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Here are the most common examples of these four patterns on a chest x-ray (click image
of these four patterns ... mass - Solitary Pulmonary ... Atelectasis #Diagnosis #Clinical ... #Radiology #CXR ... #RadiologyAssistant
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
with a nodular pattern ... #Clinical #Diagnosis ... #Radiology #Pulmonary ... CTChest #Nodular #Pattern ... Comparison #Table #RadiologyAssistant
Septic emboli
Septic emboli usually present as multiple ill-defined nodules.
In about 50% cavitation is seen.
CT demonstrates more
CT demonstrates ... feeding vessel sign ... feeding vessel sign ... #Clinical #Radiology ... SepticEmboli #Cavity #RadiologyAssistant
Tree-in-Bud Sign on Chest CT
 • Multiple centrilobular nodules arranged in a linear branching pattern.
 •
Tree-in-Bud Sign ... linear branching pattern ... #CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical #tree
Tram Track Sign on Chest CT
 • Parallel, non-tapering airways, extending to the lung periphery.
 •
Tram Track Sign ... bronchiectasis, CF, ILD ... #CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
Air Bronchogram Sign on Chest CT
 • Patent airways surrounded by opacified lung
 • DDx: pna,
on Chest CT • ... edema, severe ILD ... #CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
On the left a patient with DIP.
The HRCT shows diffuse areas of ground-glass density in the
and some mosaic pattern ... abnormalities and signs ... cessation of smoking #Clinical ... #Radiology #CTChest ... #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 ... bronchiectasis) #Diagnosis #Radiology ... #Pulmonary #HRCT ... Interpretation #Algorithm ... #ILD #RadiologyAssistant
On the left a smoker with RB-ILD with subtle HRCT-findings.
The dominant pattern is ground glass opacification.
Additional
The dominant pattern ... these non-specific CT ... and additional clinical ... #Clinical #Radiology ... #RadiologyAssistant
When a rib fracture heals, the callus formation may create a mass-like appearance (blue arrow).
Sometimes a
Sometimes a CT is ... and the enlarged pulmonary ... #Clinical #Radiology ... #CXR #Old #RibFracture ... #Pseudotumor #RadiologyAssistant