Ct scan of chest Chronic diseases
Plain Film and CT Opacities
Plain Film and CT Opacities
• Nodules
• Reticulation and Lines
• Ground glass [Shah and Miller AJR 2003]
– DIP, NSIP, AIP, DAD (32%)
– Fibrosis
• Consolidation
• Cystic airspaces
- Nodules
- Reticulation and Lines
- Ground glass
- Consolidation
- Cystic airspaces
Plain Film and CT Opacities
• Nodules
- Sarcoid
- Silicosis, coal-workers
- Hypersensitivity Pneumonitis
- Metastasis
• Reticulation and Lines
- Fibrosis
- IPF-lower, subpleural
- Asbestosis-lower, subpleural
- Sarcoidosis-peribronchovascular
- Chronic hypersensitivity pneumonitis-mid and
- upper lung zone
• Ground glass [Shah and Miller AJR 2003]
- Non-specific
- Airspace, interstitial, combined
– DIP, NSIP, AIP, DAD (32%)
- Infection (32%)
- Drug toxicity (11%)
- Hemorrhage (3%)
- Ground glass with reticulation
– Fibrosis
• Consolidation
- Organizing Pneumonia (BOOP)
- Chronic eosinophilic pneumonia
- Lymphoma
- Bronchoalveolar cell carcinoma
- Infection
- Hemorrhage
• Cystic airspaces
- Mimics reticulation on plain radiographs
- Fibrosis and honeycombing
- PF-Lower, subpleural
- LAM-Diffuse
- LCH-Upper
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