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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 ... CT 1. ... ARDS 3. ... #Pulmonary #ChestCT ... #radiology #CTChest
Head Cheese Sign on Chest CT
 • Juxtaposition of distinct radiographic areas of low, normal and
Head Cheese Sign ... on Chest CT • ... #Sign #CT #Lung ... #Pulmonary #diagnosis ... #radiology #clinical
Air Crescent Sign on Chest CT
 • Crescentic or circumferential rim of radiolucent airspace within a
Air Crescent Sign ... on Chest CT • ... #Sign #CT #Lung ... #Pulmonary #diagnosis ... #radiology #clinical
Berlin Criteria for Acute Respiratory Distress Syndrome (ARDS) 
- Respiratory symptoms must have begun within one
Distress Syndrome (ARDS ... week of a known clinical ... on a chest radiograph ... severity of the ARDS ... >= 5cm H2O #ARDS
Crazy Paving on Chest CT
 • Thickened interlobular septa in a background of diffuse GGO's.
 •
Crazy Paving on Chest ... pna, pulm hge, ARDS ... Crazy #Paving #Sign ... #CT #Lung #Pulmonary ... #clinical
Hampton hump is a radiologic sign which consists of a shallow wedge-shaped opacity in the periphery
sign which consists ... periphery of the lung ... hump along may aid ... confirmed with chest ... CT angiography.
Atoll Sign (Reverse-Halo Sign) on Chest CT
 • Central GGO surrounded by a crescentic or circumferential
Sign) on Chest ... surrounded by a crescentic ... #CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
• Pleuritic chest ... • CT: Halo sign ... Lymphadenopathy, Chest ... Pneumonia: • Chest ... Infections #HIV #AIDS
Preoperative Risk Evaluation

Major Pre-Op Questions:
1. Does the patient have any modifiable risk factors that could be
indicated • EKG ... Obtain EKG if: ... Change in clinical ... change CV risk Chest ... unless prior heart/lung