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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
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The fourth pattern ... attenuation or ... - Emphysema - Lung ... #Diagnosis #Radiology ... Emphysema #SignetRing #RadiologyAssistant
Mosaic attenuation
The term 'mosaic attenuation' is used to describe density differences between affected and non-affected lung
Mosaic attenuation ... The term 'mosaic ... thromboembolic disease #Diagnosis ... #Radiology #Pulmonary ... #RadiologyAssistant
On the left a patient with ground glass pattern in a mosaic distribution.
The clue here is
with ground glass pattern ... hyperperfused lung ... #Clinical #Radiology ... #CTChest #GGO # ... #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... in interstitial lung ... , high and low attenuation ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant
On the left another patient with ground glass pattern in a mosaic distribution.
Again the ground glass
with ground glass pattern ... hyperperfused lung ... #Clinical #Radiology ... #CTChest #GGO # ... #RadiologyAssistant
Chronic hypersensitivity pneumonitis (2)
The case on the left shows an inspiratory and expiratory scan: the mosaic
pattern with areas ... mid and lower lung ... pattern should ... #Clinical #Radiology ... HypersensitivityPneumonitis #Fibrosis #RadiologyAssistant
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
or interstitial lung ... in ground glass pattern ... bronchiolitis #Diagnosis ... #Radiology #Pulmonary ... #Differential #RadiologyAssistant
On the left a patient with ground glass pattern in a mosaic distribution.
Some lobules are involved
with ground glass pattern ... The differential diagnosis ... #Clinical #Radiology ... #CTChest #GGO # ... HypersenstitivityPneumonitis #RadiologyAssistant
It can be difficult to distinguish these three entities.
There are two diagnostic hints for further differentiation:
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There are two diagnostic ... penicillamine) #Clinical #Radiology ... MosaicAttenuation #Mosaic ... #Attenuation #Comparison ... #RadiologyAssistant