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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
attenuation or air-filled ... 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
(mucus or pus-filled ... TreeInBud #Diagram #RadiologyAssistant
Left Atrium
 - The upper posterior border of the heart is formed by the left atrium.
retrosternal space is filled ... Cardiac #Chambers #RadiologyAssistant
Here another case. On the PA-film a mass is seen that fills the aortopulmonary window. Final
mass is seen that fills ... Fullness #SCLC #RadiologyAssistant
There is a large pericardial effusion, which is located posteriorly to the left ventricle (blue arrow).
The
left ventricle id filled ... PericardialEffusion #RadiologyAssistant
Whenever you see an area of increased density within the lung, it must be the result
pathologic process that fills ... Consolidation #Patterns #RadiologyAssistant
Aortopulmonary window
The aortopulmonary window is the interface below the aorta and above the pulmonary trunk and
to a mass that fills ... Hodgkins #Lymphoma #RadiologyAssistant
ABCs of Lung Ultrasound - A-Lines, B-Lines, Consolidation
A-Profile - Air filled lung does not transmit sound
A-Profile - Air filled ... lung (not air-filled ... bronchioles are air filled ... partially fluid filled ... lung (not air-filled
Multifocal
Multifocal consolidations are also described as multifocal ill-defined opacities or densities.
In most cases these are the
very small and fill ... #Differential #RadiologyAssistant
Another view of acanthocytes under darkfield illumination after removal of light filter over field diaphragm

Dr. Jay
removal of light filter ... over field diaphragm