COG Incongruence: Upper and Central Parts vs. Peripheral and Lower Parts of Lung
| Region and respiration protocol | No. of lesions | Mean ± SD (mm) | Minimum (mm) | Maximum (mm) |
|---|---|---|---|---|
| Apical and central, breathing | 14 | 4.1 ± 1.2 | 1.7 | 5.9 |
| Apical and central, holding | 17 | 3.2 ± 1.3 | 0.7 | 5.3 |
| Peripheral and base, breathing | 23 | 7.2 ± 2.9 | 3.4 | 14.7 |
| Peripheral and base, holding | 21 | 6.1 ± 2.7 | 0.5 | 11.4 |
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.