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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
cysts (LAM, LIP ... diseases with a ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... Differential #Diagram #Comparison
There is a hydropneumothorax.
Notice the air-fluid level (blue arrow).
The upper lobe is still attached to the
There is a lung ... LAM is a rare lung ... airways leading to pulmonary ... #Clinical #Radiology ... #CXR #Pneumothorax
Radiologists use many terms to describe areas of decreased density or lucencies within the lung, like
, like cyst, cavity ... thick wall Cyst ... visible wall #CXR ... #Lung #Pulmonary ... #Diagnosis #Radiology
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
in interstitial lung ... is interstitial lung ... On a CXR the most ... #Diagnosis #Radiology ... #Pulmonary #CXR
Noncardiogenic Pulmonary Edema - Differential Diagnosis Framework

NCPE Pathophysiology:
Noncardiogenic pulmonary edema occurs because of excessive pulmonary capillary
Physical/Labs: • A ... ischemic changes CXR ... pulmonary edema ... Transfusion-related acute lung ... #diagnosis #cardiology
Batwing
A bilateral perihilar distribution of consolidation is also called a Batwing distribution.
The sparing of the periphery
periphery of the lung ... most typical of pulmonary ... edema, both cardiogenic ... #Diagnosis #Radiology ... #CXR #Batwing #
Stage I - Redistribution
In a normal chest film with the patient standing erect, the pulmonary vessels
supplying the lung ... In these cases comparison ... period of CHF (right ... #Clinical #Radiology ... #CXR #CHF #Cephalization
ARDS/VALI progression over the course of 1 week 
 (a) Day 1 - No pathological findings.
course of 1 week (a) ... involvement, with “white lung ... oedema due to heart ... #Clinical #Radiology ... #CXR #ChestXRay
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
consolidation as a ... the surrounding lung ... associated pulmonary ... Clinical #Diagnosis #Radiology ... #Emphysema #Comparison
On the left a patient with CHF. 
There is an increase in heart size compared to
On the left a patient ... redistribution of pulmonary ... , interstitial edema ... #Clinical #Radiology ... #CXR #CHF #Exacerbation