9 results
Chronic hypersensitivity pneumonitis
The key findings in chronic hypersensitivity pneumonitis are:
Mosaic pattern with areas of ground-glass atenuation
Mosaic pattern with areas ... and areas of low ... attenuation. ... The HRCT shows a ... Radiology #CXR #CTChest
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
High Attenuation ... with peripheral areas ... presenting as areas ... Clinical #Radiology #HRCT ... #CTChest #HighAttenuation
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Low Attenuation ... emphysema: low attenuation ... areas without walls ... Clinical #Radiology #HRCT ... #CTChest #LowAttenuation
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Low Attenuation ... emphysema: low attenuation ... areas without walls ... Clinical #Radiology #HRCT ... #CTChest #LowAttenuation
This patient presented with acute dyspnoe and a normal chest film (not shown).
The HRCT at presentation
The HRCT at presentation ... shows lobular areas ... of ground glass attenuation ... A control HRCT ten ... Clinical #Radiology #CTChest
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 ... Diagnosis #Radiology #Pulmonary ... #HRCT #CTChest ... Interpretation #Algorithm
Head Cheese Sign on Chest CT
 • Juxtaposition of distinct radiographic areas of low, normal and
Cheese Sign on Chest ... distinct radiographic areas ... normal and high attenuation ... doi.org/10.1016/j.chest ... Sign #CT #Lung #Pulmonary
Mosaic attenuation
The term 'mosaic attenuation' is used to describe density differences between affected and non-affected lung
Mosaic attenuation ... non-affected lung areas ... There are patchy areas ... Diagnosis #Radiology #Pulmonary ... #CTChest #MosaicAttenuation
On the left a typical case of panlobular emphysema.
There is uniform destruction of the underlying architecture
to widespread areas ... abnormally low attenuation ... Pulmonary vessels ... difficult to detect on HRCT ... Clinical #Radiology #CTChest