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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
#Diagnosis #Radiology ... #Pulmonary #CTChest ... #Differential #Diagram ... #Comparison #Honeycombing ... Emphysema #SignetRing #RadiologyAssistant
Pleural effusion is not always visible as a meniscus in the costophrenic angle. 
A subpulmonic effusion
always visible as a meniscus ... On the left images ... #Clinical #Radiology ... #CXR #CHF #Pleural ... SubpulmonicEffusion #RadiologyAssistant
Stage I - Redistribution
In a normal chest film with the patient standing erect, the pulmonary vessels
Stage I - Redistribution ... In these cases comparison ... #Clinical #Radiology ... #CXR #CHF #Cephalization ... Redistribution #RadiologyAssistant
Pleural fluid
It takes about 200-300 ml of fluid before it comes visible on an CXR (figure).
About
Pleural fluid It takes ... visible on an CXR ... #Diagnosis #Radiology ... Hidden #Volume #Diagram ... #RadiologyAssistant
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
early nodular stage ... #Clinical #Diagnosis ... #Radiology #Pulmonary ... #CTChest #Nodular ... #Differential #Comparison
Previous normal chest x-ray (left) and CHF stage II with perihilar haze (right). On the left
Previous normal chest ... stage II with perihilar ... #Clinical #Radiology ... #CXR #Lateral # ... #Thickening #RadiologyAssistant
Pleural effusion is bilateral in 70% of cases of CHF.
When unilateral, it is slightly more often
PA image as a meniscus ... On the left images ... #Clinical #Radiology ... #CXR #CHF #Pleural ... PleuralEffusion #RadiologyAssistant
Increased pulmonary venous pressure is related to the pulmonary capillary wedge pressure (PCWP) and can be
be graded into stages ... features on the chest ... #Diagnosis #Radiology ... #CHF #CXR #Stages ... Findings #Signs #RadiologyAssistant
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
the differential diagnosis ... patients with end-stage ... #Radiology #CTChest ... Cyst #Emphysema #Comparison ... #RadiologyAssistant
Congestive heart failure (CHF) is the result of insufficient output because of cardiac failure, high resistance
can be seen on a chest-film ... #Diagnosis #Radiology ... #CHF #CXR #Features ... #Findings #Diagram ... #RadiologyAssistant