68 results
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
result in decreased lung ... - Lung cysts (LAM ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... #SignetRing #RadiologyAssistant
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Centrilobular emphysema ... #Clinical #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 ... #Clinical #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 ... Pulmonary edema #Diagnosis ... #Differential #Table ... #Upper #Lower #RadiologyAssistant
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Centrilobular emphysema ... central dot. - LIP #Clinical ... #CTChest #Cystic ... Differential #Comparison #Table ... #RadiologyAssistant
Radiologists use many terms to describe areas of decreased density or lucencies within the lung, like
pneumatocele, emphysema ... we describe a chest ... with a thin wall Emphysema ... #Differential #Table ... #Pulmonary #Diagnosis
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
with peripheral areas ... consolidation #Clinical ... Radiology #HRCT #CTChest ... Pattern #Comparison #Table ... #RadiologyAssistant
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 ... #RadiologyAssistant
On the left three different patients with lung cysts.
From left to right: Lymphangiomyomatosis, LIP and Langerhans
patients with lung ... #Clinical #Diagnosis ... #Radiology #CTChest ... Histiocytosis #RadiologyAssistant
On the left a typical case of panlobular emphysema.
There is uniform destruction of the underlying architecture
to widespread areas ... in the affected lung ... #Clinical #Radiology ... #CTChest #Panlobular ... #RadiologyAssistant