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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 ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... #Differential #Diagram ... Emphysema #SignetRing #RadiologyAssistant
CT Lung Signs in Pulmonary Diseases - One Page Summary of Pulmonary Signs
 - Air Crescent
CT Lung Signs in ... pleura sign #ChestCT ... #CT #Lung #Signs ... #diagnosis #differential ... #radiology
Feeding Vessel Sign on Chest CT
 • Distinct pulmonary vessel leading into a lung nodule or
Vessel Sign on Chest ... CT • Distinct ... pulmonary vessel ... #Lung #Pulmonary ... #diagnosis #radiology
COVID-19 Patterns of Lung Findings on Chest CT
1. Reverse Halo Sign
2. ARDS
3. Crazy-Paving Pattern
4. Bilateral Peripheral
19 Patterns of Lung ... CT 1. ... #Pulmonary #ChestCT ... #radiology #CTChest ... #diagnosis
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
Upper lung zone ... edema #Diagnosis ... #Radiology #Pulmonary ... #HRCT #ChestCT ... #Upper #Lower #RadiologyAssistant
Ground Glass Opacities on Lung CT - Pathophysiology
Ground glass opacity lung is denser (whiter) than normal
CT - Pathophysiology ... glass opacity lung ... replacement of air ... #pulmonary #ChestCT ... Pathophysiology #Radiology
Tree-in-bud
In centrilobular nodules the recognition of 'tree-in-bud' is of value for narrowing the differential diagnosis.
Tree-in-bud describes
the differential diagnosis ... identified in the lung ... #Radiology #Pulmonary ... CTChest #TreeInBud #Diagram ... #RadiologyAssistant
Halo Sign on Chest CT
 • SPN or mass surrounded by a circumferential GGO
 • DDx:
Halo Sign on Chest ... CT • SPN or mass ... #Halo #Sign #CT ... #Lung #Pulmonary ... #diagnosis #radiology
Septic emboli
Septic emboli usually present as multiple ill-defined nodules.
In about 50% cavitation is seen.
CT demonstrates more
CT demonstrates ... can suggest the diagnosis ... abutting the pleura, air-bronchograms ... #Clinical #Radiology ... SepticEmboli #Cavity #RadiologyAssistant
There is a hydropneumothorax.
Notice the air-fluid level (blue arrow).
The upper lobe is still attached to the
Notice the air-fluid ... attached to the chest ... is a possible diagnosis ... airways leading to pulmonary ... #Clinical #Radiology