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Mosaic attenuation
The term 'mosaic attenuation' is used to describe density differences between affected and non-affected lung
Mosaic attenuation ... process adjacent to normal ... lung - Normal lung ... Diagnosis #Radiology #Pulmonary ... #Differential #RadiologyAssistant
On the left a patient with ground glass pattern in a mosaic distribution.
The clue here is
glass pattern in a mosaic ... clue here is the enlargement ... of pulmonary arteries ... #CTChest #GGO #Mosaic ... Thromboembolism #RadiologyAssistant
On a chest film only the outer contours of the heart are seen.
In many cases we
heart figure is normal ... blood from the pulmonary ... just below the pulmonary ... trunk. - Enlargement ... Cardiac #Chambers #RadiologyAssistant
Differential diagnosis of Lymphangitic Carcinomatosis. 
On the left multiple diseases showing septal thickening:
1. Lymphangitic carcinomatosis: irregular
Cardiogenic pulmonary ... secondary lobules with normal ... Cardiogenic pulmonary ... #Differential #Comparison ... #Table #RadiologyAssistant
Stage I - Redistribution
In a normal chest film with the patient standing erect, the pulmonary vessels
Redistribution In a normal ... standing erect, the pulmonary ... The pulmonary vascular ... In these cases comparison ... Redistribution #RadiologyAssistant
Previous normal chest x-ray (left) and CHF stage II with perihilar haze (right). On the left
Previous normal ... diameter of the pulmonary ... CHF #Vascular #Engorgement ... #Thickening #RadiologyAssistant
It can be difficult to distinguish these three entities.
There are two diagnostic hints for further differentiation:
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black' lung is abnormal ... right with the pulmonary ... MosaicAttenuation #Mosaic ... #Attenuation #Comparison ... #RadiologyAssistant
There are three principal varieties of pulmonary edema: cardiac, overhydration and increased capillary permeability (ARDS). 
The
principal varieties of pulmonary ... different forms of pulmonary ... edema (6): - Normal ... Pedicle #Width #Comparison ... VascularPedicleWidth #RadiologyAssistant
Artery-to-bronchus ratio 
Normally the vessels in the upper lobes are smaller than the accompanying bronchus with
Artery-to-bronchus ratio Normally ... redistribution of pulmonary ... diameter > 3 mm (normal ... CHF #Vascular #Engorgement ... #RadiologyAssistant