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Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
pattern The algorithm ... are visible, the pattern ... HRCT #CTChest #NodularPattern ... #Nodular #Pattern ... #RadiologyAssistant
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
with a nodular pattern ... Miliary TB: random ... CTChest #Nodular #Pattern ... #NodularPattern ... #RadiologyAssistant
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Nodular pattern ... Miliary TB: random ... CTChest #Nodular #Pattern ... #Comparison #Table ... #RadiologyAssistant
The distribution of nodules shown on HRCT is the most important factor in making an accurate
in the nodular pattern ... Random refers to ... Pulmonary #HRCT #NodularPattern ... #Nodular #Pattern ... Comparison #Diagram #RadiologyAssistant
Differential diagnosis
The table summarizes the most common diseases, that present with consolidation.
Chronic diseases are indicated in
diagnosis The table ... to look at the pattern ... more than one pattern ... #Differential #Table ... #RadiologyAssistant
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
listed in the table ... have specific patterns ... realise, that these patterns ... IdiopathicInterstitialPneumonia #ILD ... #Findings #RadiologyAssistant
Basic Interpretation
A structured approach to interpretation of HRCT involves the following questions:
What is the dominant HR-pattern:
reticular
nodular
high
the dominant HR-pattern ... perilymphatic or random ... Interpretation #Algorithm ... #ILD #RadiologyAssistant
Risk factors
Defining high- or low-risk is currently more difficult than it was in the old guideline.
Previously
it was in the old ... exposure to asbestos, radon ... characteristics alone (See Table ... Radiology #Pulmonary #Fleischner ... PulmonaryNodule #Nodule #RadiologyAssistant
Fleischner Society recommendations for follow-up of nodules
Previous chest radiographs should be reviewed to determine if the
Fleischner Society ... lesion has been stable ... with a benign pattern ... Radiology #CTChest #Fleischner ... Pulmonary #Nodules #RadiologyAssistant