Table 1 Patterns in fibrotic and non-fibrotic lung

Airway centered fibrosis (952)

Fibrosis along the bronchovascular bundles with mosaic attenuation

No fibrosis (555)

Usual interstitial pneumonitis (697)

Subpleural basilar predominant fibrosis with or without honeycombing

Bilateral transplant (142)

Sarcoid (516)

Upper lobe posterior predominant airway centered fibrosis

Mycobacterial avium intracellular (81)

Right middle lobe and lingula predominant mucoid impaction

Nonspecific interstitial pneumonitis (476)

Homogeneous lower lung predominant fibrosis

Pneumonia (72)

Unilateral transplant (244)

Nonspecific pattern of fibrosis in the native lung with volume loss

Bronchial disease (63)

Bronchial wall thickening and mosaic attenuation

Combined fibrosis and emphysema (113)

Fibrosis with 10%greater centrilobular type emphysema

Emphysema (56)

Ill-defined lucent regions of the lung measuring < 950 HU

UIP associated with CTD (109)

UIP pattern with superimposed ground glass or consolidation

Pulmonary artery hypertension (34)

Pulmonary artery greater than 33 mm in transverse dimension or PA/aorta ratio > 1

Organizing pneumonia (79)

Round opacities in a peripheral or bronchovascular distribution

Pulmonary edema (25)

Smooth interlobular septal thickening and ground glass with effusion

Lymphocytic interstitial pneumonitis (39)

Lower lobe cysts in a bronchovascular distribution

Effusion (13)

Radiation (24)

Fibrosis with well-defined margins on sagittal view

Round atelectasis (4)

Round opacity next to a pleural abnormality

Pleural parenchymal fibroelastosis (20)

Excessive apical pleural thickening with air bronchograms that extends along lateral pleura

Pulmonary alveolar proteinosis (4)

Crazy paving pattern

Cystic fibrosis (17)

Upper lung predominant cystic and or varicoid type bronchiectasis

Lymphangitic (4)

Nodular thickening of the interlobular septa in a patient with known cancer

Desquamative interstitial pneumonitis (17)

Homogeneous lower lobe ground-glass opacities with emphysematous type changes

Blood (2)

Ground glass opacity with appropriate clinical history

Respiratory bronchiolitis ILD (16)

Upper lung centrilobular nodules

Amyloid (2)

Coarse Calcified and non-calcified pulmonary nodules

Other (58)

Osteophyte induced fibrosis (15), Vasculitis (9), Unclassifiable (8), Asbestosis (8), Drug reaction (5), Lupus (5), Lymphangioleiomyomatosis (4), Langerhan’s cell histiocytosis (2), Sickle cell disease (2)