Ct scan of chest Chronic diseases

Plain Film and CT Opacities

  • 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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Chest X Ray Imaging