| Idiopathic interstitial pneumonias | High-resolution computed tomography features |
| UIP | Reticular pattern with presence or absence of transaction bronchiectasis, honeycombing appearance, basal and subpleural predomination, in UIP pattern deficits of features listed as inconsistent with UIP. |
| NSIP | Bilateral ground glass regions, reticular opacities. |
| RB-ILD | Badly defined centrilobular nodules, bronchial wall thickening or centrilobular emphysema. |
| DIP | Diffuse ground glass opacities, irregular linear opacities, Microcysts. |
| COP | Distinctive peripheral or peribronchial patchy consolidations, Ground-glass opacities with migrating tendency, rarely a mass or nodule that may cavitate the typical appearance of an “atoll sign”. |
| AIP | Ground glass attenuation regions with mosaic pattern, independent area with air space consolidation. |
| LIP | Perivascular cysts and ground glass opacities, centrilobular and subpleural nodules. |
| PPFE | Apical regions with subpleural thickening, small subpleural consolidations. |