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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 ... attenuation or air-filled ... - Emphysema - Lung ... Diagnosis #Radiology #Pulmonary ... Emphysema #SignetRing #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 ... airways leading to pulmonary ... Lymphangioleiomyomatosis #LAM #RadiologyAssistant
Mosaic attenuation
The term 'mosaic attenuation' is used to describe density differences between affected and non-affected lung
and non-affected lung ... black and white lung ... with air-trapping ... Diagnosis #Radiology #Pulmonary ... #Differential #RadiologyAssistant
It can be difficult to distinguish these three entities.
There are two diagnostic hints for further differentiation:
-
expiratory scans for air ... bronchiolitis or chronic pulmonary ... right with the pulmonary ... bronchiolitis with air ... Attenuation #Comparison #RadiologyAssistant
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
the result of air ... or interstitial lung ... Diagnosis #Radiology #Pulmonary ... #Differential #RadiologyAssistant
There is a hydropneumothorax.
Notice the air-fluid level.
The upper lobe is still attached to the chest wall
Notice the air-fluid ... There is a lung ... with a cystic lung ... airways leading to pulmonary ... Lymphangioleiomyomatosis #LAM #RadiologyAssistant
Bronchiectasis is defined as localized bronchial dilatation.
The diagnosis of bronchiectasis is usually based on a combination
the peripheral lung ... and sometimes air ... Diagnosis #Radiology #Pulmonary ... #Differential #RadiologyAssistant
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
the surrounding lung ... without associated pulmonary ... usually contain air ... Emphysema #Comparison #RadiologyAssistant
Stage III - Alveolar edema
This stage is characterized by continued fluid leakage into the interstitium, which
position Obstructive lung ... diseased areas of the lung ... consolidations and air ... CHF #Alveolar #Pulmonary ... AlveolarEdema #RadiologyAssistant
Lung Ultrasound: Cardiogenic Pulmonary Edema vs ARDS
Cardiogenic Pulmonary Edema:
 • Smooth pleural line
 • AIS >
Cardiogenic Pulmonary ... ARDS Cardiogenic Pulmonary ... pleural line • AIS ... Non-cardiogenic pulmonary ... consolidations & air