The Art of Radiology

DIFFUSE LUNG OPACITIES (DLO)

Inspiration and Expiration

Inspiration Expiration

Supine & Prone

Supine

Anatomy of the secondary pulmonary lobule

secondary pulmonary lobule

Secondary pulmonary lobular anatomy .

HRCT findings in patients with diffuse lung disease.

Nodules on HRCT: distribution within the secondary pulmonary lobule

Centrilobular nodules: Mycobacterium avium –complex infection

HRCT Patterns

Nodular Pattern

CENTRILOBULAR NODULES

CENTRILOBULAR NODULES

PERILYMPHATIC NODULES

PERILYMPHATIC NODULES

RANDOMLY DISTRIBUTED NODULES

RANDOMLY DISTRIBUTED NODULES

Tree in-Bud

TREE-IN-BUD

GROUND-GLASS OPACITY

HONEYCOMBING

Diffuse Lung Diseases

Nodular pattern

Nodular pattern

Tree-in-bud

Random distribution

Ground-glass opacity

Mosaic attenuation

Crazy Paving

Acute consolidation

Chronic consolidation

Low Attenuation patternair-filled lesions

Emphysema

Cystic lung disease

Honeycombing is defined by the presence of small cystic spaces

with thick irregular walls composed of fibrous tissue.

Distribution within the lung

Additional findings

Top 10

Sarcoidosis

Sarcoidosis

Sarcoidosis

Sarcoidosis

Langerhans histiocytosis

Lymphatic VS

Idiopathic Pulmonary fibrosis

Idiopathic Pulmonary fibrosis

Idiopathic Pulmonary fibrosis

Lymphangitis carcinomatosis

Lymphangitis carcinomatosis

Lymphangitis carcinomatosis

Edema

Edema

Asbestosis

Asbestosis

Scleroderma

Rheumatoid arthritis

Systemic Lupus Erythematosus

Silicosis

Hypersensitivity pneumonitis

Hypersensitivity pneumonitis

Hypersensitivity pneumonitis

Emphysema

Emphysema

Centrilobular Emphysema

Emphysematous Bulla

Types of emphysema

Diffuse pulmonary hemorrhage

Bronchoalveolar carcinoma

Alveolar proteinosis

Miliary TB

Pulmonary Histeocytosis X

Lymphangioleiomyomatosis (Rare)

EmphysemaPlain film findings

EmphysemaCentrilobular and paraseptal types

Cystic bronchiectasis

Reticular pattern Interstitial lung disease

Acute DLO

AIRWAYS DISEASE

AIRWAYS DISEASE

AIRWAYS DISEASE

PARENCHYMAL LUNG DISEASE

PARENCHYMAL LUNG DISEASE

PARENCHYMAL LUNG DISEASE

DLO associated with multisystem illness

Fibrosis

Fibrosis

Fibrosis

Fibrosis

Fibrosis

Silicosis & Coal-miner pneumoconiosis

Simple

Complicated

Silicosis Coal-m. pn.coniosis

Asbestosis

Asbestosis (Cont.)

Asbestosis (Cont.)

Sarcoidosis (Cont.)

Sarcoidosis (Cont.)

Sarcoidosis (Cont.)

Sarcoidosis (Cont.)

Fibrosing Alveolitis

Fibrosing Alveolitis (Cont.)

Fibrosing Alveolitis (Cont.)

Fibrosing Alveolitis (Cont.)

Fibrosing Alveolitis (Cont.)

Extrinsic Allergic Alveolitis

Chronic Eosinophilic Pneumonia

Eosinophilic Granuloma (Histeocytosis)

Eosinophilic Granuloma (Histeocytosis-X)

Wegener’s Granulomatosis ( Cont.)

Collagen Diseases

Systemic Lupus Erythematosis

Systemic Sclerosis

Rheumatoid Arthritis (Cont.)

Ankylosing Spondylitis

Amyloidosis