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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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result in decreased lung ... attenuation or air-filled ... - Emphysema - Lung ... Differential #Diagram #Comparison ... Emphysema #SignetRing #RadiologyAssistant
Lung Ultrasound: Cardiogenic Pulmonary Edema vs ARDS
Cardiogenic Pulmonary Edema:
 • Smooth pleural line
 • AIS >
Lung Ultrasound: ... pleural line • AIS ... opacities • AIS ... consolidations & air ... pulmonary #edema #comparison
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On the left three different patients with lung cysts.
From left to right: Lymphangiomyomatosis, LIP and Langerhans
patients with lung ... CTChest #Cystic #Comparison ... Histiocytosis #RadiologyAssistant
Air Bronchograms on Ultrasound

Opacification of alveolar spaces surrounding air-filled bronchioles; enables visualization of well-defined tissue/air interface;
Air Bronchograms ... well-defined tissue/air ... interface; dynamic air ... POCUS #Clinical #Lung ... #Ultrasound #comparison
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Pneumonia on Chest Xray and POCUS

Extensive pneumonia in lower left lobe (red arrow). 
POCUS: Dynamic air
POCUS: Dynamic air ... AirBronchogram #POCUS #CXR #Comparison ... #Clinical #Lung
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Consolidation is synonymous with airspace disease.
When you think of the causes of consolidation, think of 'what
replacing the air ... UIP, NSIP and long ... can replace the air ... #Differential #RadiologyAssistant
There is a hydropneumothorax.
Notice the air-fluid level (blue arrow).
The upper lobe is still attached to the
Notice the air-fluid ... There is a lung ... with a cystic lung ... LAM is a rare lung ... Lymphangioleiomyomatosis #LAM #RadiologyAssistant
Whenever you see an area of increased density within the lung, it must be the result
density within the lung ... tissue of the lung ... a part of the lung ... the amount of air ... Consolidation #Patterns #RadiologyAssistant
Septic emboli
Septic emboli usually present as multiple ill-defined nodules.
In about 50% cavitation is seen.
CT demonstrates more
abutting the pleura, air-bronchograms ... densities iin the left lung ... cavitation in the right lung ... SepticEmboli #Cavity #RadiologyAssistant
Connective tissue disease-associated interstitial lung diseases

LIP: lymphoid interstitial pneumonia. NSIP: nonspecific interstitial pneumonia. OP: organizing pneumonia.
disease-associated interstitial lung ... AIP: acute interstitial ... #Differential #Comparison