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COVID-19 Patterns of Lung Findings on Chest CT
1. Reverse Halo Sign
2. ARDS
3. Crazy-Paving Pattern
4. Bilateral Peripheral
of Lung Findings ... Reverse Halo Sign ... Halo Sign 6. ... #Lung #Pulmonary ... ChestCT #radiology #CTChest
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
The fourth pattern ... Honeycombing Most diseases ... Diagnosis #Radiology #Pulmonary ... #CTChest #LowAttenuation ... Emphysema #SignetRing #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
in interstitial lung ... disease comes from ... disease and what ... Diagnosis #Radiology #Pulmonary ... #Differential #RadiologyAssistant
Hilar and mediastinal lymphadenopathy
In sarcoidosis the common pattern is right paratracheal and bilateral hilar adenopathy ('1-2-3-sign').
In
sarcoidosis the common pattern ... adenopathy ('1-2-3-sign ... In lung carcinoma ... postirradiation Hodgkin disease ... Diagnosis #Radiology #Pulmonary
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
specific patterns ... realise, that these patterns ... Diagnosis #Radiology #Pulmonary ... #CTChest #Idiopathic ... ILD #Findings #RadiologyAssistant
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
or interstitial lung ... in ground glass pattern ... Diagnosis #Radiology #Pulmonary ... #CTChest #GGO # ... #Differential #RadiologyAssistant
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Hypoventilation: CNS ... Embolism, Obstructive Lung ... Disease, Interstitial ... Disease and more ... , Interstitial Lung
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
the left some diseases ... with a nodular pattern ... Diagnosis #Radiology #Pulmonary ... #CTChest #Nodular ... Comparison #Table #RadiologyAssistant
There is a hydropneumothorax.
Notice the air-fluid level (blue arrow).
The upper lobe is still attached to the
attached to the chest ... disease. ... disease that results ... airways leading to pulmonary ... Lymphangioleiomyomatosis #LAM #RadiologyAssistant
Consolidation is synonymous with airspace disease.
When you think of the causes of consolidation, think of 'what
with airspace disease ... UIP, NSIP and long ... Diagnosis #Radiology #Pulmonary ... #CTChest #Consolidation ... #Differential #RadiologyAssistant