35f. | B30f. |
| Thickness (mm) | 1 | 0.6 |
JNUH, Jeonbuk National University Hospital; KNUH, Kangwon National University Hospital; mAs, milliampere-seconds.