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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
result in decreased lung ... - Emphysema - Lung ... Diagnosis #Radiology #Pulmonary ... #CTChest #LowAttenuation ... Emphysema #SignetRing #RadiologyAssistant
Chronic hypersensitivity pneumonitis
The key findings in chronic hypersensitivity pneumonitis are:
Mosaic pattern with areas of ground-glass atenuation
hypersensitivity pneumonitis are ... Radiology #CXR #CTChest ... #Pneumonitis #HypersensitivityPneumonitis ... Chronic #Fibrosis #RadiologyAssistant
Here another case of hypersensitivity pneumonitis.
There is a mosaic pattern.
Some secundary lobules demonstrate ground-glass opacity due
opacity due to lung ... , while others are ... Clinical #Radiology #CTChest ... #Pneumonitis #HypersensitivityPneumonitis ... #GroundGlass #RadiologyAssistant
Sometimes the centrilobular opacities are more nodular in appearance as in this case. #Clinical #Radiology #CTChest
centrilobular opacities are ... Clinical #Radiology #CTChest ... #Pneumonitis #HypersensitivityPneumonitis ... Centrilobular #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 ... Pathophys #Radiology #Pulmonary ... #CTChest #TreeInBud ... #Diagram #RadiologyAssistant
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
gradient to normal age ... Weakness, Loss of Chest ... Elasticity (flail chest ... Embolism, Obstructive Lung ... , Interstitial Lung
Stage I - Redistribution
In a normal chest film with the patient standing erect, the pulmonary vessels
supplying the upper lung ... fields are smaller ... supplying the lung ... The pulmonary vascular ... Redistribution #RadiologyAssistant
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
responses of the lung ... these patterns are ... Diagnosis #Radiology #Pulmonary ... #CTChest #Idiopathic ... ILD #Findings #RadiologyAssistant
Septic emboli
Septic emboli usually present as multiple ill-defined nodules.
In about 50% cavitation is seen.
CT demonstrates more
densities iin the left lung ... , which are probably ... cavitation in the right lung ... Radiology #CXR #CTChest ... SepticEmboli #Cavity #RadiologyAssistant
Hyperacute Hypoxemia - Workup and Management
Differential Diagnosis: Aspiration, Flash Pulmonary Edema, Mucous Plugging, Bronchospasm, Pulmonary Embolism,
Bronchospasm, Pulmonary ... (JVP, edema), Lung ... POCUS (B-lines, lung ... STAT CXR, CTA Chest ... Management #treatment #criticalcare