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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
- Lung cysts (LAM ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... LowAttenuation #Differential ... #Diagram #Comparison
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
the surrounding lung ... without associated pulmonary ... emphysema. ... #Clinical #Diagnosis ... #Comparison #RadiologyAssistant
Miliary Pattern - Chest Radiology
 • Miliary opacities are scattered, small (1 -4 mm) nodules
 •
throughout the lungs ... #differential # ... diagnosis #pulmonary ... #CXR #clinical ... #CT
Incidental Finding of Oleothorax - A chest radiograph showed a dense opacity in the upper area
The differential ... old calcified empyema ... treatment for pulmonary ... #Clinical #PCC # ... Oleothorax #NEJM
Split Pleura Sign on Chest CT
 • Contrast enhancement of the parietal and visceral pleura, separated
Sign on Chest CT ... effusion • DDx: Empyema ... #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
When a rib fracture heals, the callus formation may create a mass-like appearance (blue arrow).
Sometimes a
Sometimes a CT is ... necessary to differentiate ... fracture from a lung ... Notice the large lung ... #Clinical #Radiology
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
chronic HP (right) Differential ... centrilobular emphysema ... throughout the whole lung ... #Clinical #Diagnosis ... #UIP #Comparison
Disseminated Actinomycosis- ...Computed tomography of the chest and abdomen revealed multiple pulmonary nodules (Panel A) associated
revealed multiple pulmonary ... effusions in both lungs ... Biopsy of the lung ... #NEJM #clinical ... #radiology #CT #
On the left a smoker with RB-ILD with subtle HRCT-findings.
The dominant pattern is ground glass opacification.
Additional
are paraseptal emphysema ... these non-specific CT ... there is a broad differential ... and additional clinical ... #Clinical #Radiology