26 results
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 ... Reverse Halo Sign ... Halo Sign 6. ... Consolidation 7. ... #CTChest #diagnosis
ARDS/VALI progression over the course of 1 week 
 (a) Day 1 - No pathological findings.
some pulmonary consolidations ... involvement, with “white lung ... the differential diagnosis ... #Clinical #Radiology ... #CXR #ChestXRay
Septic emboli
Septic emboli usually present as multiple ill-defined nodules.
In about 50% cavitation is seen.
CT demonstrates more
can suggest the diagnosis ... feeding vessel sign ... which are probably consolidations ... #Clinical #Radiology ... #CXR #CTChest #
Bronchiectasis is defined as localized bronchial dilatation.
The diagnosis of bronchiectasis is usually based on a combination
The diagnosis of ... the peripheral lung ... A signet-ring sign ... infection, usually viral ... #Diagnosis #Radiology
Based on the images alone, it is usually not possible to determine the cause of the
the cause of the consolidation ... between these chest ... nodular interstitial lung ... #Clinical #Diagnosis ... #Radiology #CXR
Signet Ring Sign on Chest CT
 • Prominently dilated airway compared to its accompanying pulm vessel.
Signet Ring Sign ... • DDx: Bronchiectasis ... #Signet #Ring #Sign ... #CT #Lung #Pulmonary ... #diagnosis #radiology
Tram Track Sign on Chest CT
 • Parallel, non-tapering airways, extending to the lung periphery.
 •
Tram Track Sign ... extending to the lung ... Cylindrical or traction bronchiectasis ... #Tram #Track #Sign ... #diagnosis #radiology
Bronchiectasis - Summary

What?
• Bronchiectasis is derived from the Greek words bronckos meaning airway and ectasis meaning
Nasal polyps and signs ... centrilobular nodules, or consolidation ... in the adjacent lung ... of the affected lung ... parenchyma Diagnosis
Atoll Sign (Reverse-Halo Sign) on Chest CT
 • Central GGO surrounded by a crescentic or circumferential
Atoll Sign (Reverse-Halo ... Sign) on Chest ... circumferential denser consolidation ... #CT #Lung #Pulmonary ... #diagnosis #radiology
Air Crescent Sign on Chest CT
 • Crescentic or circumferential rim of radiolucent airspace within a
Air Crescent Sign ... a parenchymal consolidation ... Air #Crescent #Sign ... #CT #Lung #Pulmonary ... #diagnosis #radiology