12 results
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
The fourth pattern ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... Differential #Diagram #Comparison ... #SignetRing #RadiologyAssistant
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Centrilobular emphysema ... low attenuation areas ... #Clinical #Radiology ... #Comparison #Table ... #RadiologyAssistant
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Centrilobular emphysema ... low attenuation areas ... #Clinical #Radiology ... #Comparison #Table ... #RadiologyAssistant
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
High Attenuation pattern ... consolidation #Clinical ... #Radiology #HRCT ... #Comparison #Table ... #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 ... #Differential #Comparison ... #Table #RadiologyAssistant
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
without associated pulmonary ... emphysema. ... #Clinical #Diagnosis ... #Radiology #CTChest ... #Comparison #RadiologyAssistant
On the left a typical case of panlobular emphysema.
There is uniform destruction of the underlying architecture
the secondary pulmonary ... to widespread areas ... Pulmonary vessels ... #Clinical #Radiology ... PanlobularEmphysema #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 ... low attenuation (emphysema ... #Pulmonary #HRCT ... Interpretation #Algorithm ... #ILD #RadiologyAssistant
Reticular pattern 
1. Lymphangitic carcinomatosis: irregular septal thickening, usually focal or unilateral 50% adenopathy', known carcinoma.
2.
Reticular pattern ... Cardiogenic pulmonary ... #Clinical #Radiology ... #Comparison #Table ... #RadiologyAssistant
On the left a patient with ground glass pattern in a mosaic distribution.
The clue here is
with ground glass pattern ... enlargement of pulmonary ... (arrow) in the areas ... #Clinical #Radiology ... Thromboembolism #RadiologyAssistant