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Diagnostic algorithm for idiopathic pulmonary fibrosis, in part adapted from the ATS/ERS consensus statement. HRCT =
idiopathic pulmonary fibrosis ... HRCT = high-resolution ... idiopathic pulmonary fibrosis ... ; UIP = usual interstitial ... pneumonitis #IPF #UIP
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis on HRCT ... about imaging findings ... disease comes from HRCT ... On HRCT there are ... in many cases UIP
Figure 3 HRCT-LUS correlation in normal lung, pulmonary congestion, rheumatoid lung disease, idiopathic pulmonary fibrosis.
Notes: (A)
Figure 3 HRCT-LUS ... idiopathic pulmonary fibrosis ... artifact); (G) UIP ... Clinical #Diagnosis #HRCT ... Correlation #Table #ILD #Findings
Sarcoidosis
In this case the chest x-ray shows subtle findings that could be described as fine reticulation.
In
x-ray shows subtle findings ... In many cases a HRCT ... nature of the findings ... The HRCT - not shown ... Clinical #Radiology #CXR
Chronic hypersensitivity pneumonitis
The key findings in chronic hypersensitivity pneumonitis are:
Mosaic pattern with areas of ground-glass atenuation
pneumonitis The key findings ... Fibrosis and parenchymal ... The HRCT shows a ... existing irreversible fibrosis ... Clinical #Radiology #CXR
UIP
UIP is a histologic pattern of pulmonary fibrosis.
On a chest X-ray UIP manifests as a reticular
pattern of pulmonary fibrosis ... on the CXR. ... A HRCT is needed ... Here a CXR with ... HRCT demonstrated
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
Lung cysts (LAM, LIP ... on the basis of HRCT ... findings. ... Differential #Diagram #Comparison
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
combinations of fibrosis ... of morphologic findings ... on HRCT and histology ... of NSIP, UIP, OP ... and LIP have been
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
show very similar HRCT ... findings ... In chronic HP fibrotic ... #Comparison #Chronic ... HypersensitivityPneumonitis #Fibrosis
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
result of massive fibrosis ... Clinical #Radiology #HRCT ... HighAttenuation #Pattern #Comparison