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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
- Emphysema - Lung ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... #Differential #Diagram ... Emphysema #SignetRing #RadiologyAssistant
Tree-in-bud
In centrilobular nodules the recognition of 'tree-in-bud' is of value for narrowing the differential diagnosis.
Tree-in-bud describes
identified in the lung ... Diagnosis #Pathophys #Radiology ... #Pulmonary #CTChest ... #TreeInBud #Diagram ... #RadiologyAssistant
Consolidation is synonymous with airspace disease.
When you think of the causes of consolidation, think of 'what
or tumor cells (Table ... UIP, NSIP and long ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... #Differential #RadiologyAssistant
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
bronchiolitis: ill ... Clinical #Diagnosis #Radiology ... #Pulmonary #CTChest ... Differential #Comparison #Table ... #RadiologyAssistant
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
responses of the lung ... listed in the table ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... ILD #Findings #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
in interstitial lung ... low attenuation (table ... #Diagnosis #Radiology ... #Pulmonary #CXR ... #Differential #RadiologyAssistant
On a chest film only the outer contours of the heart are seen.
In many cases we
On a chest film ... be difficult to say ... blood from the pulmonary ... #Anatomy #Radiology ... Cardiac #Chambers #RadiologyAssistant
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
the surrounding lung ... without associated pulmonary ... Clinical #Diagnosis #Radiology ... #CTChest #Cavity ... Emphysema #Comparison #RadiologyAssistant
Pulmonary sequestration
This is an uncommon cause of lobar consolidation.
It is a congenital abnormality.
A nonfunctioning part of
nonfunctioning part of the lung ... tree and receives arterial ... #Clinical #Radiology ... #CXR #CtChest # ... PulmonarySequestration #RadiologyAssistant
Septal thickening
Thickening of the lung interstitium by fluid, fibrous tissue, or infiltration by cells results in
Thickening of the lung ... differential diagnosis (Table ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... #Differential #RadiologyAssistant