From: Low-dose CT for quantitative analysis in acute respiratory distress syndrome
60 mAs to 15 mAs | Mean ± SD60 | Mean ± SD15 | P | r 2 | Bias | LOA | |
---|---|---|---|---|---|---|---|
Baseline ( n = 18) | Lung volume (ml) | 3,227 ± 1,015 | 3,224 ± 995 | 0.80 | 1.0 | 3.4 | -112.0 to 118.8 |
 | Lung tissue mass (g) | 711 ± 128 | 707 ± 129 | 0.17 | 0.99 | 4.3 | -21.8 to 30.4 |
 | Hyperinflated tissue (%) | 3.3 ± 5.5 | 3.9 ± 5.6 | <0.001 | 0.99 | -0.7 | -1.8 to 0.5 |
 | Normally aerated tissue (%) | 81.4 ± 7.5 | 81.1 ± 6.6 | 0.22 | 0.93 | 0.3 | -4.2 to 4.8 |
 | Poorly aerated tissue (%) | 13.3 ± 6.2 | 12.9 ± 6.2 | 0.84 | 0.91 | 0.4 | -3.3 to 4.1 |
 | Non aerated tissue (%) | 2.1 ± 1.4 | 2.1 ± 1.5 | 0.04 | 0.96 | -0.1 | -0.6 to 0.5 |
ARDS ( n = 18) | Lung volume (ml) | 2,295 ± 561 | 2,264 ± 526 | 0.07 | 0.99 | 31.4 | -105.8 to 168.6 |
 | Lung tissue mass (g) | 1,778 ± 315 | 1,775 ± 301 | 0.78 | 0.98 | 3.0 | -85.1 to 91.1 |
 | Hyperinflated tissue (%) | 0.1 ± 0.2 | 0.2 ± 0.2 | 0.008 | 0.94 | 0.0 | -0.1 to 0.1 |
 | Normally aerated tissue (%) | 9.3 ± 9.7 | 8.8 ± 9.4 | 0.13 | 0.98 | 0.5 | -2.1 to 3.2 |
 | Poorly aerated tissue (%) | 28.1 ± 13.4 | 28.6 ± 12.6 | 0.44 | 0.96 | -0.5 | -4.8 to 3.9 |
 | Non aerated tissue (%) | 62.5 ± 21.2 | 62.5 ± 20.0 | 0.98 | 0.98 | 0.0 | -6.9 to 6.9 |