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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
Findings on Chest ... Reverse Halo Sign ... Halo Sign 6. ... Consolidation 7. ... Organizing Pneumonia
Reversed Halo Sign - Infectious and Non-Infectious Differential Diagnosis
Definition: A focal rounded area of GGO surrounded
Reversed Halo Sign ... Non-Infectious Differential ... complete ring of consolidation ... Dermatomyositis, Lung ... #Sign #Infectious
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
in HIV - Differential ... • CT: Halo sign ... dyspnea • Lobar consolidation ... Infections #HIV #AIDS #pulmonary ... #differential #
Based on the images alone, it is usually not possible to determine the cause of the
between these chest ... Lobar pneumonia ... Pulmonary hemorrhage ... nodular interstitial lung ... #CXR #Lobar #Consolidation
Pulmonary Pathology and Associated Lung Ultrasound Findings
Pneumothorax:
 - No lung sliding/barcode sign
 - Lung point (hard
Ultrasound Findings ... pleura reflection) Pneumonia ... : - Consolidation ... #differential # ... #Lung #POCUS #ultrasound
It is very important to differentiate between acute consolidation and chronic consolidation, because it will limit
very important to differentiate ... will limit the differential ... - Lung neoplasms ... #Diagnosis #Radiology ... #Pulmonary #CXR
Good example of 'shred sign' in a patient with fever, cough and shortness of breath. 

This
a patient with fever ... signifies subpleural consolidation ... on CXR/CT imaging ... #photo #ultrasound ... #lung #pulmonary
Venn Diagram - Does this patient have pneumonia?
Diagnosis is generally based on three lines of evidence:
evidence of a chest ... infiltrate (e.g., CXR ... , CT, ultrasound ... Inflammation (e.g., fever ... pain) and signs
Batwing
A bilateral perihilar distribution of consolidation is also called a Batwing distribution.
The sparing of the periphery
most typical of pulmonary ... it is seen in pneumonias ... #Diagnosis #Radiology ... #CXR #Batwing # ... Differential #RadiologyAssistant
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 ... #Sign #CT #Lung ... #Pulmonary #diagnosis