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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
The fourth pattern ... Lung cysts (LAM, LIP ... low attenuation pattern ... #Pulmonary #CTChest ... #Diagram #Comparison
Subacute hypersensitivity pneumonitis
The key findings in the subacute hypersensitivity pneumonitis are:
ill-defined centrilobular nodules of ground-glass opacity
key findings in ... ) or mosaic pattern ... #Clinical #Radiology ... #CTChest #Hypersensitivity ... #Pneumonitis #HypersensitivityPneumonitis
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
UIP with honeycombing ... Pneumonitis. ... Chronic stage: - UIP ... Clinical #Diagnosis #Radiology ... #CTChest #UIP #
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
seen and in many cases ... UIP can be suspected ... #Diagnosis #Radiology ... #Pulmonary #CXR ... RadiologyAssistant
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
have specific patterns ... realise, that these patterns ... of NSIP, UIP, OP ... #Pulmonary #CTChest ... #Findings #RadiologyAssistant
Chronic hypersensitivity pneumonitis (2)
The case on the left shows an inspiratory and expiratory scan: the mosaic
The case on the ... scan: the mosaic pattern ... with a mozaic pattern ... #Clinical #Radiology ... #Pneumonitis #HypersensitivityPneumonitis
On the left a smoker with RB-ILD with subtle HRCT-findings.
The dominant pattern is ground glass opacification.
Additional
The dominant pattern ... are paraseptal emphysema ... pneumonitis, but ... #Clinical #Radiology ... #CTChest #RBILD