Table 2.
Mean and range deviations in volume (in % of the true volume) and amplitude (in cm) across institutions per sphere size and motion tested (minus signs mean an underestimation).
| Motion | Sphere radius (mm) | Volume deviations (% of true volume) |
Amplitude deviations (cm) | |||
|---|---|---|---|---|---|---|
| End of inspiration | End of expiration | Mid-ventilation | Average CT | |||
| I: 15 mm/3 s | 7.5 | 14.1% | 2.2% | 16.2% | 43.2% | −0.08 |
| (−5.6, 40.8) | (−8.4, 20.2) | (3.3, 35.4) | (22.1, 66.4) | (−0.25, −0.01) | ||
| 12.5 | 7.7% | 1.1% | 11.3% | 41.4% | −0.08 | |
| (−2.3, 33.9) | (−1.6, 5.6) | (3.5, 36.0) | (26.3, 62.4) | (−0.26, −0.01) | ||
| II: 15 mm/6 s | 7.5 | 3.8% | 1.0% | 11.2% | 12.4% | −0.18 |
| (−98.7, 39.7) | (−1.5, 6.0) | (−33.8, 29.9) | (−33.8, 36.3) | (−0.60, 0.01) | ||
| 12.5 | 21.5% | 2.1% | 13.2% | 31.8% | −0.13 | |
| (−3.5, 68.5) | (−1.5, 3.5) | (0.1, 28.9) | (13.7, 45.9) | (−0.28, −0.01) | ||
| III: 25 mm/4 s | 7.5 | 21.3% | −1.0% | 21.4% | 22.8% | −0.14 |
| (−13.8, 64.8) | (−12.9, 5.9) | (−3.9, 51.1) | (−2.1, 44.6) | (−0.35, −0.02) | ||