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Diagnostic algorithm for idiopathic pulmonary fibrosis, in part adapted from the ATS/ERS consensus statement. HRCT =
Diagnostic algorithm ... HRCT = high-resolution ... computerised tomography; ILD ... #Diagnosis #Idiopathic ... #Pulmonary #Fibrosis
Figure 3 HRCT-LUS correlation in normal lung, pulmonary congestion, rheumatoid lung disease, idiopathic pulmonary fibrosis.
Notes: (A)
Figure 3 HRCT-LUS ... #Clinical #Diagnosis ... #HRCT #POCUS #Lung ... Correlation #Table #ILD ... #Findings
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
on HRCT Most of ... disease comes from HRCT ... On HRCT there are ... #Diagnosis #Radiology ... #Pulmonary #CXR
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
Ground-glass opacity (GGO ... resolution of the HRCT ... as seen in fibrosis ... bronchiolitis #Diagnosis ... #Radiology #Pulmonary
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
combinations of fibrosis ... on HRCT and histology ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... IdiopathicInterstitialPneumonia #ILD
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
) Differential diagnosis ... Subacute stage: - RB-ILD ... show very similar HRCT ... findings ... #Radiology #CTChest
Basic Interpretation
A structured approach to interpretation of HRCT involves the following questions:
What is the dominant HR-pattern:
reticular
nodular
high
interpretation of HRCT ... there additional findings ... #Radiology #Pulmonary ... #HRCT #CTChest ... Interpretation #Algorithm
UIP
UIP is a histologic pattern of pulmonary fibrosis.
On a chest X-ray UIP manifests as a reticular
histologic pattern of pulmonary ... fibrosis. ... A HRCT is needed ... HRCT demonstrated ... #Clinical #Radiology
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
- Imaging: • CXR ... , cavities • HRCT ... lower lung zone, GGO ... Organizing Pneumonia - Diagnosis ... #ILD #diagnosis
On the left a smoker with RB-ILD with subtle HRCT-findings.
The dominant pattern is ground glass opacification.
Additional
with subtle HRCT-findings ... broad differential diagnosis ... interpretion of the HRCT ... probably would be pulmonary ... #Clinical #Radiology