1116 results
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
The fourth pattern ... decreased lung attenuation ... diseases with a low attenuation ... pattern can be ... Radiology #Pulmonary #CTChest
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Low Attenuation ... pattern 1. ... emphysema: low attenuation ... Radiology #HRCT #CTChest ... LowAttenuation #Cystic #Pattern
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Low Attenuation ... pattern (2) 1. ... emphysema: low attenuation ... Radiology #HRCT #CTChest ... LowAttenuation #Cystic #Pattern
Chronic hypersensitivity pneumonitis
The key findings in chronic hypersensitivity pneumonitis are:
Mosaic pattern with areas of ground-glass atenuation
pneumonitis are: Mosaic pattern ... and areas of low attenuation ... shows a mosaic pattern ... nodules of increased attenuation ... Radiology #CXR #CTChest
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
High Attenuation ... pattern (2) 1. ... Radiology #HRCT #CTChest ... HighAttenuation #Pattern
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
High Attenuation ... pattern 1. ... Radiology #HRCT #CTChest ... HighAttenuation #Pattern
Honeycombing represents the second reticular pattern recognizable on HRCT.
Because of the cystic appearance, honeycombing is also
second reticular pattern ... discussing the low attenuation ... pattern. ... 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
the dominant HR-pattern ... reticular nodular high attenuation ... consolidation) low attenuation ... Pulmonary #HRCT #CTChest
Chronic hypersensitivity pneumonitis (2)
The case on the left shows an inspiratory and expiratory scan: the mosaic
scan: the mosaic pattern ... of ground-glass attenuation ... and areas of low attenuation ... with a mozaic pattern ... Clinical #Radiology #CTChest
Reticular pattern 
1. Lymphangitic carcinomatosis: irregular septal thickening, usually focal or unilateral 50% adenopathy', known carcinoma.
2.
Reticular pattern ... : ground glass attenuation ... Radiology #HRCT #CTChest ... #Reticular #Pattern