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Diagnostic algorithm for idiopathic pulmonary fibrosis, in part adapted from the ATS/ERS consensus statement. HRCT =
Diagnostic algorithm ... for idiopathic pulmonary ... HRCT = high-resolution ... IPF = idiopathic pulmonary ... #IPF #UIP #Algorithm
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
disease comes from HRCT ... On HRCT there are ... On a Chest X-Ray ... The ground-glass ... Diagnosis #Radiology #Pulmonary
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
areas of ground glass ... areas of ground glass ... Clinical #Radiology #HRCT ... #CTChest #HighAttenuation
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
Ground-glass opacity ... Ground-glass opacity ... resolution of the HRCT ... Diagnosis #Radiology #Pulmonary ... #CTChest #GGO #
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
on the basis of HRCT ... Diagnosis #Radiology #Pulmonary ... #CTChest #LowAttenuation
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
Algorithm for nodular ... pattern The algorithm ... Diagnosis #Radiology #Pulmonary ... #HRCT #CTChest ... #Differential #Algorithm
Figure 3 HRCT-LUS correlation in normal lung, pulmonary congestion, rheumatoid lung disease, idiopathic pulmonary fibrosis.
Notes: (A)
Figure 3 HRCT-LUS ... in normal lung, pulmonary ... disease, idiopathic pulmonary ... extensive ground glass ... Clinical #Diagnosis #HRCT
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
(NSIP): ground glass ... Clinical #Radiology #HRCT ... #CTChest #HighAttenuation
Perilymphatic distribution
Perilymphatic nodules are most commonly seen in sarcoidosis.
They also occur in silicosis, coal-worker's pneumoconiosis and
Diagnosis #Radiology #Pulmonary ... #HRCT #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 ... attenuation (ground-glass ... Diagnosis #Radiology #Pulmonary ... #HRCT #CTChest ... Interpretation #Algorithm