12 results
Chronic hypersensitivity pneumonitis
The key findings in chronic hypersensitivity pneumonitis are:
Mosaic pattern with areas of ground-glass atenuation
attenuation. ... The HRCT shows a ... nodules of increased attenuation ... #Clinical #Radiology ... Chronic #Fibrosis #RadiologyAssistant
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Low Attenuation ... areas without walls ... #Clinical #Radiology ... #HRCT #CTChest ... Comparison #Table #RadiologyAssistant
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
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decreased lung attenuation ... on the basis of HRCT ... #Diagnosis #Radiology ... LowAttenuation #Differential ... Emphysema #SignetRing #RadiologyAssistant
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
High Attenuation ... with peripheral areas ... consolidation #Clinical #Radiology ... #HRCT #CTChest ... Comparison #Table #RadiologyAssistant
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Low Attenuation ... areas without walls ... #Clinical #Radiology ... #HRCT #CTChest ... Comparison #Table #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... , high and low attenuation ... #Diagnosis #Radiology ... Interstitial #Pattern #Differential ... #RadiologyAssistant
This patient presented with acute dyspnoe and a normal chest film (not shown).
The HRCT at presentation
shows lobular areas ... of ground glass attenuation ... A control HRCT ten ... #Clinical #Radiology ... HypersensitivityPneumonitis #Resolution #RadiologyAssistant
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 ... consolidation) low attenuation ... #Pulmonary #HRCT ... Interpretation #Algorithm ... #ILD #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 ... MultipleNodules #Nodules #Differential ... #Algorithm #RadiologyAssistant
Mosaic attenuation
The term 'mosaic attenuation' is used to describe density differences between affected and non-affected lung
non-affected lung areas ... There are patchy areas ... disease #Diagnosis #Radiology ... #Differential # ... RadiologyAssistant