COG Incongruence of 4 Lung Regions
| Region and respiration protocol | No. of lesions | Mean ± SD (mm) | Minimum (mm) | Maximum (mm) |
|---|---|---|---|---|
| Apex, breathing | 5 | 4.4 ± 1.6 | 1.7 | 5.4 |
| Apex, holding | 7 | 3 ± 1.2 | 1.7 | 4.8 |
| Central, breathing | 9 | 4 ± 1.1 | 1.9 | 5.9 |
| Central, holding | 10 | 3.3 ± 1.4 | 0.7 | 5.3 |
| Peripheral, breathing | 13 | 6.5 ± 3.6 | 3.4 | 14.7 |
| Peripheral, holding | 11 | 6 ± 2.9 | 0.5 | 11.4 |
| Base, breathing | 10 | 8.2 ± 1 | 7.2 | 9.8 |
| Base, holding | 10 | 6.2 ± 2.6 | 2.9 | 11.3 |
Apex, central, peripheral, and base = 4 lung regions; breathing = CT scan acquired during shallow breathing; holding = CT scan acquired during respiratory arrest after normal expiration.