Table 2.
HRCT scoring system according to Gay SE et al.*
| Score | Alveolar | Interstitial |
|---|---|---|
| 0 |
No alveolar disease |
No interstitial disease |
| 1 |
GGO < 5% |
Septal thickening, no honeycombing |
| 2 |
GGO < 25% |
HC/ septal thickening < 25% |
| 3 |
GGO 25-49% |
HC/septal thickening 25-49% |
| 4 |
GGO 50-75% |
HC/septal thickening 50-75% |
| 5 | GGO > 75% | HC/septal thickening > 75% |
Scored fields = peak of aortic arch, tracheal bifurcation, most prominent convexity of the right ventricle, and peak of the right cupola of diaphragm. Mean interstitial and alveolar scores were counted.
GGO ground glass opacity, HC honeycombing.
*[9].