Acute Interestitial markings
- infection
- oedema : peripheral septal lines, upper vessel diversion, cardiomegaly, pleural effusion
- haemorrhage
- lymphangitis carcinomatosis
Chronic interstitial markings
- upper : sarcoid, silicosis, pneumoconiosis, HP, ankylosing spondylitis, radiation, TB
- lower: interestial lung disease (idiopathic, drugs, connective disease, asbestosis)
Unilateral pulmonary oedema cause
- positioning
- mitral valve rupture
- re-expansion pulmonary oedema
Reticulonodular opacity
- acute: TB, fungal, atypical oedema, HP
- chronic: sarcoid, silicosis/pneumoconiosis, metastasis, Langerhan cell histiocytosis