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Here are the most common examples of these four patterns on a chest x-ray (click image
patterns on a chest ... opacities - Fine Nodular ... Masses Atelectasis #Diagnosis ... #Clinical #Radiology ... #Patterns #RadiologyAssistant
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
Sarcoidosis end-stage: consolidation ... COP. ... #Clinical #Radiology ... #HRCT #CTChest ... Comparison #Table #RadiologyAssistant
HRCT findings in OP
- Bilateral peripheral consolidations, sharply demarcated.
- Consolidations may be migratory.
- Lesions may show
HRCT findings in ... carcinoma, the diagnosis ... #Clinical #Radiology ... #CTChest #COP # ... Pneumonia #ILD #RadiologyAssistant
Perilymphatic distribution
Perilymphatic nodules are most commonly seen in sarcoidosis.
They also occur in silicosis, coal-worker's pneumoconiosis and
in differential diagnosis ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... #CTChest #Perilymphatic ... #RadiologyAssistant
On the left two cases with chronic consolidation. 
There are patchy non-segmental consolidations in a subpleural
The final diagnosis ... pneumonia the HRCT ... this #Clinical #Radiology ... #CTChest #COP # ... OrganizingPneumonia #RadiologyAssistant
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
Algorithm for nodular ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... #CTChest #NodularPattern ... Differential #Algorithm #RadiologyAssistant
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
irregular lines, nodular ... , cavities • HRCT ... : patchy consolidation ... pulmonary #ILD #diagnosis ... #management
Based on the images alone, it is usually not possible to determine the cause of the
between these chest ... in fact this is nodular ... #Clinical #Diagnosis ... #Radiology #CXR ... #Causes #RadiologyAssistant
It is very important to differentiate between acute consolidation and chronic consolidation, because it will limit
the differential diagnosis ... organizing pneumonia (OP ... granulomatous noduli ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant
Basic Interpretation
A structured approach to interpretation of HRCT involves the following questions:
What is the dominant HR-pattern:
reticular
nodular
high
HR-pattern: reticular nodular ... (ground-glass, consolidation ... bronchiectasis) #Diagnosis ... #Radiology #Pulmonary ... #HRCT #CTChest