29 results
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
These include: - Emphysema ... - Lung cysts (LAM ... Radiology #Pulmonary #CTChest ... TractionBronchiectasis #Cysts #Emphysema ... #SignetRing #RadiologyAssistant
Empyema Necessitans (EN) on Chest POCUS

Pulmonary teaching case: you are called to the bedside of a
Empyema Necessitans ... (EN) on Chest POCUS ... This is Empyema ... Because Empyema ... @nickmmark #Empyema
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Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Centrilobular emphysema ... low attenuation areas ... Radiology #HRCT #CTChest ... Pattern #Comparison #Table ... #RadiologyAssistant
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Centrilobular emphysema ... low attenuation areas ... Radiology #HRCT #CTChest ... Pattern #Comparison #Table ... #RadiologyAssistant
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
Upper lung zone ... (centrilobular emphysema ... #Differential #Table ... #Upper #Lower #RadiologyAssistant
Radiologists use many terms to describe areas of decreased density or lucencies within the lung, like
terms to describe areas ... pneumatocele, emphysema ... we describe a chest ... with a thin wall Emphysema ... #Differential #Table
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
Chronic eosinophilic pneumonia ... Chronic eosinophilic pneumonia ... Radiology #HRCT #CTChest ... Pattern #Comparison #Table ... #RadiologyAssistant
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Centrilobular emphysema ... Diagnosis #Radiology #CTChest ... Differential #Comparison #Table ... #RadiologyAssistant
On the left a typical case of panlobular emphysema.
There is uniform destruction of the underlying architecture
of panlobular emphysema ... Panlobular emphysema ... severe panlobular emphysema ... severe panlobular emphysema ... #Panlobular #Emphysema
Centrilobular emphysema due to smoking. The periphery of the lung is spared (blue arrows). Centrilobular artery
Centrilobular emphysema ... periphery of the lung ... Clinical #Radiology #CTChest ... Centrilobular #Emphysema ... CentrilobularEmphysema #RadiologyAssistant